SECTION 07 52 00
MODIFIED BITUMEN ROOFING
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PART 1 GENERAL
1.1
1.2
1.3
SECTION INCLUDES
A.
Roofing System: 2 ply SBS modified bitumen roof membrane using a mopped base sheet
and heat welded reflective cap sheet over coverboard, polyisocyanurate insulation and vapor
retarder.
B.
Roofing System: Partially self-adhered SBS base sheet and a heat welded SBS cap sheet.
C.
Roofing System: Cold applied SBS modified bitumen roof membrane using an adhesively
adhered base and granulated cap sheet over an asphaltic cover board, polyisocyanurate
insulation and vapor retarder.
D.
Roofing System: Mechanically fastened base sheet with heat welded cap sheet ("Fast-NWeld") SBS modified bituminous membrane roofing system.
E.
Roofing System: 2 ply SBS modified bitumen roof membrane using a mopped base sheet
and a mopped granulated cap sheet over coverboard, polyisocyanurate insulation and vapor
retarder.
F.
Roofing System: 2 ply SBS modified bitumen roof membrane using a mopped base sheet
and heat welded granulated cap sheet over coverboard, polyisocyanurate insulation and
vapor retarder.
G.
Roofing System: Heat welded SBS modified bituminous membrane roofing system.
RELATED SECTIONS
A.
Section 31 71 13 - Shield Driving Tunnel Excavation, Demolition and Salvage.
B.
Section 03 30 00 - Cast-in-Place Concrete.
C.
Section 05 31 23 - Steel Roof Decking.
D.
Section 06 10 00 - Rough Carpentry.
E.
Section 07 62 00 - Sheet Metal Flashing and Trim.
F.
Section 07 71 23 - Manufactured Gutters and Downspouts.
G.
Section 22 14 26.13 - Roof Drains.
REFERENCES
07 52 00-1
1.4
A.
ASTM C208-08a - Standard Specification for Cellulose Fiber Insulating CAN/ULC S706
Board.
B.
ASTM C1177/C1177M-08 - Standard Specification for Glass Mat Gypsum Substrate for Use
as Sheathing.
C.
ASTM D92-05a - Standard Test Method for Flash and Fire Points by Cleveland Open Cup.
D.
ASTM D1079-08a - Standard Terminology Relating to Roofing and Waterproofing.
E.
ASTM D3273-00(05) - Standard Test Method for Resistance to Growth of Mold on the
Surface of Interior Coatings in an Environmental Chamber.
F.
AWPA P5-07 - Standard for Waterborne Preservatives.
G.
CGSB 37-GP-9Ma - Primer, Asphalt, Unfilled, for Asphalt Roofing Dampproofing and
Waterproofing.
H.
CGSB 37-GP-56M - Membrane, Modified, Bituminous, Prefabricated, and Reinforced for
Roofing.
I.
CAN/CGSB-51.33-M89 - Vapor Barrier Sheet, Excluding Polyethylene, for Use in Building
Construction.
J.
CSA A123.4-04(08) - Asphalt for Constructing Built-Up Roof Coverings and Waterproofing
Systems.
K.
CSA A231.2-95 - Precast Concrete Pavers.
L.
CSA O80.1-M08 - Specification of Treated Wood.
M.
FM 4470-86 - Approval Standard for Class 1 Roof Covers.
N.
CAN/ULC-S102-07 - Surface Burning Characteristics of Building Materials and Assemblies.
O.
CAN/ULC-S107-03 - Methods of Fire Tests of Roof Coverings.
P.
CAN/ULC-S126-06 - Standard Method of Test for Fire Spread Under Roof-Deck Assemblies.
Q.
CAN/ULC-S704-03 - Standard for Thermal Insulation, Polyurethane and Polyisocyanurate
Boards, Faced.
R.
CAN/ULC-S770-00 - Determination of Long-Term Thermal Resistance of Closed-Cell
Thermal Insulating Foams.
S.
UL 1256 - Standard for Fire Test of Roof Deck Construction.
DEFINITIONS
A.
Roofing Terminology: Refer to ASTM D1079 and glossary as dictated by CRCA Manual.
B.
Phased Construction: Layered installation in which each component of cross section of roof
system are not completed in a specific roof area during a 1 day work period. This type of
construction is NOT acceptable nor permitted.
C.
Abbreviations and Acronyms:
1.
AWPA: American Wood Protection Association; www.awpa.com.
2.
CCA: Chromated copper arsenate (preservative).
3.
CRCA: Canadian Roofing Contractors' Association; www.roofingcanada.com.
07 52 00-2
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
1.5
EVT: Equiviscous Temperature.
FBT: Finish Blowing Temperature.
FSC: Forest Stewardship Council; www.fsccanada.org.
LEED: Leadership in Energy and Environmental Design; www.cagbc.org.
FM: Factory Mutual Global; www.fmglobal.com.
FP: Flash Point.
LTTR: Long Term Thermal Resistance.
MSDS: Material Safety Data Sheets.
OIRCA: Ontario Industrial Roofing Contractors Association; www.ontarioroofing.com.
SBS: Styrene-Butadiene-Styrene.
SMACNA: Sheet Metal and Air Conditioning Contractors' National Association;
www.smacna.org.
ULC: Underwriters Laboratories of Canada.
VOC: Volatile Organic Compound.
SUBMITTALS
A.
Submit under provisions of Section 01 30 00 - Administrative Requirements.
B.
Product Data: Submit Product data on components of roof system including but not limited
to:
1.
Each product to be used, composition of material, and method of installation.
2.
MSDS.
3.
Certification of compliance with applicable standards and authorities having
jurisdiction.
4.
Warranty.
C.
Shop Drawings: Submit Shop Drawings as required showing method of installation and
layout of each layer, roof edge condition details, roof penetration flashing details, control and
expansion joint details, standard roof sections, connection to air barrier in wall, details of
insulation, tapered insulation layouts, vapor retarder and sheathing securement details and
other details required for proper roof system installation not specified in, or are different from
Specifications and Drawings.
D.
Samples: Provide following samples of manufacturer's roofing system components prior to
commencement of work in this Section:
1.
Insulation 300 mm x 300 mm (12 inches x 12 inches) square.
2.
Roof membrane 300 mm x 300 mm (12 inches x 12 inches) square.
3.
Metal flashing material 300 mm (12 inches) long.
4.
Roof pavers 150 mm x 150 mm (6 inches x 6 inches) square.
E.
Test and Evaluation Reports:
1.
If requested, provide Product test reports based on evaluation of comprehensive test
performed by manufacturer and witnessed by a qualified independent testing agency
for components for roofing system.
2.
Indicate components of roofing system comply with requirements of manufacturer and
these Specifications including quantity, statistical and descriptive data for each
Product and other data pertaining to date, time and temperature for each load of bulk
asphalt.
F.
Manufacturers' Instructions: Submit manufacturers' installation instructions prior to
installation of roofing system for use during installation.
G.
Qualification Statements:
1.
Provide a certificate or letter of authorization issued by roofing system manufacturer
stating Contractor is registered, approved, authorized or licensed by roof system
manufacturer to apply their Products and furnish manufacturer's warranties if required.
07 52 00-3
2.
1.6
Contractor shall be a member in good standing of CRCA.
H.
