Peralta Community College District
501 5th Avenue Oakland, California 94606
Phone (510) 466-7225 Fax (510) 587-7873
Purchasing Department
September 30, 2011
ADDENDUM No. 1
Bid No.: 11-12/08 Roof Replacement Merritt College Building L, Library/Learning Resource
Center
This Addendum modifies the original Bid Documents for the above Bid. Acknowledge receipt
of this addendum in the space provided on the BID FORM. Failure to do so may subject Bidder
to disqualification.
The original Bid Documents are updated by the information as follows:
Bid Form – Addendum No. 1
(Pages 1 of 3)
Specifications 07511 Cold Applied Built Up Roofing W/Title 24 Surfacing
3 Pages
13 Pages
BID QUESTIONS
:
Question 1:
Response:
Please confirm there is no asbestos involved with the roof removal:
There is no asbestos involved with the roof removal.
Question 2:
Please confirm that the slope is in the structure and no taper is required. What is
the type and thickness of insulation to be installed?
No taper is required; refer to Specification Section 07511 for insulation
requirements
Response:
Question 3:
Response:
Who is responsible for the walk pads under sleepers that may be damaged during
removal?
Replace all walk pads under the covered, rigid cable tray.
Question 4:
Response:
Who is responsible for walk pads under sleepers that have not been installed?
If they don’t exist, it is not in your scope.
Question 5:
What is the extent the fiber optic cables can be raised vertically and not be
damaged?
The cable trays should not be raised above their current height.
Response:
Bid No. 11-12/08 - Addendum No. 1
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Page 1 of
BID QUESTIONS (Continued)
Question 6:
Response:
Question 7:
Response:
Question 8:
Response:
Question 9:
Response:
:
The Division 07 Section 07511, Cold Applied Built Up Roofing, is missing in the
specs book.
Specification Section 07511, Cold Applied Built Up Roofing with Title 24
Surfacing, is hereby provided.
Is this a warranted job? If so, what is the duration for the manufacturer and
contractor warranty?
Refer to Specification Section 07511.
Are we to use the same waterproofing material on both the coping stone and the
decking which serves as the building entryway roof?
Yes.
Are we to fill the void between the coping stone and the roof deck before metal
flashing is installed; if so, with what?
Refer to Specification Section 07511.
DISTRICT CLARIFICATIONS
:
1. The approximately 4’ in diameter conical antenna on top of the east penthouse is
abandoned equipment. It has no cable connection through the roof and is held down by
concrete blocks. Contractor will remove and properly dispose of the antenna, concrete
blocks, and other related items.
2. All existing stored and related construction material on the roof will be removed by the
District prior to the start of work.
3. Debris boxes can be located by contractor: a) at the building entrance (southwest side of
building), and b) near the southeast end of the lower roof. Specific locations must be
approved by the District prior to their installation. Enclosed shoots must be utilized.
4. All other terms and conditions of BID No. 11-12/08 to remain the same.
Bid No. 11-12/08 - Addendum No. 1
18
Page 2 of
Peralta Community College District
BID FORM (Page 1 of 3)
Bid No.: 11-12/08 - Roof Replacement Merritt College Building L, Library/ Learning Center
The undersigned having carefully examined the location of the proposed work, the local conditions of
the place where the work is to be done, the Invitation for Bid, the General Conditions and Instructions
to Bidders, the Peralta Community College District (District) Contract, the Specifications and all of the
contract documents for this project, and accurately completed the Vendor’s Questionnaire, proposes to
perform the contract, including all of its component parts, and to furnish any and all required labor,
materials, equipment, insurance, permit, bonding, transportation and services required for the
construction of the project in strict conformity with the plans and specifications prepared, including
any Addenda, within the time specified for the lump sum price of (including all taxes):
Total Bid Price
Total lump sum bid price of
$
__ (Numeric amount)
_____________________________________________________________________(Written amount)
Written amount prevails if any discrepancy exists.
Bid Elements (This Total Bid Price is composed of the following elements)
Item
Description
1
Roof Replacement Merritt College Building L
2
All Allowances ( Cost contained in Allowance, see page 3 of this bid form)
3
All Unit Pricing (see page 3 of this bid form)
4
Deductive Alternate for extra work related to the presence of the AT&T a)
partially-completed cable trays and loose coiled cable on the main roof, b)
similar heavy-duty cable trays on each penthouse, c) re-roofing up to the four
cell equipment support bases, and d) weather protecting the building area around
the void created by these four cell equipment support bases while re-roofing to
them.
Amount
Total (equating to the Total Bid Price value shown above)
Peralta Community College District reserves the right to award a contract to multiple Contractors,
based on the lowest responsive, responsible bid, for each Bid Element, or to award the entire bid to
the lowest responsive, responsible bidder, depending on which best serves the interests of the
District.
