A_-_26-03-ITB_-_EXHIBIT_E_-_Section_073213_-_Clay_Roof_Tiles.pdf
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- Attached to
- Police Department Tile Roof Replacement
- Solicitation number
- 26-03-ITB
- Issued by
- Indian River County, Florida
About this file
This document is a technical specification section from the City of Sebastian Police Department Tile Roof Replacement project in Sebastian, Florida. The specification details the materials, products, and installation requirements for clay roof tile replacement at the police department facility located at 1201 Main Street. The project scope includes complete removal and replacement of the existing clay barrel tile roof with new clay barrel tile roofing, along with waterproofing repairs for rooftop units on the low-sloped roof sections. The specifications require ASTM C1167 molded or extruded clay roof tiles in a high-profile Spanish or "S" shape configuration with Type I rating, designed to withstand wind speeds of 176 mph (Vult) and 137 mph (Vasd). The tiles must match existing dimensions, feature a matte smooth finish, and be colored with a 60 percent clay, 20 percent red, and 20 percent brown blend, subject to owner approval prior to ordering.
The specification establishes comprehensive material and installation standards for underlayment, metal flashing, fasteners, accessories, and installation procedures. Required materials include ASTM D226/D226M Type II asphalt-saturated felt underlayment, rigid plastic ridge vents, asphalt roofing cement, butyl and elastomeric sealants, hot-dip galvanized steel fasteners, stainless steel or zinc-tin alloy-coated metal flashing, and mortar conforming to ASTM C270 Type M specifications. Installation requirements mandate compliance with manufacturer instructions and industry standards including recommendations from NRCA's Roofing Manual and TRI/WSRCA's Concrete and Clay Roof Tile Design Criteria Installation Manual. The specification requires uniform tile exposure and coursing throughout, proper fastening using nails or wire-tie systems, installation of closure pieces and ridge tiles with laps facing away from prevailing winds, and sealing of all laps with asphalt roofing cement.
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City of Sebastian Police Department Tile Roof Replacement
CLAY ROOF TILES
Copyright © 2018 by the American Institute of Architects.
2.2 CLAY ROOF TILES
A. Clay Roof Tiles: ASTM C1167, molded- or extruded-clay roof tile units of shape and configuration indicated, kiln fired, and free of surface imperfections. Provide with fastening holes prepunched at factory before firing.
1. Wind Speed Requirements: Vult = 176 mph (Vasd = 137 mph)
2. Durability: Grade 1
3. High-Profile Shape: Type I, Spanish or "S"
a. Accessory Tiles: Ridge, ridge end, hip and hip starter
4. Size: Contractor to measure size of existing tiles and match existing. Obtain Owner approval prior to ordering product.
5. Finish and Texture: Matte, smooth
6. Color: 60% Clay, 20% Red, 20% Brown. Obtain Owner approval prior to ordering product.
2.3 UNDERLAYMENT MATERIALS
A. Self adhering Felt Underlayment: ASTM D226/D226M, Type II, asphalt-saturated organic felt, unperforated.
2.4 PLASTIC RIDGE VENTS
A. Rigid-Plastic Ridge Vent: Manufacturer's standard, rigid section high-density polypropylene or other UV-stabilized plastic ridge vent for use under ridge tiles.
2.5 ACCESSORIES
A. Asphalt Roofing Cement: ASTM D4586/D4586M, Type II, asbestos free.
B. Butyl Sealant: ASTM C1311, single-component, solvent-release butyl rubber sealant;
polyisobutylene plasticized; heavy bodied.
C. Elastomeric Sealant: ASTM C920, elastomeric polyurethane-based joint sealant of type, grade, class, and use classifications required to seal joints in clay-tile roofing and remain watertight.
D. Roofing Asphalt: ASTM D312, Type IV.
E. Cold-Applied Adhesive: Manufacturer's standard asphalt-based, one- or two-part, asbestos-free, cold-applied adhesive specially formulated for compatibility and use with underlayments.
F. Mortar: ASTM C270, Type M, natural color with ASTM C979/C979M, pigmented mortar matching the color of clay roof tiles for exposed-to-view mortar, and natural color for concealed-from-view mortar.
G. Foam Adhesive: Two-component, polyurethane expanding adhesive recommended for application by clay-roof-tile manufacturer.
Copyright © 2018 by the American Institute of Architects.
H. Eave Closure: Manufacturer's standard eave closure formed to shape of clay roof tile. Material to be approved by Owner prior to ordering.