Selection Samples: For each finish product specified, two complete sets of color chips
representing manufacturer's full range of available colors and patterns.
1.
Submit duplicate samples of full-sized shingles to match finish and profile for each
type of roofing shingle to be used on the Project.
I.
Verification Samples: For each finish product specified, two samples, minimum size 6 inches
(150 mm) square representing actual product, color, and patterns.
1.
Submit duplicate samples of full-sized shingles to match finish and profile for each
type of roofing shingle to be used on the Project.
J.
Operation and Maintenance Data: Supply necessary maintenance data and repair
instructions for binding into maintenance manuals. Data includes: Project name, location,
dated and executed copy of manufacturer's warranty, described herein and name address
and phone number of nearest manufacturer's representative. Include recommendations for
periodic inspections, care and maintenance. Identify common causes of damage with
instructions for temporary patching until permanent repair can be made.
K.
LEED Submittals:
1.
Sustainable Sites LEED Credit SS 7.2: Heat Island Effect: Roof: Provide certification
referencing building plan declaring roofing materials have a Solar Reflectance Index
(SRI) equal to or greater than 78 for slopes less than 2:12 for a minimum of 75% of
the roof surface.
2.
Materials & Resources LEED Credits MR 5: Regional Materials: Provide Product data
indicating location of material manufacturer for regionally manufactured materials.
Ensure Contractor and/or Subcontractors provide following completed forms:
a.
Submit Recycled and Regional Content Form.
3.
Materials & Resources LEED Credit MR 7: Certified Wood: Provide signed of chainof-custody certificates from applicable parties, including but not limited to timber mills,
manufacturers and distributors certifying materials and Products specified are made
from certified wood obtained from forests certified by a FSC accredited certification
body. Ensure Contractor and/or Subcontractors provide following completed forms:
a.
Submit FSC Certified Wood Content Form.
b.
Submit Rapidly Renewable Content Form.
4.
Indoor Environmental Quality LEED Credit EQ 4.1: Low-Emitting Materials: Adhesives
& Sealants: Provide manufacturers' Product data for adhesives and sealants,
including printed statement of VOC content and MSDS comply with SCAQMD Rule
#1168. Ensure Contractor and/or Subcontractors provide following completed forms:
a.
Submit Product VOC Identification Form.
5.
Indoor Environmental Quality LEED Credit EQ 4.4: Low-Emitting Materials: Composite
Wood and Laminate Adhesives: Provide manufacturers' Product data for wood
composite and laminate adhesives, including printed statement of VOC content and
MSDS stating materials and Products do not contain urea-formaldehyde. Ensure
Contractor and/or Subcontractors provide following completed forms:
a.
Submit No-Added Urea-Formaldehyde Form.
L.
Operation and Maintenance Data: Supply necessary maintenance data and repair
instructions for binding into maintenance manuals. Data includes: Project name, location,
dated and executed copy of manufacturer's warranty, described herein and name address
and phone number of nearest manufacturer's representative. Include recommendations for
periodic inspections, care and maintenance. Identify common causes of damage with
instructions for temporary patching until permanent repair can be made.
REGULATORY REQUIREMENTS
A.
Provide a roofing system achieving an ASTM E 108 Class A fire classification.
07 52 00-4
1.7
1.8
B.
Provide a roofing system achieving an ENERGY STAR rating.
C.
Ensure that materials and fastening methods meet requirements of jurisdictional authorities.
The Installer shall be licensed or otherwise authorized to install roofing in the jurisdiction the
work is to be performed in.
D.
Install all roofing products in accordance with all Federal, Provisional, State and local
building codes.
E.
All work shall be performed in a manner consistent with current OSHA guidelines.
QUALITY ASSURANCE
A.
Manufacturer Qualifications: Minimum 5 year experience manufacturing similar products.
B.
Provide all primary roofing products by a single manufacturer.
C.
Installer Qualifications:
1.
Provide a competent project foreman with minimum 5 years' experience in supervision
of roofing system installation, knowledgeable in roofing type specified herein. Ensure
foreman is present at job site during majority of work hours and is accessible to
ensure good project coordination.
2.
Do not replace foreman or crew members without prior approval of Consultant.
3.
Foreman shall monitor weather conditions and take steps to ensure appropriate
measures are implemented due to inclement conditions and to protect materials
equipment and work to date.
D.
Conform to CRCA's "Roofing Specifications - 1997" manual as amended to date of this
Specification, as applicable, except where indicated or specified otherwise. Do roofing work
employing roofing products, roof sheathing, plates and fasteners conforming to FM data for
proposed roofing system. More stringent requirements by Consultant governs.
E.
Mock-Up: Construct for review, minimum 10 m2 (100 sq ft) mock-up sample at Project
location designated by Consultant. Once accepted, mock-up remains part of finished work
and used as a quality reference standard for balance of Project.
PRE-INSTALLATION MEETINGS
A.
Arrange pre-installation meeting one week prior to commencing work with parties associated
with trade as designated in Contract Documents or as requested by Consultant. Presided
over by Contractor, include Consultant who may attend, Subcontractor performing work of
this trade, Owner's representative, manufacturer's representative, testing company's
representative and consultants of applicable discipline. Contact Consultant and involved
parties minimum two weeks prior to pre-installation meeting to confirm details of meeting.
B.
Record discussions of conference, decisions, agreements or conflicts reached and furnish a
copy to involved parties. Review preparations and installation procedures and coordinate
scheduling required for work of this Section.
C.
Review methods and procedures related to roofing including following:
1.
Tour, inspect and discuss conditions and coordination of substrate, roof drains,
locations of roof drains, curb penetrations and other work performed by trades
impacting the Work of this Section.
2.
Examine deck substrate conditions and finishes for compliance. Review structural
loading limits of deck and inspect deck for loss of flatness and for required mechanical
fastening.
3.
Review methods and procedures related to roofing installation, including
manufacturer's written instructions.
07 52 00-5
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
1.9
Review roofing system requirements (Drawings, Specifications and other Contract
documents).
Review required submittals.
Review and finalize construction schedules related to roofing work and verify
availability of materials, installer's personnel, equipment and facilities needed to make
progress and avoid delays.
Review required inspections, testing, certifying and material usage accounting
procedures.
Review weather and forecasted weather conditions, and procedures for coping with
unfavorable conditions, including possibility of temporary roofing.
Review structural loading limitations of roof deck for stocking roofing materials.
Review flashing details, roof drainage and other conditions that will affect roofing
systems.
Review fire hazard assessment of work prior to commencement of heat welding.
Review temporary protection requirements for roofing system during and after
installation.
Review roof observation and repair procedures after roofing installation.
Scheduling:
Co-operate with adjoining sub-trades and promptly proceed with work as soon as site
conditions permit.
Ensure items to be incorporated into work of this Section and items required for
incorporation by other sub-trades are supplied in a timely manner. Proceed with work
of this Section after built-in items are installed and roof substrates are completed.
DELIVERY, STORAGE, AND HANDLING
A.
Delivery and Acceptance Requirements:
1.
Deliver materials in manufacturer's original, unopened containers with manufacturer's
labels intact and legible.
2.
Carefully unload in a manner to prevent damage.
B.
Storage and Handling Requirements:
1.
Refer to Product MSDS for precautionary measures during storage and handling.
2.
