CONTENTS
SECTION 07321
CLAY ROOF TILES
PART 1
GENERAL
1.1
1.2
1.3
1.4
1.5
1.6
1.7
PART 2
PRODUCTS
2.1
2.2
2.3
2.4
2.5
2.6
2.7
PART 3
Related Documents
Summary
Submittals
Quality Assurance
Delivery Storage and Handling
Project Conditions
Warranty
Manufacturers
Materials
Supporting Steel System
Mortar Materials
Mortar Mixes
Roofing Tile Accessory Items
Extra Stock
EXECUTION
3.1
3.2
3.2
3.3
Examination
Preparation
Installation
Adjust and Clean
Clay Roof Tiles
Celia New Capital Project – Residential Package
Section 07321
Page 1 of 6
SECTION 07321
CLAY ROOF TILES
PART 1
GENERAL
1.1
RELATED DOCUMENTS
Drawings and General Provisions of the Contract, including Contract
Conditions and Specification Sections, apply to work of this Section.
1.2
SUMMARY
1.2.1
Work under this section covers Clay tile roofing,flashing ,and accessories.
Extent of clay roofing tiles is indicated on Drawings.
1.2.2
Related Sections: The following sections include requirements which
relate to this section:
− Division 03;Section"Cast in place concrete".
− Division 04;Section"Unit Masonry".
1.3
SUBMITTALS
1.3.1
Product Data: Submit manufacturer's detailed technical product data,
installation instructions and recommendations, including necessary data to
document that materials comply with requirements.
1.3.2
Samples:
Samples For Initial Selection: Submit full range of samples for colour and
texture selection.
Samples for Verification: for verification purposes, 2 full-size units of each
type roofing tile colour, include similar samples of trim and accessories
involving color selection,style and texture selected For the following
products, in manufacturer's standard sizes:
− Clay Tile: Full size.
− Accessory Tile: Full size, each type.
− Fastenings: Wire-tie system components, 300 mm long.
1.3.3
Material Test Reports: For each type of clay tiles and fastener systems.
1.3.4
Maintenance Data: For roofing to include in maintenance manuals.
1.4
QUALITY ASSURANCE
1.4.1
Reference Standards: Roofing tiles shall be in strict accordance with
ASTM D 1079 and glossary in NRCA's "The NRCA Roofing and
Clay Roof Tiles
Celia New Capital Project – Residential Package
Section 07321
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Waterproofing Manual" for definitions of terms related to roofing work in
this Section
1.4.2
Mock-Up: Construct a 120 x 120 cm mock-up panel with exterior subbase, clay tile colour, style and texture selected to serve as a standard of
quality for both appearance and workmanship for the work.
1.5
DELIVERY STORAGE AND HANDLING
Handle, store, and place roofing materials in a manner to avoid significant
or permanent damage to roof deck or structural supporting members.
Protect unused underlayment from weather, sunlight, and moisture when
left overnight or when roofing work is not in progress.
1.6
PROJECT CONDITIONS
1.6.1
Substrate: Proceed with roofing tile installation only after substrate
construction, vent stacks and other penetrating work have been completed
and when substrate materials are dry.
1.7
WARRANTY
Without depraving the Employer of his rights under the provisions of the
contract, the contractor warrant and agree to repair or replace clay roof
tiles that does not meet requirements during a period of 10 years after date
of substantial completion.
Warranty includes removing and reinstalling, underlayment,waterproofing,
protection and tiles on decks.
PART 2
PRODUCTS
2.1
MANUFACTURERS
The products specified herein are specified for the purpose of establishing
minimum quality standards. Products equal in quality to or better than
those specified may be acceptable subject to the Engineer's approval.
2.2
MATERIALS
2.2.1
Clay Tiles: Imported unglazed tiles.Moulded clay roofing tile units of
double barrel clay tile style from manufacturer standard product
indicated,kiln-fired to vertification,well burnt throughout and free from
surface imperfections,fire cracks,true in shape,dense,tough and when
broken,show a homogenous clean fracture.