Bid No. 11-12/08 - Addendum No. 1
18
Page 3 of
BID FORM (Page 2 of 3)
Bid No.: 11-12/08 - Roof Replacement Merritt College Building L, Library/ Learning Center
Agreement Terms
1.
If awarded the contract, the undersigned hereby agrees to sign said contract and furnish the necessary Payment Bond,
Performance Bond, and Certificates of Insurance within 10 calendar days after the Notice of the Award of this contract
and agrees to commence construction within 10 calendar days after the Notice to Proceed is issued by the District.
2.
The undersigned has checked carefully all the above figures and understands that the District will not be responsible for
any errors or omissions on the part of the undersigned in making up this bid.
3.
Peralta Community College District reserves the right to reject any or all bids, to waive any irregularities or
informalities not affected by law, to evaluate the bids submitted and to award the contract according to the proposal
which best serves the interests of the District.
4.
All pages of this Bid Form must be completed and signed in ink. The bid will be awarded to the lowest responsive,
responsible bidder.
Contractor Name:
____________________________________________________
Initials:
______________
Bid Bond
Each bid shall be accompanied by a cashier's check payable to the Peralta Community College District, or a bidder's bond
executed by an admitted surety insurer, licensed to do business in the State of California as a surety, made payable to the Peralta
Community College District in an amount not less than ten percent (10%) of the maximum amount of the bid. The check or bid
bond shall be given as a guarantee that the bidder to whom the contract is awarded shall execute the contract documents and shall
provide the required payment and performance bonds as specified therein within ten (10) days after the notification of the award
of the contract. .
Amount – Bidders must enclose an amount of not less than 10 percent of the entire bid as either:
_____ Cashier's Check: Check Number: _____________________________________________
Issuing Bank: ___________________________________________________
Amount: $______________________________________________________
_____ Bidder’s Bond: Surety Company: _____________________________________________
Addendum Acknowledgement
The following addendum(s) are acknowledged in this bid: _________________________
Bidder Information and Signature
Contractor Name:
______________________ Title:
Contact Person (print name):________________________________________________________
Address:
______________________________________________________________________________
Bid No. 11-12/08 - Addendum No. 1
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Page 4 of
BID FORM (Page 3 of 3)
Bid No.: 11-12/08 - Roof Replacement Merritt College Building L, Library/ Learning Center
Telephone:
________________________________
Fax: ____________________________________
Contractor License #: _________________________
Expiration Date: __________________________
Authorized Signature: __________________________________________
Date: ___________________
ALLOWANCES
All allowances shall be used at the discretion of the District. Any allowances not approved through a formal change order
procedure shall be credited back to the District as a deductive change order. Contractor shall be aware that all allowances are for
work not included in the base bid work as called out, specified or shown on the contract documents.
No.
AL-01
Description
Miscellaneous repair at deck
Amount
$30,000
Type
LS
$___30,000___________
UNIT PRICING
All unit pricing shall include all General Conditions, General Requirements, Overhead & profit.
Contractor shall also include scaffolding or other lift devices where required. Contractor shall be aware that this unit
pricing is for work outside of all work required under the base bid work – all costs for work shown in the contract
documents shall be included in the base bid price.
No
Description
UP-01
Caulking of horizontal crack at existing
concrete slabs under roof, assume ½” wide; per
lineal foot.
Amount of
Units
Price per Unit
Total Amount
$
$
$________________
(place amt on line 3 of bid
form)
Contractor Name:_____________________________________________Initials:
Bid No. 11-12/08 - Addendum No. 1
18
__________
Page 5 of
ADDENDUM #1
Bid No.: 11-12/08 - Roof Replacement Merritt College Building L, Library/ Learning Center
SECTION – COLD APPLIED BUILT UP ROOFING WITH TITLE 24 SURFACING
PART 1 GENERAL
1.1
RELATED DOCUMENTS
A. Drawings and general provisions of the contract, including General and Supplementary Conditions
and Division 1 specifications, apply to this section
SUMMARY:
A.
This Section includes the following:
1.
2.
3.
4.
5.
6.
7.
B.
1.2
A.
1.3
High Strength Cold-process built-up asphalt roofing system
New insulation: Two [2] layers, bottom layer [1] set in low rise foam and [1] recover
board set in low rise foam.
Flashings on penetrations, projects and vent stacks.
Project specific details. See fixed sleeper detail and perimeter baseflashing.
Installation of Title 24 /CRRC approved aggregate surfacing.
Miscellaneous work as directed.
Waterproof concrete deck area.
Related Sections include the following:
1.
Division 6 Section Carpentry for wood nailers, cants, curbs, and blocking.
2.
Division 7 Section "Sheet Metal Flashing and Trim"
DEFINITIONS
Roofing Terminology: Refer to ASTM D 1079 and glossary of NRCA's "The NRCA Roofing
and Waterproofing Manual" for definition of terms related to roofing work in this Section.