Keep pail goods and membrane materials dry, stored in rolls standing on end, selvage
edge up, elevated from contact with moisture, at temperatures not less than 4 degrees
C (40 degrees F) or more than 49 degrees C (120 degrees F) and pre-conditioned
before installation. Handle rolls with care to avoid crushing, puncturing or other
damage. Ensure selvage edge is not damaged during handling and banding strips are
removed before application of membrane. Do not use wet or damp membrane or
flattened rolls.
3.
Protect materials from damage by elements, weather and other activities on raised
platforms and covered with breathable tarpaulins.
4.
Ensure pail-goods have tight fitting lids when not in use. Store on end in up-right
position.
5.
Ensure materials stored on roof stay within designated live load limits of roof
construction. Provide ample bases under equipment and materials to distribute weight
to conform to these live load limits. Do not store materials on, or transport materials
across, completed roof areas.
6.
Do not expose insulation and roof sheathing to wet weather. Store and handle
insulation to prevent broken edges and corners, punctures, indentations or other
damage. Remove damaged insulation from site.
7.
Ensure bitumen delivered in form of cartons has manufacturer's material identification
labels intact on each carton; if in form of bulk tanker delivery, each shipment to be
accompanied by written certificate from manufacturer confirming material identification
including following:
a.
Softening Point as per CSA A123.4.
07 52 00-6
8.
9.
10.
11.
12.
13.
14.
b.
Minimum FP per ASTM D92.
c.
EVT.
d.
FBT.
Do not intermix different types or grades of bitumen in bulk shipments.
Protect sheet metal materials from bending and scratching.
Store adhesive, emulsion based waterproofing mastics, sealants and primers between
15 degrees C and 26 degrees C (59 degrees F and 79 degrees F), or restore to
temperature ranges before use.
Store materials at site within temporary sheds or trailers; such facilities must be well
sealed and kept at least 3 degrees C (5 degrees F) warmer than exterior ambient
temperature to ensure materials remain dry in terms of roofing. Do not use wet, damp,
frozen or damaged materials. Stack rolls of felt on end.
Do not store more than 1 day's supply of materials on roof at any time. On roof, stack
materials on pallets and completely cover with incombustible waterproof tarpaulin
whenever work is interrupted, or when there is precipitation of any kind. Securely tie
covering to pallets in such way as to be weather tight. Plastic covers and shrink-wrap
covers by manufacturers are not acceptable for site storage and be removed upon
delivery to roof.
Store combustible materials away from heat and open flames. Protect and store
materials in dry, ventilated area away from welding flame, spark and from elements or
harmful substance.
Do not lift rigid insulation in slings which will damage edges. Remove damaged
insulation and replace with new material at no cost to Owner.
1.10 PROJECT CONDITIONS
A.
Ambient Conditions: Do not apply roof system during inclement weather or when ambient
temperatures are expected to be below 5 degrees C (40 degrees F). For temperatures below
this practice cold weather application techniques as recommended by membrane
manufacturer.
B.
Existing Conditions:
1.
Modifications are to take place on existing adjacent roof areas as part of work of this
Section. Do no use existing roof areas as storage, except to extent required for
removal, alteration and replacement of work.
2.
Existing roofing may be covered by an existing roofing warranty. Obtain from
Consultant necessary information regarding such warranty and notify manufacturer of
existing roof by letter before work is commenced on existing roof.
3.
Execute alteration work in manner to maintain existing warranty.
4.
Provide temporary protection of existing roof while existing construction is open.
1.11 SEQUENCING
A.
Ensure that products of this section are supplied to affected trades in time to prevent
interruption of construction progress.
1.12 WARRANTY SUPPLEMENT
A.
Limited Labor and Membrane Warranty:
1.
Warrant work of this Section for a period of 5 years against roof leaks as a result of
material defects in accordance with General Conditions of the Contract. Promptly
correct any defects or deficiencies which become apparent within warranty period, to
satisfaction of Consultant and at no expense to Owner. Defects include but are not
limited to; leaking, buckling, opening of seams, bond failure and extensive color
fading.
2.
In addition to above, provide to Owner a written warranty covering defects of
workmanship for a period of 2 years commencing from date of Substantial
07 52 00-7
Performance of the Work and agree to Make Good promptly any defects which occur
or become apparent within warranty period in conjunction with membrane
manufacturer's warranty. Ensure warranty is on either CRCA's or OIRCA's "Standard
Form of Warranty.
PART 2 PRODUCTS
2.1
2.2
2.3
2.4
MANUFACTURERS
A.
Acceptable Manufacturer: IKO Roofing - Commercial, which is located at: 1600 42nd Ave.
S.E.; Calgary, AB, Canada T2G 5B5; Toll Free Tel: 855-IKO-ROOF (855-456-7663);
Email:request info (infocommercial@iko.com); Web:www.iko.com
B.
Substitutions: Not permitted.
C.
Requests for substitutions will be considered in accordance with provisions of Section 01 60
00 - Product Requirements.
SBS MODIFIED BITUMEN ROOF SYSTEM
A.
System: A 2 ply SBS modified bitumen roof membrane using a mopped base sheet and heat
welded reflective cap sheet over coverboard, polyisocyanurate insulation and vapor retarder.
B.
Product: Armourcool Roof System as manufactured by IKO Roofing.
C.
Regulatory Requirements:
1.
External Fire Resistance: Design roofing system to meet minimum Class C in
accordance with CAN/ULC-S107 test method or Class C minimum in accordance with
ASTM E108, and/or CAN/ULC S107 Test Method.
2.
Internal Fire Resistance: Design roofing system to comply with CAN/ULC-S126,
standard test method for fire spread under metal roof deck assemblies.
3.
Compliance with Local, Provincial and Federal Building Codes: Ensure roofing system
complies with authorities having jurisdiction over construction covered within scope of
this Section.
SBS MODIFIED BITUMEN ROOF SYSTEM
A.
System: A 2 ply SBS modified bitumen roof membrane using a partially self-adhered base
sheet and heat welded granulated cap sheet over asphaltic coverboard, polyisocyanurate
insulation and vapor retarder.
B.
Product: Armourvent Roof System as manufactured by IKO Roofing.
C.
Regulatory Requirements:
1.
External Fire Resistance: Design roofing system to meet minimum Class C in
accordance with CAN/ULC-S107 test method.
2.
External Fire Resistance: Design roofing system to meet minimum Class A in
accordance with CAN/ULC-S107 test method.
3.
Internal Fire Resistance: Design roofing system to comply with CAN/ULC-S126,
standard test method for fire spread under metal roof deck assemblies.
4.
Compliance with Local, Provincial and Federal Building Codes: Ensure roofing system
complies with authorities having jurisdiction over construction covered within scope of
this Specification.
SBS MODIFIED BITUMEN ROOF SYSTEM
A.
System: An SBS modified bitumen roof membrane using an adhesively adhered base sheet
and an adhesively adhered granulated cap sheet over asphaltic coverboard,
07 52 00-8
polyisocyanurate insulation and vapor retarder.
2.5
2.6
2.7
B.
Product: Cold Gold Roof System as manufactured by IKO Roofing.
C.
Regulatory Requirements:
1.
External Fire Resistance: Design roofing system to meet minimum in accordance with
CAN/ULC-S107 for surface burning test method.
a.
Class A.
b.