Thickness: Tiles shall not be less than 10 mm and more than 15 mm thick.
Dimension: As indicated on drawings and approved sample.
Change in dimensions: shall not exceed 2.5%.
Water absorption: shall not exceed 3 % of weight
Clay Roof Tiles
Celia New Capital Project – Residential Package
Section 07321
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Colour: Provided in colour range to match sample in Company
Representative's office.
2.3
SUPPORTING STEEL SYSTEM
2.3.1
Supporting Steel System: Consist of expanded metal lath covered with a
layer of cement mortar.Metal lath of galvanized steel of weight 1.6
kg/m2,supported on steel framing system capable to support the weight of
top layer including weight of roof tiles in addition to 60kg/m2
2.4
MORTAR MATERIALS
Ingredients for mortar shall be measured in proper clean gauges boxes
2.4.1
Cement: Ordinary Portland cement to ES No.4756
2.4.2
Aggregate: Washed aggregate consisting of natural sand or crushed
stone obtained from an approved source.Comply with ES No.1108.
2.4.3
Water: Clean,fresh,potable,and free of mineral or organic matter.
2.5
MORTAR MIXES
2.5.1
General:
indicated.
2.5.2
Mix Proportions:Mortar mix composed of 300 kg of Portland cement per 1
m3 of sand.Provide mortar color of tile selected.
2.6
ROOFING TILE ACCESSORY ITEMS
2.6.1
Bird stop pieces
2.6.2
Elastomeric Sealant: ASTM C 920, elastomeric polyurethane or silicone
polymer sealant; of type, grade, class, and use classifications required to
seal joints in slate-shingle roofing and remain watertight as per
manufacturer instructions
2.6.3
Waterproofing Paint Installation: Apply water proofing system as per
approved shop drawings for the following types:
Don’t use admixtures,and calcium chrolide unlessotherwise
− Cement based Water proofing
2.7
EXTRA STOCK
Prior to issuance of completion certificate, deliver to the job site for storage
as directed by Engineer, extra stock equal to 3% of each color and
component of all clay roof tile materials used on the project.
PART 3
EXECUTION
3.1
EXAMINATION
Clay Roof Tiles
Celia New Capital Project – Residential Package
Section 07321
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Examine substrate and conditions under which roofing tile work is to be
performed; notify Engineer in writing of unsatisfactory conditions. Do not
proceed with roofing tile work until unsatisfactory conditions have been
corrected.
3.2
PREPARATION
Construct masonry supporting walls of solid cement bricks as specified in
section”Unit Masonry”.
Slopes of the top walls shall be adjusted to the required slopes and levels
to achieve the required finish level as indicated in drawings.
Anchored steel supporting system in position to the masonry walls.
Fix the metal lath above steel supporting system by the galvanized steel
wire to cover the required roof area.
Apply cement mortar on the lath in two coats not less than 30 mmm
thick,as specified in section “Plastering”.
Setting of tiles,laying levels or slopes,and cleaning as per specifications
and drawings.
3.2
INSTALLATION
3.2.1
General: Install roofing tiles in accordance with manufacturer’s
recommendations and details.Roofing tile course shall be at same slope.
Set and fix roof tiles in full bed of mortar,fill exposed end of ridge tile with
mortar.
Cut and fit tile at roof vents and other roof penetrations.After tile are laid,fill
any voids with mortar.
3.2.2
Waterproofing: Apply waterproofing for the following types:
− Modified Cement Waterproofing
Apply waterproofing system as per approved shop drawings
3.2.3
Installation of Accessory Items: Install eave closures, wind locks, and
other accessory items in coordination with roofing tile installation and in
strict accordance with installation instructions and recommendations of
manufacturer.
3.3
ADJUST AND CLEAN
Remove and replace any damaged or broken tile.
Remove excess tile and debris from site.
END OF SECTION 07321
Clay Roof Tiles
Celia New Capital Project – Residential Package
Section 07321
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