PERFORMANCE REQUIREMENTS
A.
General: Provide installed roofing membrane and base flashings that remain watertight; do not
permit the passage of water; and resist specified uplift pressures, thermally induced movement,
and exposure to weather without failure.
B.
Material Compatibility: Provide roofing materials that are compatible with one another under
conditions of service and application required, as demonstrated by roofing manufacturer based
on testing and field experience.
Bid No. 11-12/08 - Addendum No. 1
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C.
FMG Listing: Provide roofing membrane, base flashings, and component materials that comply
with requirements in FMG 4450 and FMG 4470 as part of a roofing system and that are listed in
FMG's "Approval Guide" for Class 1 or noncombustible construction, as applicable. Identify
materials with FMG markings.
1.
2.
D.
1.4
Fire/Windstorm Classification: Class 1A-60.
U.L. Class A fire rating
Flashings: Comply with requirements of Division 7 Section “Sheet Metal Flashing and Trim.”
Provide base flashings, perimeter flashings, detail flashings and component materials that
comply with requirements and recommendations of the following:
1.
FMG 1-49 Loss Prevention Data Sheet for Perimeter Flashings.
2.
FMG 1-29 Loss Prevention Data Sheet for Above Deck Roof Components.
3.
NRCA Roofing and Waterproofing Manual (Fifth Edition) for construction details.
4.
SMACNA Architectural Sheet Metal Manual (Fifth Edition) for construction details.
SUBMITTALS
A.
Product Data: For each type of product indicated.
B.
Shop Drawings: For roofing system.
attachments to other Work.
1.
2.
Include plans, elevations, sections, details, and
Base, perimeter, and detail flashings, cants, and membrane terminations.
Crickets, saddles, and tapered edge strips, including slopes.
C.
Samples for Verification: For the following products:
1.
12-by-12-inch square of base sheet.
2.
12-by-12-inch square of ply sheet.
3.
12-by-12-inch square of flashing sheet.
4.
10 lb of aggregate ballast in color and gradation indicated.
D.
Installer Certificates: Signed by roofing system manufacturer certifying that Installer is
approved, authorized, or licensed by manufacturer to install roofing system.
E.
Manufacturer Certificates: Signed by roofing manufacturer certifying that roofing system
complies with requirements specified in "Performance Requirements" Article.
1.
Submit evidence of meeting performance requirements.
F.
Qualification Data: For Installer, manufacturer, and manufacturer’s technical representative.
G.
Product Test Reports: Based on evaluation of comprehensive tests performed by manufacturer
and witnessed by a qualified testing agency, for components of roofing system.
H.
Maintenance Data and Training Materials:
manuals and Owner’s training library.
I.
Warranties: Special warranties and service agreements specified in this Section.
Bid No. 11-12/08 - Addendum No. 1
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For roofing system to include in maintenance
Page 7 of
J.
Manufacturer Approval of Testing Agency: Manufacturer’s letter indicating acceptance of
qualifications of testing agency to perform inspections specified under Part 3 Article “Field
Quality Control,” including manufacturer’s compliance with testing agency’s requirements for
final roofing inspection and manufacturer’s warranty certification.
K.
Inspection Reports: Copy of daily and final technical inspection reports of roofing installation.
1.5
QUALITY ASSURANCE
A.
Installer Qualifications: A qualified firm that is approved, authorized, or licensed by
roofing system manufacturer to install manufacturer's product and that is eligible to
receive manufacturer's warranty. Contractor must provide written support
documentation to demonstrate to the PCCD that they have successfully completed and
installed like same system as specified in similar installations, with a focus on educational
environment, complexity of project and overall safety of the occupants,/students /staff.
Contractor to provide PCCD a list of three [3] references with contact name and number
to confirm that they have completed no less than one [1] Tremco project per year for the
last three [3] years.
B.
Manufacturer Qualifications: A qualified manufacturer that has UL listing and FMG approval
for roofing system identical to that used for this Project.
1.
Manufacturer’s Technical Representative Qualifications: An individual experienced in
the installation and maintenance of the specified roofing system and qualified to
determine Installer’s compliance with the requirements of this section.
C.
Testing Agency Qualifications: An independent testing agency with the experience and
capability to conduct the testing indicated, as documented according to ASTM E 548.
D.
Source Limitations: Obtain components for roofing system from or approved by roofing system
manufacturer.
E.
Fire-Test-Response Characteristics: Provide roofing materials with the fire-test-response
characteristics indicated as determined by testing identical products per test method below by
UL, FMG, or another testing and inspecting agency acceptable to authorities having jurisdiction.
Materials shall be identified with appropriate markings of applicable testing and inspecting
agency. Fire rating: U.L. Class A .