I. Wood Nailers: To be pressure-preservative-treated wood.
J. Mesh Fabric: 18-by-14 (1.1-by-1.4-mm) mesh of PVC-coated, glass-fiber thread.
2.6 FASTENERS
A. Roofing Nails: ASTM F1667, hot-dip galvanized-steel, 0.120-inch- (3.05-mm-) diameter shank, sharp-pointed, conventional roofing nails with barbed shanks; minimum 3/8-inch- (10-mm-) diameter head; of sufficient length to penetrate 3/4 inch (19 mm) into substrate or through thickness of the sheathing, whichever is less.
1. Where nails are in contact with metal flashing, use nails made from same metal as flashing.
B. Wood Batten Nails: ASTM F1667; common or box, steel wire, flat head, and smooth shank.
C. Wire Ties: Stainless steel, 0.083-inch (2.11-mm) minimum diameter.
D. Twisted-Wire-Tie System: Continuously twisted, two-wire unit with loops formed 6 inches (152
mm) apart, minimum 0.105-inch- (2.67-mm-) diameter galvanized-steel wire and 0.065-inch- (1.65-mm-) diameter galvanized-steel tie wires, with matching-metal folding clip anchors.
E. Single-Line, Wire-Tie System: Interconnecting eave-to-ridge system, minimum 0.106-inch- (2.69-mm-) diameter galvanized-steel wire, preformed to accommodate clay roof tile type and application indicated.
F. Hook Nails: One-piece wind lock and clay roof tile fastener system, minimum 0.120-inch- (3.05-mm-) diameter galvanized-steel wire, for direct deck nailing.
G. Tile Locks: Hot-dip galvanized-steel, 0.1-inch- (2.5-mm-) diameter wire device designed to secure butt edges of overlaid clay roof tiles.
H. Storm Clips: Hot-dip galvanized-steel, minimum 0.048-by-1/2-inch (1.22-by-13-mm) strap-type, L-shaped retainer clips designed to secure side edges of clay roof tiles. Provide with two fastener holes in base flange.
2.7 METAL FLASHING AND TRIM
A. General: Comply with requirements in Section 076200 "Sheet Metal Flashing and Trim."
1. Sheet Metal: Stainless steel, Zinc-tin alloy-coated stainless steel, Zinc-tin alloy-coated steel, or Zinc-tin alloy-coated copper.
B. Fabricate sheet metal flashing and trim to comply with recommendations in SMACNA's "Architectural Sheet Metal Manual" for design, dimensions, metal, and other characteristics of the item.
Copyright © 2018 by the American Institute of Architects.
C. Sheet Metal Ridge Vent: Fabricate from 16-oz./sq. ft.- (0.55-mm-) thick copper sheet, terminating each side in V-shaped external baffles with venting holes producing net-free ventilating area of 2.65 sq. in./ft. (56 sq. cm/m).
D. Vent-Pipe Flashings: ASTM B749, Type L51121, at least 1/16 inch (1.6 mm) thick. Provide lead sleeve sized to slip over and turn down into pipe, soldered to skirt at slope of roof and extending at least 4 inches (102 mm) from pipe onto roof.
PART 3 - EXECUTION
3.1 UNDERLAYMENT INSTALLATION
A. General: Comply with clay roof tile manufacturer's written instructions and with recommendations in NRCA's "NRCA Roofing Manual: Steep-Slope Roof Systems" unless more stringent requirements are indicated.
1. Cover ridge and hip wood nailers with underlayment strips.
B. Single-Layer Felt Underlayment: Install on roof deck parallel with and starting at the eaves. Lap sides a minimum of 4 inches (102 mm) over underlying course. Lap ends a minimum of 4 inches (102 mm). Stagger end laps between succeeding courses at least 72 inches (1829 mm).
Fasten with underlayment nails.
1. Install felt underlayment on roof deck not covered by self-adhering sheet underlayment.
Lap sides of felt over self-adhering sheet underlayment not less than 4 inches (102 mm) in direction that sheds water. Lap ends of felt not less than 6 inches (152 mm) over self-adhering sheet underlayment.
2. Install fasteners at no more than 12 inches (305 mm) o.c. between side laps and 6-inch (152-mm) spacing at side laps.
C. Self-Adhering Sheet Underlayment: Install wrinkle free; comply with low-temperature installation restrictions of underlayment manufacturer if applicable. Install lapped in direction that sheds water. Lap sides not less than 3-1/2 inches (89 mm). Lap ends not less than 6 inches (152 mm), staggered 24 inches (610 mm) between succeeding courses. Roll laps with roller.