Class B.
c.
Class C.
2.
Internal Fire Resistance: Design roofing system to comply with CAN/ULC-S126,
standard test method for fire spread under metal roof deck assemblies.
3.
Compliance with Local, Provincial and Federal Building Codes: Ensure roofing system
complies with authorities having jurisdiction over construction covered within scope of
this Specification.
SBS MODIFIED BITUMEN ROOF SYSTEM
A.
System: A 2 ply SBS modified bitumen roof membrane using a mechanically fastened base
sheet and heat welded granulated cap sheet over coverboard (where indicated or required),
polyisocyanurate insulation and vapor retarder.
B.
Product: Fast-N-Weld Roof System as manufactured by IKO Roofing.
C.
Regulatory Requirements:
1.
External Fire Resistance: Design roofing system to meet minimum in accordance with
CAN/ULC-S107 for surface burning test method.
a.
Class A.
b.
Class B.
c.
Class C.
2.
Internal Fire Resistance: Design roofing system to comply with CAN/ULC-S126,
standard test method for fire spread under metal roof deck assemblies.
3.
Compliance with Local, Provincial and Federal Building Codes: Ensure roofing system
complies with authorities having jurisdiction over construction covered within scope of
this Specification.
SBS MODIFIED BITUMEN ROOF SYSTEM
A.
System: A 2 ply SBS modified bitumen roof membrane using a mopped base sheet and a
mopped granulated cap sheet over coverboard, polyisocyanurate insulation and vapor
retarder.
B.
Product: Mop-Mop Roof System as manufactured by IKO Roofing.
C.
Regulatory Requirements:
1.
External Fire Resistance: Design roofing system to meet minimum Class C in
accordance with CAN/ULC-S107 test method.
2.
External Fire Resistance: Design roofing system to meet minimum Class A in
accordance with CAN/ULC-S107 test method.
3.
Internal Fire Resistance: Design roofing system to comply with CAN/ULC-S126,
standard test method for fire spread under metal roof deck assemblies.
4.
Compliance with Local, Provincial and Federal Building Codes: Ensure roofing system
complies with authorities having jurisdiction over construction covered within scope of
this Specification.
SBS MODIFIED BITUMEN ROOF SYSTEM
07 52 00-9
2.8
2.9
A.
System: A 2 ply SBS modified bitumen roof membrane using a mopped base sheet and heat
welded granulated cap sheet over coverboard, polyisocyanurate insulation and vapor
retarder.
B.
Product: Mop-Torch Roof System as manufactured by IKO Roofing.
C.
Regulatory Requirements:
1.
External Fire Resistance: Design roofing system to meet minimum Class C in
accordance with CAN/ULC-S107 test method.
2.
External Fire Resistance: Design roofing system to meet minimum Class A in
accordance with CAN/ULC-S107 test method.
3.
Internal Fire Resistance: Design roofing system to comply with CAN/ULC-S126,
standard test method for fire spread under metal roof deck assemblies.
4.
Compliance with Local, Provincial and Federal Building Codes: Ensure roofing system
complies with authorities having jurisdiction over construction covered within scope of
this Specification.
SBS MODIFIED BITUMEN ROOF SYSTEM
A.
System: A 2 ply SBS modified bitumen roof membrane using a heat welded base sheet and
heat welded granulated cap sheet over asphaltic coverboard, polyisocyanurate insulation
and vapor retarder.
B.
Product: Torch-Torch Roof System as manufactured by IKO Roofing.
C.
Regulatory Requirements:
1.
External Fire Resistance: Design roofing system to meet minimum Class C in
accordance with CAN/ULC-S107 test method.
2.
External Fire Resistance: Design roofing system to meet minimum Class A in
accordance with CAN/ULC-S107 test method.
3.
Internal Fire Resistance: Design roofing system to comply with CAN/ULC-S126,
standard test method for fire spread under metal roof deck assemblies.
4.
Compliance with Local, Provincial and Federal Building Codes: Ensure roofing system
complies with authorities having jurisdiction over construction covered within scope of
this Specification.
ROOFING - GENERAL
A.
Material Compatibility: Components of roof system shall be compatible with adjoining
materials under application and service as demonstrated by roofing manufacturer and based
on testing and field experience.
B.
Design roofing membrane system and base flashings to be watertight, to not permit passage
of water through finished roof system, and to resist exposure to weather without failure.
C.
Sustainability Characteristics:
1.
Applicable LEED Credits: This Section contains items that shall meet performance
requirements of following LEED Categories and Credits:
a.
Sustainable Sites (SS):
1)
SS Credit 7.2 - Heat Island Effect: Roof.
b.
Materials & Resources (MR):
1)
MR Credit 5 - Regional Materials.
2)
MR Credit 7 - Certified Wood.
c.
Indoor Environmental Quality (EQ):
1)
EQ Credit 4.1 - Low-Emitting Materials: Adhesives & Sealants.
2)
EQ Credit 4.4 - Low-Emitting Materials: Composite Wood and Laminate
Adhesives.
07 52 00-10
2.
3.
4.
5.
D.
LEED Performance Criteria, Credit SS 7.2: Provide proof that reflective cap sheet has
a minimum SRI of 78 for slopes less than 2:12.
LEED Performance Criteria, Credit MR 7: Provide wood-based materials and
Products produced from wood obtained from forests certified in accordance with
FSC's Principles.
LEED Performance Criteria, Credit EQ 4.1: Provide adhesives and sealants with VOC
content limits lower than stated in the State of California's SCAQMD Rule #1168,
current edition.
LEED Performance Criteria, Credit EQ 4.4: Do not use composite wood and laminate
adhesives containing urea-formaldehyde.
Performance/Design Criteria:
1.
Material Compatibility: Components of roof system shall be compatible with adjoining
materials under application and service as demonstrated by roofing manufacturer and
based on testing and field experience.
2.10 SUBSTRATE REQUIREMENTS
A.
Concrete Deck Roof System: ProvideSBS modified bituminous roofing membrane
systemover concrete deck, including but not limited to following:
1.
Concrete deck (by others).
2.
Primer over concrete deck.
3.
Vapor Retarder: 2 plies of organic felt mopped in asphalt
4.
Vapor Retarder: Type IV glass felts mopped in asphalt.
5.
Base rigid insulation board.
6.
Tapered insulation.
7.
Cover board.
8.
Base sheet.
9.
Cap sheet membrane (heat welding application)
10.
Cap Sheet Flashing: Self-adhesive cap sheet flashing.
11.
Cap Sheet Flashing: Heat welded cap sheet flashing.
12.
Accessories:
a.
Metal flashing.
b.
Roof walkways.
c.
Perimeter precast pavers.
B.
Metal/Wood Deck Roof System: Provide SBS modified bituminous roofing membrane
system over metal deck, including but not limited to following:
1.
Mopped vapor Retarder:
a.
Substrate: Metal deck.
b.
Gypsum roof sheathing with vapor retarder (2 plies of felt mopped in asphalt
over roof sheathing).
2.
Sheet Vapor Retarder:
a.
Vapor retarder directly over deck (Kraft laminated, glass reinforced sheet vapor
retarder), adhered or loose laid.
3.
Base rigid insulation board.
4.
Tapered insulation.
5.
Coverboard.
6.
Base sheet.
7.
Cap sheet.