F.
Pre-installation Conference: Conduct conference at Project site. Comply with requirements in
Division 1 Section "Project Management and Coordination." Review methods and procedures
related to roofing system including, but not limited to, the following:
1.
2.
3.
Meet with Owner, Architect, Owner's insurer if applicable, testing and inspecting agency
representative, roofing Installer, roofing system manufacturer's representative, and
installers whose work interfaces with or affects roofing including installers of roof
accessories and roof-mounted equipment.
Review methods and procedures related to roofing installation, including manufacturer's
written instructions.
Review and finalize construction schedule and verify availability of materials, Installer's
personnel, equipment, and facilities needed to make progress and avoid delays.
Bid No. 11-12/08 - Addendum No. 1
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4.
5.
6.
7.
8.
1.6
Examine deck substrate conditions and finishes for compliance with requirements,
including flatness and fastening.
Review structural loading limitations of roof deck during and after roofing. flashings,
special roofing details, roof drainage, roof penetrations, equipment curbs, and condition
of other construction that will affect roofing system.
Review governing regulations and requirements for insurance and certificates if
applicable.
Review temporary protection requirements for roofing system during and after
installation.
Review roof observation and repair procedures after roofing installation.
DELIVERY, STORAGE, AND HANDLING
A.
Deliver roofing materials to Project site in original containers with seals unbroken and labeled
with manufacturer's name, product brand name and type, date of manufacture, and directions for
storage.
B.
Store liquid materials in their original undamaged containers in a clean, dry, protected location
and within the temperature range required by roofing system manufacturer. Protect stored
liquid material from direct sunlight.
1.
Discard and legally dispose of liquid material that cannot be applied within its stated
shelf life.
C.
Protect roof insulation materials from physical damage and from deterioration by sunlight,
moisture, soiling, and other sources. Store in a dry location. Comply with insulation
manufacturers written instructions for handling, storing, and protecting during installation.
D.
Handle and store roofing materials and place equipment in a manner to avoid permanent
deflection of deck.
1.7
A.
1.8
A.
PROJECT CONDITIONS
Weather Limitations: Proceed with installation only when existing and forecasted weather
conditions permit roofing system to be installed according to manufacturer's written instructions
and warranty requirements.
WARRANTY
Special Warranty: Manufacturer's standard warranty form, without monetary limitation, in
which manufacturer agrees to repair or replace components of roofing system that fail in
materials or workmanship within specified warranty period. Failure includes roof leaks.
1.
Special warranty includes roofing membrane, baseflashings, roofing membrane
accessories, roof insulation, fasteners, cover boards, substrate board, and other
components of roofing system, whether manufactured by or approved by the
manufacturer for Twenty [20] years from date of Substantial Completion.
Bid No. 11-12/08 - Addendum No. 1
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B.
Maintenance Service Agreement: Manufacturer’s standard form, in which manufacturer agrees
to provide the following service for the roof system during the second, fifth and tenth year of the
warranty period specified above:
1.
Inspection of the roof membrane and associated roofing system components listed above
by a manufacturer’s technical service representative.
2.
Report of inspection documenting roofing conditions.
3.
Routine preventive maintenance and repairs to damage to the roof system, excluding such
damage to the roof system excluded from the warranty and service agreements as a result
of neglect, negligence, vandalism or other excluded cause as described in manufacturer’s
published terms and conditions at the date of this contract.
4.
General rooftop housekeeping and cleanup, subject to limits, but generally including
removal of incidental debris.
5.
Special Project Warranty: Submit roofing Installer's warranty, on warranty form at end
of this Section, signed by Installer, covering Work of this Section, including all
components of roofing system such as roofing membrane, base flashing, roof insulation,
fasteners, cover boards, substrate boards, vapor retarders, roof pavers, and walkway
products, for the following warranty period: years from date of Substantial Completion.
C. Special project warranty: Submit roofing installers warranty, on warranty form at end of this
section, signed by installer, covering work of this section, including all components of the
membrane roofing system such as membrane, baseflashing , roof insulation, fasteners, walkway
products, for the following warranty period:
1. Warranty period: Two [2] years from date of substantial completion
PART 2 - PRODUCTS
2.1
A.
MANUFACTURERS
Basis-of-Design Product: Product requirements in this section are based upon Tremco, Inc.
products named in other Part 2 articles. Subject to compliance with requirements, provide the
named product or an approved comparable product by one of the following:
1.
2.2
Cold-Process Built-up Asphalt Roofing with Energy Star/Cool roof surfacing by Tremco
is the basis of design.
BASE-/ FINISHING SHEET MATERIALS
A.
Base Sheet: Asphalt-coated with polyester/glass scrim/glass mat trilaminate ply sheet,
complying with ASTM D 4601, with the following minimum properties:
1.
Tensile Strength per ASTM D 5147: MD145 lbf/in and XD 135 lbf/in
2.
Weight: 38.0 lb/100 ft
3.
Tear strength: per ASTM D 5147 : MD 225 lbf and XD 190 lbf
B.
ROOFING MEMBRANE PLIES: Asphalt-coated fiberglass ply sheet, complying with
ASTM D 4601, with the following minimum properties:
1.
Breaking Strength: per ASTM D 146-78: 90 lbf/in MD and 70 lbf/in XMD
Bid No. 11-12/08 - Addendum No. 1
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2.
C.
Weight: 33.0 lb/100 ft meeting ASTM D 228
FINISHING SHEET: Fire resistant, smooth surfacing modified bitumen membrane, compatible
with SBS/SEBS elastomers, meeting ASTM D 6163, Type II, Grade S
1. Tear strength: per ASTM D 5147 : MD 210 lbf and XD 210 lbf
2.3
A.
FLASHING MATERIALS
Baseflashing: Fire rated, weathering membrane with a factory applied, white, reflective coating
meeting ASTM D6162-00 type III, Grade G, meeting the following minimum properties:
1.
Color: White.
2.
Tensile Strength : 318 lbf/in MD, 349 lbf/inXMD
3.
Elongation : 10%
4.
Tear Strength : 475 lbf/in MD, 478 lbf/in XMD.
B.
Backer sheet: Asphalt coated with polyester/glass scrim mat trilaminate ply sheet complying
with ASTM D 4601, with the following minimum properties:
1.
Tensile Strength 145 lbf/in MD, 135 lbf/in XMD
2.
Tear Strength: 225 lbf MD, and 190 XMD
2.4
ASPHALT MATERIALS
A.
Water based Primer: ASTM D 41. Tremprime WB and SP Primer.
B.
Cold-Applied Adhesive: Roofing system manufacturer's asphalt-based, 1-part asbestos-free,
cold-applied adhesive specially formulated for compatibility and use with modified bitumen
membranes. Provide adhesive in containers labeled with UL and FMG logos indicating material
was manufactured under UL and FMG quality assurance programs.
2.5
AUXILIARY ROOFING MEMBRANE MATERIALS
A.
General: Auxiliary materials recommended by roofing system manufacturer for intended use
and compatible with built-up roofing.
B.
Mastic Sealant: Polyisobutylene, plain or modified bitumen, nonhardening, nonmigrating,
nonskinning, and nondrying.
C.
Fasteners: Factory-coated steel fasteners and metal or plastic plates meeting corrosionresistance provisions in FM 4470; designed for fastening roofing membrane components to
substrate; tested by manufacturer for required pullout strength; and acceptable to roofing system
manufacturer.
D.
Metal Flashing Sheet: Metal flashing sheet is specified in Division 7 Section "Sheet Metal
Flashing and Trim."
E.
Aggregate Surfacing: Hardness: 5.0 Mohs, Specific Gravity: 2.86. Clean, dry, opaque, waterworn gravel or crushed stone, free of sharp edges. Color: White, highly reflective. Rock to be
used in conjunction with “Rock it” Adhesive. Rock it Adhesive: White, Asbestos free,
Bid No. 11-12/08 - Addendum No. 1
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elastomeric, low volatile surfacing. Density: ASTM D 6511, 4.5 lbs/gal. Reflectance: ASTM
C1549, 70.6%, Thermal emittance: ASTM C1371, .85.
F.
Miscellaneous Accessories:
system manufacturer.
G.
Hypalon flashing sheet: 45 mil, CSPE membrane reinforced with polyester scrim, white in
color.
H.
Single ply flashing adhesive: One [1] part modified asphalt flashing adhesive specifically
designed for use with the Hypalon product.
I.
Concrete waterproofing liquid: Fibrated, elastomeric waterproofing system. Color chosen by
owner.
J.
Walk pads: 3’ x 4’ x 3/8 inch thick, granulated asphaltic pad.
2.6
Provide miscellaneous accessories recommended by roofing
INSULATION/ACCESSORIES
A.
General: Roof insulation accessories recommended by insulation manufacturer for intended use
and compatible with membrane roofing.
B.
Fasteners: Factory-coated steel fasteners and metal or plastic plates meeting corrosionresistance provisions in FMG 4470, designed for fastening roof insulation to substrate, and
acceptable to roofing system manufacturer.
C.
Wood Nailer Strips and Cants: Comply with requirements in Division 6 Section "Miscellaneous
Carpentry."
D.
Tapered Edge Strips: ASTM C 208, Type II, Grade 1, cellulosic-fiber insulation board.
E.
Fiberboard insulation: ASTM C 208 Type II, grade 1, wood fiber, asphalt impregnated,
chemically treated for deterioration. Thickness : ½ inch. Temple Inland or equal
F.