8.
Cap Sheet Flashing: Self-adhesive cap sheet flashing.
9.
Cap Sheet Flashing: Heat welded cap sheet flashing.
10.
Accessories:
a.
Metal flashing.
b.
Roof walkways.
c.
Perimeter precast pavers.
07 52 00-11
2.11 MATERIALS
A.
Sheet Materials:
1.
Sheathing: Gypsum glass mat reinforced silicone treated board conforming to ASTM
C1177/C1177M, noncombustible according to ASTM E136/CAN/ULC-S114 thermal
barrier as tested to UL 1256/CAN/ULC-S126, flame spread 0, smoke developed 0 to
ASTM E84/CAN/ULC-S102 and ASTM D3273 with a rating of 10, no mold growth
after 4 weeks exposure, minimum 6 mm (1/4 inch) or for fire rating requirement 12
mm (1/2 inch) thick gypsum board 1200 mm (4 feet) wide, maximum practical length,
tapered edge as required.
2.
Vapor Retarder: Kraft laminated paper, glass edge reinforced with asphalt filler, in
compliance with CAN/CGSB-51.33-M, Type 2. Provide "Armourgard Vapor Retarder"
3.
Vapor Retarder: Self-adhering membrane composed of modified SBS asphalt with a
top surface of high density cross laminated polyethylene film. Provide "IKO MVP
(Modified Vapor Protector)" by IKO Industries Ltd.
4.
Adhesive for Vapor Retarder: Provide "Armourgard Vapor Retarder Adhesive" by IKO
Industries Ltd.
5.
Polyisocyanurate Insulation: Closed cell rigid foamed plastic boards conforming to
CAN/ULC-S704, Type 2, Class 3, faced with glass reinforced organic felt paper,
perforated, maximum board size 1220 mm x 2440 mm (4 feet - 0 inch x 8 feet - 0 inch)
for mechanically attached application, maximum board size of 1220 mm x 1220 mm (4
feet - 0 inch x 4 feet - 0 inch) for hot asphalt application, minimum 84 mm (3.3 inches)
thick to furnish a minimum R-Value in accordance with CAN/ULC-S770, LTTR of 20.4.
Provide "IKOTherm" by IKO Industries Ltd.
6.
Tapered Insulation Coverboard: ASTM C208, Type II, Grade 2, asphalt coated
fiberboard.
a.
Minimum compressive strength of 172 kPa (25 psi), regular density.
b.
Minimum compressive strength of 310 kPa (45 psi), high density.
c.
Taper cut to provide slopes indicated, on computer controlled machine and
sequence packed and code with detailed installation instructions, but never less
than 13 mm (1/2 inch) thick. Single layer insulating system combining base
insulation and tapered insulation will not be accepted as substitute to multilayer insulating system.
7.
Coverboard: Asphalt impregnated rigid wood fibreboard separation sheet, conforming
to CSA A247 and CAN/ULC-S704, with a compression strength of 310 kPa (45 psi) @
10% deformation, 11 mm (7/16 inch) thick, maximum board size 1.22 m x 1.22 m (4' 0 inch x 4' - 0 inch).
8.
Coverboard: Asphaltic core board comprised of mineral fortified asphalt sandwiched
between a non woven glass reinforced mat, board size 1220 mm x 1524 mm x 3 mm
(4 feet- 0 inch x 5 feet- 0 inch x 1/8 inch). Provide "Protectoboard" by IKO Industries
Ltd.
9.
SBS Modified Bitumen Base Sheet: SBS modified asphalt base sheet meeting CGSB
37-GP-56M, Type 2, Grade 2, Class P, 180 g/m 2(0.6 oz/sq ft) polyester reinforced,
sanded bottom surface and thermo-fusible film top surface. Provide "Modiflex MP180-FS Base" by IKO Industries Ltd.
10.
SBS Modified Bitumen Base Sheet: SBS modified asphalt base sheet meeting CGSB
37-GP-56M, Type 2, Grade 2, Class P, 95 g/m 2(1.95 lb/100 sq ft) fiberglass
reinforced, sanded bottom surface and thermo-fusible film top surface. Provide
"Modiflex MF-95-FS Base" by IKO Industries Ltd.
11.
SBS Modified Bitumen Base Sheet: SBS modified asphalt base sheet meeting CGSB
37-GP-56M, Type 2, Grade 2, Class P, 180 g/m 2(0.6 oz/sq ft) polyester reinforced,
thermo-fusible film on bottom and top surface. Provide "Torchflex TP-180-FF Base" by
IKO Industries Ltd.
12.
SBS Modified Bitumen Base Sheet: SBS modified asphalt base sheet, 95 g/m 2(0.31
oz/sq ft) fiberglass reinforced, thermofusible film on bottom and top surface. Provide
"Torchflex TF-95-FF Base (2.2)" by IKO Industries Ltd.
07 52 00-12
13.
14.
15.
16.
17.
SBS Modified Bitumen Base Flashing: SBS modified asphalt base sheet meeting
CGSB 37-GP-56M, Type 2, Grade 2, Class P, 180 g/m2(0.6 oz/sq ft) polyester
reinforced, sanded bottom surface and thermo-fusible film on top surface. Provide
"Modiflex MP-180-FS Base" by IKO Industries Ltd.
SBS Modified Bitumen Base Flashing: SBS modified asphalt base sheet meeting
CGSB 37-GP-56M, Type 2, Grade 2, Class P, 180 g/m2(0.6 oz/sq ft) polyester
reinforced, thermo-fusible film on bottom and top surface. Provide "Torchflex TP-180FF Base" by IKO Industries Ltd.
SBS Modified Bitumen Base Flashing: Self-adhesive SBS modified asphalt base
sheet meeting CGSB 37-GP-56M, Type 2, Grade 2, Class P, 140 g/m 2(0.46 oz/sq ft)
polyester reinforced, silicone treated removable film bottom surface and thermofusible
film top surface. Provide "ArmourBond Flash" by IKO Industries Ltd.
SBS Modified Bitumen Cap Sheet/Cap Sheet Flashings: high Reflectance SBS
Modified Bitumen Cap Sheet: SBS modified asphalt sheet meeting CGSB 37-GP56M, Type 2, Grade 2, Class G, 180g/m 2non-woven polyester reinforced sheet with a
thermo-fusible film on bottom for heat welding and a highly reflective white top
granulated surface. Provide "ArmourCool Granular" by IKO Industries Ltd.
Primer for Self-Adhesive Materials: Quick drying, 1 part, solvent based primer for selfadhering membranes. Provide "IKO S.A.M. Adhesive" by IKO Industries Ltd.
B.
Bituminous Materials:
1.
Asphalt Bitumen: Oxidized asphalt conforming to CSA A123.4. Provide "Type II, III
and Easy Melt 200" by IKO Industries Ltd as required by manufacturer.
2.
SEBS Asphalt: A blend of SEBS rubbers and select asphalt conforming to ASTM
D6152 and UL55A. Provide Modi-Melt SEBS by IKO Industries Ltd.
3.
Asphalt Primer: Unfilled asphalt conforming to ASTM D-41 and CGSB 37-GP-9.
Provide "IKO Standard Asphalt Primer"
4.
Plastic Cement: Fibrated cut back type plastic asphalt compound.
5.