Isocyanurate Insulation: ASTM 1289, Type II, Class 1, Grade 2, closed cell isocyanurate foam
core laminated on both sides, fiber reinforced, non asphaltic facer. Thickness: 1.5 inches. Trisotech or equal.
G.
Insulation adhesive: Low rise foam: Two [2] component, solvent elastomeric urethane adhesive.
EXECUTION
3.1
EXAMINATION
A.. Examine substrates, areas, and conditions, with Installer present, for compliance with the
following requirements and other conditions affecting performance of roofing system:
1.
Verify that roof openings and penetrations are in place and set and braced and that roof
drains are securely clamped in place.
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2.
3.
4.
5.
3.2
Verify that cants, blocking, curbs, and nailers are securely anchored to roof deck at
penetrations and terminations and that nailers match thicknesses of insulation.
Verify that concrete curing compounds that will impair adhesion of roofing components
to roof deck have been removed.
Verify that concrete substrate is visibly dry and free of moisture.
Proceed with installation only after unsatisfactory conditions have been corrected.
PREPARATION
A.
Clean substrate of dust, debris, moisture, and other substances detrimental to roofing installation
according to roofing system manufacturer's written instructions. Remove sharp projections.
B.
Prevent materials from entering and clogging roof drains and conductors and from spilling or
migrating onto surfaces of other construction. Remove roof-drain plugs when no work is taking place
or when rain is forecast.
3.3
INSULATION INSTALLTION
A.
Coordinate installing the roofing system components so insulation is not exposed to precipitation
or left exposed at the end of the workday
B.
Comply with roofing manufactures written instructions for installing roof insulation.
C. Install bottom layer of insulation the to deck using low rise foam adhesive specifically designed a
for fastening specified board –type roof insulation to deck. Walk board into place and weight down as
required for initial grab.
1. Fasten first layer of insulation according to FMG’s Approval guide for specified Windstorm
Resistance.
2. Fasten first layer to resist uplift at corners, perimeter and field.
3. Fasten second layer, set in low rise foam as directed by manufacturers requirements. Stagger joints
with no height elevation between boards of 1/8th inch.
3.4
ROOFING – GENERAL REQUIREMENTS
A.
Install built-up roofing membrane system according to roofing system manufacturer's written
instructions and applicable recommendations of ARMA/NRCA's "Quality Control Guidelines
for the Application of Built-up Roofing."
B.
Start installation of built-up roofing membrane in presence of roofing system manufacturer's
technical personnel.
C.
Cooperate with testing and inspecting agencies engaged or required to perform services for
installing built-up roofing system.
D.
Coordinate installing roofing system components so insulation and roofing membrane sheets are
not exposed to precipitation or left exposed at the end of the workday or when rain is forecast.
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1.
2.
3.
Provide tie-offs at end of each day's work to cover exposed roofing membrane sheets and
insulation with a course of coated felt set in roofing cement with joints and edges sealed.
Complete terminations and base flashings and provide temporary seals to prevent water
from entering completed sections of roofing system.
Remove and discard temporary seals before beginning work on adjoining roofing.
E.
Cold Process Asphalt Heating
1.
An in-line heat exchange unit may be used to facilitate application
a.
Do not exceed maximum adhesive temperature of 100 F.
2.
Heat exchange unit:
Use heat transfer oil approved by heating equipment
manufacturer.
3.
Follow operation procedures recommended by heating equipment manufacturer.
F.
Substrate-Joint Penetrations: Prevent roofing asphalt from penetrating substrate joints, entering
building, or damaging roofing system components or adjacent building construction.
3.5
ROOFING MEMBRANE INSTALLATION
A.
Install one lapped course of base sheet, extending sheet over and terminating beyond cants.
Attach base sheet as follows: Set base sheet over insulation in a continuous application of cold
adhesive @ the rate of two [2] gallons per 100 square feet.
B.
Ply Sheet: Install two [2] ply sheets. shingle style, starting at low point of roofing system.
Offset laps from laps of preceding ply sheets and align cap sheet without stretching. Lap in
direction to shed water. Extend ply sheets over and terminate beyond cants.
1.
Embed ply sheet in a solid application of cold fluid-applied adhesive applied at rate
required by roofing system manufacturer. Rate shall be two [2] gallons per 100 square
feet.
C.
Finishing sheet: install finishing sheet, starting at the low point of the roof, set in a continuous
application of cold adhesive at the rate of 1.5 gallons per 100 square feet.
D.
Aggregate Surfacing: Allow thirty [30] days cure time after installing and testing roofing
membrane, base flashing, and stripping, Apply cold fluid-applied adhesive “Rock it” over roof
surface at 5gal/100 sq. ft. Immediately broadcast 250lb/100 sq. ft. of new aggregate into
adhesive.
3.6
FLASHING AND STRIPPING INSTALLATION
A.
Install base flashing over cant strips and other sloping and vertical surfaces, at roof edges, and at
penetrations through roof, and secure to substrates according to roofing system manufacturer's
written instructions and as follows:
1.
Flashing Sheet Application: Adhere flashing sheet to substrate in flashing adhesive at
rate required by roofing system manufacturer.
B.
Extend base flashing up walls or parapets a minimum of 12 inches above roofing membrane and
6 inches onto field of roofing membrane.
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C.
Mechanically fasten top of base flashing securely at terminations and perimeter of roofing.
D.
Install stripping, according to roofing system manufacturer's written instructions, where metal
flanges and edgings are set on built-up roofing.
1.
Flashing-Sheet Stripping: Install flashing-sheet stripping by heat welding and extend
onto roofing membrane.
E.
Roof Drains: Set 30-by-30-inch metal flashing in bed of asphalt roofing cement on completed
roofing membrane. Cover metal flashing with stripping and extend a minimum of 4 inches
beyond edge of metal flashing onto field of roofing membrane. Clamp roofing membrane,
metal flashing, and stripping into roof-drain clamping ring.
1.
Install flashing-sheet stripping by same method as installing base flashing.
2.
Overflows: Remove and replace [e] lead flashing with new 4lb lead and strip in as
specified.
3.7
JOB SPECIFIC DETAILS
A. Coping: install per: Division 7 Sheetmetal and flashing section
B Vent stacks: Furnish and install new 4lb.lead flashing and strip in as specified.
C. Flashing @ fixed sleepers on steam lines: See Division 7 Sheetmetal, Install Hypalon membrane
baseflashing as specified directly to existing membrane set in adhesive. New GSM sleeper caps to remain
in place.
D. Baseflashings: Furnish and install two [2] ply baseflashings at all walls, curbs, etc. Mechanically
top of flashing eight [8] inches O.C.
E. Counterflashings @ building walls: Install two [2] basflashing as specified. See Division 7
Sheetmetal
F. Raised Metal edge Furnish and install [n] twenty two [22] gauge continuous cleat and secure.
Furnish and install [n] raised metal edge and secure three [3] inches O.C. on interior flange. Strip in with
two [2] ply baseflashing. See Division & Sheetmetal.
G. Support bases [cell equipment platform, etc]: Furnish and install 4lb lead flashings with flange on
base. Set primed flange into a bed of mastic. Strip top of primed flange into new roof membrane. Clamp
and caulk top of flashing.
H. Baseflashing @ perimeter/coping stones: Furnish and in install [n] “L” metal Secure base flange
to decking. Secure top of L metal at mid point on coping stone. Furnish and fill void behind new metal
with batt insulation. Furnish and install [n] two [2] ply baseflashing and secure top with termination bar
into top edge of L metal. Furnish and install [n] SMCF GSM directly below top edge of interior face of
coping stone. Set metal in flashing tape. Secure eight [8] inches O.C. with washered fasteners. Caulk to
seal top of flashing. Tool for maximum adhesion.
I Granulated walk pads: Furnish and install new 3’ x 4’ x 3/8 asphaltic walk pads. Pattern shall be
from one [1] penthouse building access door, directly across the roof in a straight line to other penthouse
building access door. Space walk pads a minimum of four [4] inches apart to not block the passing of
water to the drains.
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J. Waterproofing of concrete deck: Waterblast /airblast [e] deck to remove all dirt, debris and non
adhered materials. Primer base,, walls [to exterior edge] with specified primer @ the rate of ½ gallon per
100 square feet. Apply fibrated elastomeric coating system at the rate of one [1] gallon per 100 square
feet. Two coats required at this rate. Extend coating system up interior-side walls a minimum of four [4]
inches, and on exterior curb out to the far edge on top. Wire wheel base of railing to remove rust. Prime
and apply a bed of sealant around base to seal. In-fill to be level with top of curb.
3.8
FIELD QUALITY CONTROL
A.
Manufacturer’s Technical Representative: Contractor will engage a qualified manufacturer’s
technical representative acceptable to Owner for a minimum of two [2] full-time days on site to
perform roof tests and inspections and to prepare test reports
B.
Test Cuts: Before flood coating and surfacing built-up roofing membrane, test specimens will
be removed to evaluate problems observed during quality-assurance inspections of roofing
membrane as follows:
1.
Approximate quantities of components within roofing membrane will be determined
according to ASTM D 3617.
2.
Test specimens will be examined for interply voids according to ASTM D 3617 and to
comply with criteria established in Appendix 3 of ARMA/NRCA's "Quality Control
Guidelines for the Application of Built-up Roofing."
C.
Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect
roofing installation on completion and submit report to Architect.
1.
Notify Architect or Owner 48 hours in advance of date and time of inspection.