Rubberized Asphalt Sealing Compound conforming to ASTM D 4586 & D 3409.
"Aquabarrier Mastic" by IKO Industries Ltd.
6.
Bituminous Paint: As recommended by IKO Industries Ltd.
C.
Lumber, Nailers and Blocking:
1.
#2 grade or better plank. Pressure treated lumber to CSA O80.1-M with CCA to
AWPA P-5. Asphalt treated creosote impregnated lumber will not be accepted. Piping
of lumber shall not be permitted.
2.
Seal cut ends of lumber with Coppers Napthenate preservative to CSA O80.1-M.
D.
Fasteners:
1.
Ensure fasteners compatibility with roof membranes and flashings. Fasteners to be of
type and size shown on Drawings and acceptable by roofing membrane manufacturer.
2.
Use self-drilling, self-tapping, organic fluoropolymer coated screws for securing of
wood nailers and blocking. Screws to pass FM V Class 1 criteria, minimum of 30
cycles in a Kesternich Cabinet. Ensure thread diameter is minimum 6 mm (0.245 inch)
such as "#14 HD" by Tru-Fast.
3.
Ensure nails used to secure metal to wood are galvanized and long enough to
penetrate wood by a minimum of 25 mm (1 inch).
4.
Use self-drilling, self-tapping, organic fluoropolymer coated screws to secure rigid
insulation to decking. Screws to pass FM Class 1 criteria, minimum of 30 cycles in a
Kesternich Cabinet. Ensure thread diameter is minimum 5.58 mm (0.220 inch) such
as "#12 DP" by Tru-Fast and penetrate decking by a minimum of 25 mm (1 inch).
5.
Stressplates for Insulation Attachment: 75 mm (3 inches) diameter, galvanized steel
or Galvalume, "MP-3" by Tru-Fast or equal.
6.
Fasteners shall be acceptable to membrane manufacturer and be in compliance with
fastener standard FM 4470, 1-28 and 1-29.
07 52 00-13
E.
Concrete Roof Pavers: Precast concrete conforming to CSA A231.2 having minimum
strength of 35 MPa (5000 psi), steam cured, 4% and 6% entrained air, with edges
chamfered and non-slip finish, 610 mm 610 mm x 64 mm (24 inches x 24 inches x 2-1/2
inches) thick.
F.
Paver Pedestals: Black plastic mouldings, UV resistant, adjustable, complete with spacers.
Provide mid-span pad under each paver to avoid breakage.
G.
Walkways: SBS modified asphalt cap sheet membrane of a different color from field
membrane cap sheet. Provide "Torchflex" or "Modiflex Cap Sheets" by IKO Industries Ltd.
H.
Accessories
1.
Stack-Jack Flashings: 1.6 mm (0.063 inch) thick x 300 mm (12 inches) high x
diameter to suit, seamless, spun aluminum sleeve flashings with premoulded
urethane insulation on inner side of sleeve and 100 mm (4 inches) wide bituminous
paint primed flange with removable 1.2 mm (0.047 inch) thick aluminum cap with
neoprene grommet cap seal and 1.6 mm (0.063 inch) thick aluminum type bitumen
protection cup. Provide "Flash-Tite Flashings Model VSC-G" by Lexsuco Canada.
2.
Flashings for Flexible Conduit: 1.3 mm (0.051 inch) thick x 300 mm (12 inches) high x
diameter to suit, seamless, spun copper sleeve flashings with premoulded urethane
insulation on inner side of sleeve, 150 mm (6 inches) wide bituminous paint primed
sleeve flange with 0.69 mm (0.027 inch) thick flexible copper liner with premoulded
urethane insulation on inner side of liner. Provide "Flash-Tite Flashings, Model WPF12" by Lexsuco Canada.
3.
Flashings for "B" Vents: 2.1 mm (0.083 inch) thick x 300 mm (12 inches) high x
diameter to suit, seamless spun aluminum sleeve flashing with sloping sides having
50 mm (2 inches) wide perforated aluminum vent holes at top of sleeve, 100 mm (4
inches) wide bituminous paint primed sleeve flange with 2.1 mm (0.083 inch) thick
split aluminum collar, aluminum rivets, and 4.8 mm (3/16 inch) diameter stainless
steel nuts and bolts and 1.6 mm (0.063 inch) thick aluminum type bitumen protection
cup. Provide "Flash-Tite B-Vent Flashings" by Lexsuco Canada.
4.
Flashings for Gas Lines: 1.6 mm (0.063 inch) thick x 300 mm (12 inches) high x
diameter to suit, seamless spun aluminum sleeve flashing with 50 mm (2 inches) wide
perforated aluminum vent holes at top of sleeve, 100 mm (4 inches) wide bituminous
paint primed sleeve flange with removable 1.3 mm (0.051 inch) thick formed
aluminum collar and 2.1 mm (0.083 inch) thick aluminum type bitumen protection cup.
Provide "Flash-Tite Flashings" by Lexsuco Canada.
PART 3 EXECUTION
3.1
EXAMINATION
A.
Verification of Conditions:
1.
Verify actual site dimensions and location of adjacent materials prior to commencing
work. Notify Consultant in writing of any conditions which would be detrimental to
installation.
2.
Verify roof penetrations and drains are present in quantity required. Verify that roof
drains are securely clamped in place.
3.
Verify wood blocking is securely anchored to deck and nailers match thickness of
anticipated roof insulation.
4.
Examine substrate for compliance of conditions that affect installation and
performance of roof system.
B.
Evaluation and Assessment: Proceed with installation of roof after unsatisfactory conditions
have been corrected. Commencement of work implies acceptance of previously completed
work.
07 52 00-14
3.2
PREPARATION
A.
3.3
Surface Preparation:
1.
Ensure decking is clean, dry and properly anchored prior to roof installation.
2.
Ensure concrete substrate is clean, smooth and dry prior to roof installation.
APPLICATION
A.
Safety Precautions: Refer to Product MSDS sheets for any safety requirements when
applying components.
B.
Vapor Retarder to Concrete:
1.
Apply vapor retarder primer, (if required), and adhesive at rate required by
manufacturer.
2.
Unroll vapor retarder into freshly applied adhesive.
3.
Coat side laps with adhesive overlapped a minimum of 51 mm (2 inches).
4.
Overlap and seal end laps a minimum of 152 mm (6 inches) with adhesive.
5.
Encapsulate insulation using vapor retarder material to affect a proper tie-in to
building's continuous air/vapor barrier system.
C.
Vapor Retarder to Steel/Wood Deck:
1.
Apply vapor retarder adhesive to male flutes of metal deck or across surface of wood
deck at a rate of 0.43 L/m2 (257 sq ft/gal).
2.
Unroll vapor retarder into freshly applied adhesive ensuring side laps fall over a male
flute for joining later.
3.
Coat side laps with adhesive overlapped a minimum of 51 mm (2 inches).
4.
Overlap and seal end laps a minimum of 152 mm (6 inches) with adhesive.
5.
Encapsulate insulation using vapor retarder material to affect a proper tie-in to
building's continuous air/vapor barrier system and encapsulation of insulation.
D.
Self-Adhered Air/Vapor Barriers:
1.
Apply primer by roller or spray to all surfaces to be covered with self-adhered
membrane as required and allow to dry.
2.