D.
Repair or remove and replace components of roofing system where test results or inspections
indicate that they do not comply with specified requirements.
E.
Additional testing and inspecting, at Contractor's expense, will be performed to determine
compliance of replaced or additional work with specified requirements.
3.9
PROTECTING AND CLEANING
A.
Protect roofing system from damage and wear during remainder of construction period. When
remaining construction will not affect or endanger roofing, inspect roofing for deterioration and
damage, describing its nature and extent in a written report, with copies to Architect and Owner.
B.
Correct deficiencies in or remove roofing system that does not comply with requirements, repair
substrates, and repair or reinstall roofing system to a condition free of damage and deterioration
at time of Substantial Completion and according to warranty requirements.
C.
Clean overspray and spillage from adjacent construction using cleaning agents and procedures
recommended by manufacturer of affected construction.
SECTION CONTINUES ROOFING INSTALLER'S WARRANTY
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A.
WHEREAS <Insert name> of <Insert address>, herein called the "Roofing Installer," has
performed roofing and associated work ("work") on the following project:
1.
2.
3.
4.
5.
6.
7.
8.
Owner: <Insert name of Owner.>
Address: <Insert address.>
Building Name/Type: <Insert information.>
Address: <Insert address.>
Area of Work: <Insert information.>
Acceptance Date: <Insert date.>
Warranty Period: <Insert time.>
Expiration Date: <Insert date.>
B.
AND WHEREAS Roofing Installer has contracted (either directly with Owner or indirectly as a
subcontractor) to warrant said work against leaks and faulty or defective materials and
workmanship for designated Warranty Period,
C.
NOW THEREFORE Roofing Installer hereby warrants, subject to terms and conditions herein
set forth, that during Warranty Period he will, at his own cost and expense, make or cause to be
made such repairs to or replacements of said work as are necessary to correct faulty and
defective work and as are necessary to maintain said work in a watertight condition.
D.
This Warranty is made subject to the following terms and conditions:
1.
Specifically excluded from this Warranty are damages to work and other parts of the
building, and to building contents, caused by:
a.
b.
c.
d.
e.
f.
g.
2.
3.
4.
Lightning
Peak gust wind speed exceeding 70 mph
Fire;
Failure of roofing system substrate, including cracking, settlement, excessive
deflection, deterioration, and decomposition;
Faulty construction of parapet walls, copings, chimneys, skylights, vents,
equipment supports, and other edge conditions and penetrations of the work;
Vapor condensation on bottom of roofing; and
Activity on roofing by others, including construction contractors, maintenance
personnel, other persons, and animals, whether authorized or unauthorized by
Owner.
When work has been damaged by any of foregoing causes, Warranty shall be null and
void until such damage has been repaired by Roofing Installer and until cost and expense
thereof have been paid by Owner or by another responsible party so designated.
Roofing Installer is responsible for damage to work covered by this Warranty but is not
liable for consequential damages to building or building contents resulting from leaks or
faults or defects of work.
During Warranty Period, if Owner allows alteration of work by anyone other than
Roofing Installer, including cutting, patching, and maintenance in connection with
penetrations, attachment of other work, and positioning of anything on roof, this
Warranty shall become null and void on date of said alterations, but only to the extent
said alterations affect work covered by this Warranty. If Owner engages Roofing
Installer to perform said alterations, Warranty shall not become null and void unless
Roofing Installer, before starting said work, shall have notified Owner in writing,
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5.
6.
7.
E.
showing reasonable cause for claim, that said alterations would likely damage or
deteriorate work, thereby reasonably justifying a limitation or termination of this
Warranty.
During Warranty Period, if original use of roof is changed and it becomes used for, but
was not originally specified for, a promenade, work deck, spray-cooled surface, flooded
basin, or other use or service more severe than originally specified, this Warranty shall
become null and void on date of said change, but only to the extent said change affects
work covered by this Warranty.
Owner shall promptly notify Roofing Installer of observed, known, or suspected leaks,
defects, or deterioration and shall afford reasonable opportunity for Roofing Installer to
inspect work and to examine evidence of such leaks, defects, or deterioration.
This Warranty is recognized to be the only warranty of Roofing Installer on said work
and shall not operate to restrict or cut off Owner from other remedies and resources
lawfully available to Owner in cases of roofing failure. Specifically, this Warranty shall
not operate to relieve Roofing Installer of responsibility for performance of original work
according to requirements of the Contract Documents, regardless of whether Contract
was a contract directly with Owner or a subcontract with Owner's General Contractor.
IN WITNESS THEREOF, this instrument has been duly executed this <Insert day> day of
<Insert month>, <Insert year>.
1.
2.
3.
Authorized Signature: <Insert signature.>
Name: <Insert name.>
Title: <Insert title.>
END OF SECTION 07511
End of Addendum
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