Unroll and align self-adhered membrane centered at low point of roof or drain. Apply
self-adhered membrane
3.
Apply self-adhered membrane complete and continuous to prepared and primed
substrate in an overlapping shingle fashion by removing release film providing 76 mm
(3 inches) side and end laps in accordance with manufacturer's written instructions.
Stagger all vertical joints. Promptly roll all laps and self-adhered membrane with a
counter top roller to affect the seal.
E.
Rigid Insulation:
1.
Mechanically Attached: Install 1220 mm x 4880 mm (4 feet- 0 inch x 8 feet- 0 inch)
sheets of insulation with joints tightly fit and staggered from adjacent boards. Ensure
multiple layered insulation joints are staggered minimum 300 mm from joints below.
Use fastening density of screws and plates as determined by Factory Mutual FM 1-90
or follow the insulation manufacturer's recommendations.
2.
Asphalt Attached: Install 1220 mm x 1220 mm (4 feet - 0 inch x 4 feet - 0 inch) for hot
asphalt application, sheets of insulation such that joints are tightly fit and staggered
from adjacent boards. Ensure multiple layered insulation joints are staggered
minimum 300 mm (12 inches) from joints below. Install insulation in a full mopping of
Type II asphalt with maximum EVT of 224 degrees C (435 degrees F), applied at a
nominal rate of 1.5 kg/m2 (25 lbs/100 sq ft). Walk insulation panels into asphalt to
ensure full and continuous contact. Repeat pattern for multiple layers.
3.
Comply with IKO Technical Binder for fastening patterns.
4.
Fill gaps in excess of 3 mm (1/8 inch) with fully adhered insulation material trimmed
from same insulation being installed.
07 52 00-15
5.
Install insulation around roof drains forming a sump of 1220 mm x 1220 mm x 13 mm
(4 feet - 0 inch x 4 feet - 0 inch x 1/2 inch). Ensure minimum required RSI (R) value is
achieved in sump area.
F.
Coverboard:
1.
Stagger coverboard joints with insulation joints when applying 1220 mm x 1220 mm (4
feet- 0 inch x 4 feet- 0 inch) sheets of coverboard "Wood Fiber Separation Sheet"
2.
Stagger coverboard joints with insulation joints when applying 1220 mm x 1524 mm x
3 mm (4 feet- 0 inch x 5 feet- 0 inch x 1/8 inch) sheets of coverboard "Protectoboard".
3.
In a full mopping, embed coverboard over polyisocyanurate roof insulation using Type
II asphalt with maximum EVT of 224 degrees C (435 degrees F), applied at a nominal
rate of 1.5 kg/m2 (25 lbs/100 sq ft). Check attachment tenacity from time to time.
4.
Lay coverboard with joints offset minimum 300 mm (12 inches) from underlying layer.
5.
At drains ensure that sump depth is kept to a minimum of 13 mm (1/2 inch) below
finished roof surface.
G.
Roof Membrane
1.
Starting at lowest point of roof or at centerline of roof drain, unroll and dry fit base
sheet and allow it to relax.
2.
Apply base sheet in hot asphalt at a rate of 1.25 kg/m2 (25 lbs/sq.ft). +/- 20% with an
EVT of 246 degrees C (475 degrees F).
3.
Unroll membrane max 1200 mm (4 feet - 0 inch) in behind mopping application.
4.
Side Laps for Membranes: 90 mm (3-1/2 inches).
5.
End Laps for Membranes: 150 mm (6 inches).
6.
Reinforce around projections and drains using additional ply of base sheet per
manufacturer's instructions.
7.
Continue across field of roof until entire roof is covered with base sheet. Ensure end
laps are staggered from each other by a minimum of 610 mm (24 inches) in process.
8.
Continue application of base membrane 50 mm (2 inches) above top of cant, at
parapet.
9.
Starting at lowest point of roof or at centerline of roof drain, unroll and dry fit base
sheet and allow it to relax.
10.
Heat weld base membrane in accordance with manufacturer's instructions.
11.
Side Laps for Membranes: 90 mm (3-1/2 inches).
12.
End Laps for Membranes: 150 mm (6 inches).
13.
Reinforce around projections and drains using additional ply of base sheet per
manufacturer's instructions.
14.
Continue across field of roof until entire roof is covered with base sheet. Ensure end
laps are staggered from each other by a minimum of 610 mm (24 inches) in process.
15.
Continue application of base membrane 50 mm (2 inches) above top of cant, at
parapet.
16.
Use a single burner torch system only for heat welding of cap sheet and base sheet
end lap details.
17.
Install cap sheet via heat welding over base sheet in accordance with manufacturer's
instructions. Stagger side laps from base sheet side laps minimum 152 mm (6
inches), stagger end laps minimum 150 mm (6 inches) from base sheet end laps and
610 mm (24 inches) from other cap sheet end laps.
18.
Apply low heat via propane torch to the granulated surface and a metal trowel to
lightly press granules into the bitumen prior to affecting an end lap. Avoid overheating
to ensure good bitumen to bitumen contact results at end laps.
19.
Fully adhere cap and base sheet membranes free of wrinkles, buckles, fish mouths,
voids or seams bucking natural flow of water. Repair any areas exhibiting flaws
immediately in accordance with the membrane manufacturer's instruction.
20.
Apply temporary water cut-offs extending a minimum of 152 mm (6 inches) onto
completed roof membrane at end of each day and remove fully on start of next
Working Day.
07 52 00-16
H.
Base Flashings and Cap Flashings:
1.
Install new wood blocking and metal where required and as specified in other
Sections of this Specification.
2.
Install base flashings in accordance with Drawings and roofing membrane
manufacturer's requirements.
3.
Hot mop base flashing membrane with Type III asphalt bitumen at a rate of 1.25
kg/m2 (25 lbs/sq.ft) +/- 20%.
4.
Extend tops and vertical laps of base sheet flashings over parapets and nail on
exterior face using roofing nails spaced 200 mm (8 inches) oc. Terminate base
flashing at 450 mm (18 inches) for parapets above 450 mm (18 inches) in height and
fix in place using a termination bar. On lower parapets install flashing minimum 200
mm (8 inches) above finished roof surface.
5.
Ensure base sheet flashing width of 1 m (39 inches) width staggering seams a
minimum of 300 mm (12 inches) from laps in base sheet. Prime parapets fully prior to
application of base sheet flashing and ensure that it runs onto field a minimum of 200
mm (8 inches). Place into position and roll smooth to ensure a solid bond.
6.
Thoroughly prime exposed metal prior to installation of base sheet flashing. Follow
primer manufacturer's instructions as to dry time.
7.
Provide reinforcement gusset at inside corners in accordance with membrane
manufacturer.
8.
Install new wood blocking and metal where required and as specified.
9.
Install base flashings in accordance with Drawings and roofing membrane
manufacturer's requirements.
10.
Heat weld base flashing membrane in accordance with manufacturer's instructions.
11.
Extend tops and vertical laps of base sheet flashings over parapets and nail on
exterior face using roofing nails spaced 200 mm (8 inches) oc. Terminate base
flashing at 450 mm (18 inches) for parapets above 450 mm (18 inches) in height and
fix in place using a termination bar. On lower parapets install flashing minimum 200
mm (8 inches) above finished roof surface.
12.
Ensure base sheet flashing width of 1 m (39 inches) width staggering seams a
minimum of 300 mm (12 inches) from laps in base sheet. Prime parapets fully prior to
application of base sheet flashing and ensure that it runs onto field a minimum of 200
mm (8 inches). Place into position and roll smooth to ensure a solid bond.
13.
Thoroughly prime exposed metal before installation of base sheet flashing prior to
covering exposed metal. Follow primer manufacturer's instructions as to dry time.
14.
Install new wood blocking and metal where required and as specified.
15.
Install base flashing in accordance with Drawings and roofing membrane
manufacturer's requirements.
16.
Extend tops and vertical laps of base flashing flashings over parapets and nail on
exterior face using roofing nails spaced 200 mm (8 inches) oc. Terminate base
flashing at 450 mm (18 inches) for parapets above 450 mm (18 inches) in height and
fix in place using a termination bar. On lower parapets install flashing minimum 200
mm (8 inches) above finished roof surface.
17.
Ensure base flashing width of 1 m (39 inches) width staggering seams a minimum of
300 mm (12 inches) from laps in base flashing. Prime parapets prior to application of
base flashing and allow to dry. Ensure primer runs onto field a minimum of 200 mm (8
inches). Place into position and remove release film from underside. Affix membrane
and roll smooth to ensure a solid bond.
18.
Thoroughly prime exposed metal prior to installing base flashing membrane. Follow
manufacturer's instructions as to dry time.
19.
Provide reinforcement gusset at inside corners in accordance with membrane
manufacturer.
20.
Cut cap flashings into 1 m (39 inches) wide strips ensuring coverage of cap sheet on
field minimum of 165 mm (6.5 inches) and terminate ends on vertical base sheets
minimum 200 mm (8 inches) above finished roof surface or equal to termination of
base flashing. Ensure cap flashings shall not carried over parapet and terminated on
07 52 00-17
21.
3.4
3.5
I.
Metal Flashings: Install in accordance with SMACNA specifications and/or CRCA FL series
details.
J.
Cold Weather Precautions:
1.
Follow cold weather application guidelines from manufacturer when temperatures are
expected to be below 5 degrees C (40 degrees F). If such guidelines are unavailable
or not known, contact membrane manufacturer for clarification.
2.
During cold weather store roll goods and pail goods in a heated environment and
bring to roof site just prior to use. Unroll and allow SBS rolls to relax fully prior to
installation. Time may vary for this depending on sunlight and air temperature. If in
doubt, call membrane manufacturer for instruction.
SITE QUALITY CONTROL
A.
Site Tests and Inspections:
1.
Consultant may appoint an independent roofing inspection company. Cost of
inspection will be paid from Cash Allowance specified in Section 01 20 00 - Price and
Payment Procedures.
2.
If required by inspection company or by Consultant, make cut tests. Roofing
subcontractor to pay costs of tests and making good roofing after completion of test.
3.
Owner may engage independent inspection company to inspect work of this Section.
Give minimum 2 weeks' notice of starting work and allow inspector free access.
Inspection may include thermography survey of completed roof.
4.
Inspection - Roof Levels:
a.
Before roofing is commenced, inspect and check roof surfaces for levels.
b.
Undertake a series of spot level checks to determine unevenness in roof decks
which may result in pools of water remaining on completed roofing in excess of
13 mm (1/2 inch) depth.
c.
Ensure deck has been inspected and approved by Consultant prior to start of
roofing work.
B.
Non-Conforming Work: Replace damaged work which cannot be satisfactorily repaired,
restored or cleaned, to satisfaction of Consultant at no cost to Owner.
C.
Manufacturer Services: Arrange for membrane manufacturer representative to visit site on
day roofing is commenced and periodically thereafter, to ensure work is properly performed.
Upon completion of work of this Section, ensure manufacturer's representative inspects roof
and verifies quality of work to yield weathertight waterproofing roofing system and issue
manufacturer's warranty. Ensure manufacturer's representative informs Consultant,
Contractor and Subcontractor executing work of this Section promptly in writing when
inspection is complete and provide detailed report.
CLEANING
A.
3.6
the interior face. Apply side laps minimum 150 mm (6 inches) from base side laps and
minimum 150 mm (6 inches) from cap sheet side laps on field. Follow flashing details
as recommended by membrane manufacturer.
Apply gentle heat to a metal trowel and cap sheet where the cap flashing will adjoin.
Cut 45 degree angles into the cap sheet on the leading corners. Slight bleed-out
should evidence a sound seal.
Waste Management: Discard and legally dispose components that cannot be applied within
its stated shelf life to requirements of authorities having jurisdiction.
PROTECTION
A.
Take necessary precautions to protect Owner's property and adjacent properties, including
07 52 00-18
trees, shrubs, buildings, sanitation, water piping, gas piping, electrical service and
miscellaneous cabling from damage which may result from work of this Section.
1.
Provide protection covering out of 13 mm (1/2 inch) [19 mm (3/4 inch)] thick plywood
underlaid with 25 mm (1 inch) thick polystyrene insulation board adhered to it, over
roofed areas when working from, or over, such roof surfaces. Provide such protection
below hoist rigs, ladders, pallets of material and in other circumstances where roofing
membrane is exposed to potential damage. Secure protection boards mechanically
against wind storm loss.
2.
Protect finished wall and roof surfaces against damage of any kind. Protect finished
sheet metal work and membrane flashing against punctures and damage of any kind.
Be responsible for damage sustained by work of this trade. Do not use equipment
over roofing materials which would cause damage to materials in any way.
3.
Protect surrounding work, and adjacent building and other property from damage
during roofing operations, taking particular care to prevent bitumen droppings and
discoloration of surrounding buildings by smoke from kettles. Locate kettles to prevent
smoke entering adjacent and Project buildings.
4.
Use protection covering specified in work areas and along work routes as required to
prevent damage to steel deck, or [sheathing and ]roofing. Ensure workers stay off
newly heat welded membrane until cooled.
5.
Verify no vent pipes venting flammable fumes (i.e. fuel storage tanks) are located in
area of work.
6.
Temporarily block drain pipes during application of roofing membrane. Remove
blocking each night or when work is not in progress and after work of this Section is
completed.
7.
Protect completed portions of roof from damage.
8.
At conclusion of each day's work, seal exposed edges of roof insulation. Remove
when resuming work.
9.
Do not heat weld over or near flammable substrates such as fiberboard.
B.
Fire Protection:
1.
Respect safety measures described in manufacturer's literature as well as local
jurisdictional authorities.
2.
Have a 9 kg (20 lb) dry chemical fire extinguisher acceptable to authorities having
jurisdiction, fully charged and in operable condition at every location where open
flames are used.
3.
During roofing maintain a clean site and keep 2 foam or dry type fire extinguishers on
roof within easy access of heat welding application and in any open flame location
while roofing is in progress.
4.
Verify no vent pipes venting flammable fumes (i.e. fuel storage tanks) are located in
area of work.
5.
Do not have gasoline or other flammable solvents on roof while heat welding.
a.
Be vigilant against self starting fires at end of roofing operations cease for day.
Use a heat detector gun to spot any smoldering or concealed fire. Examine roof
for hot spots one hour after completion of roofing operations, especially at
flashings and around roof penetrations. Alert watchman of such possibilities.
END OF SECTION
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