Cover underlayment within seven days.
1. Prime concrete and masonry surfaces to receive self-adhering sheet underlayment.
D. Double-Layer Felt/Self-Adhering Sheet Underlayment:
1. Install single layer of felt underlayment on roof deck parallel with and starting at the eaves. Lap sides a minimum of 4 inches over underlying course. Lap ends a minimum of 4 inches (102 mm). Stagger end laps between succeeding courses at least 72 inches (1829 mm). Fasten with underlayment nails.
a. Install fasteners at no more than 12 inches o.c. between side laps and 6-inch spacing at side laps.
2. Install self-adhering sheet underlayment, wrinkle free, on felt underlayment; comply with low-temperature installation restrictions of underlayment manufacturer if applicable. Lap sides not less than 3-1/2 inches in direction that sheds water. Lap ends not less than 6
Copyright © 2018 by the American Institute of Architects.
inches, staggered 24 inches between succeeding courses. Roll laps with roller. Cover underlayment within seven days.
E. Valley Underlayment: Install two layers of 36-inch- (914-mm-) wide felt underlayment centered in valley. Stagger end laps between layers at least 72 inches (1829 mm). Lap ends of each layer at least 12 inches (305 mm) in direction that sheds water, and seal with asphalt roofing cement.
Fasten each layer to roof deck with underlayment nails.
1. Lap roof-deck underlayment over first layer of valley underlayment at least 6 inches (152 mm).
3.2 METAL FLASHING INSTALLATION
A. General: Install metal flashings according to clay roof tile manufacturer's written instructions and recommendations in NRCA's "NRCA Roofing Manual: Steep-Slope Roof Systems."
B. Pipe Flashings: Form flashing around pipe penetrations and tile roofing. Fasten and seal to tile roofing.
C. Sheet Metal Ridge Vents: Install centrally, and mechanically fasten to wood ridge. Adhere each side to clay roof tile with elastomeric sealant.
1. Install fabric mesh over roof-deck air ventilation gaps to prevent insect entry.
3.3 WOOD NAILERS
A. Install wood nailers securely fastened to roof deck at the following locations:
1. Hips.
2. Ridges.
3. Rakes.
B. Install beveled wood cant at eaves and securely fasten to roof deck.
3.4 CLAY ROOF TILE INSTALLATION
A. General: Install clay roof tiles according to manufacturer's written instructions and recommendations in TRI/WSRCA's "Concrete and Clay Roof Tile Design Criteria Installation Manual for Moderate Climate Regions" and NRCA's "NRCA Roofing Manual: Steep-Slope Roof Systems" unless more stringent requirements are indicated.
1. Maintain uniform exposure and coursing of clay roof tiles throughout roof.
2. Extend tiles 2 inches (51 mm) over eave fasciae.
3. Nail Fastening: Drive nails to clear the clay roof tile so the tile hangs from the nail and is not drawn up.
a. Install wire through nail holes of cut tiles that cannot be nailed directly to roof deck and fasten to nails driven into deck.
Copyright © 2018 by the American Institute of Architects.
4. Wire-Tie Fastening: Install wire-tie systems and fasten clay roof tiles according to manufacturer's written instructions.
5. Mortar Setting: Install clay roof tile according to TRI/FRSA's "Concrete and Clay Roof Tile Installation Manual."
6. Foam-Adhesive Setting: Install clay roof tile according to TRI/FRSA's "Concrete and Clay Roof Tile Installation Manual."
7. Storm Clips: Install to capture edges of longitudinal sides of clay roof tiles and securely fasten to roof deck.
8. Tile Locks: Install to support and lock overlying tile butts to underlying tiles.
9. Cut and fit clay roof tiles neatly around roof vents, pipes, ventilators, and other projections through roof. Fill voids with mortar.
10. Install clay roof tiles with color blend approved by Architect.
B. High-Profile Clay Roof Tile Installation:
1. Install eave closure in accordance with 2.5H.
2. Provide minimum 3-inch (76-mm) lap between succeeding courses of clay roof tiles.
3. Install rake tiles indicated.
4. Install ridge tiles with laps facing away from prevailing wind. Seal laps with asphalt roofing cement.
C. Closed Valleys: Cut clay roof tiles at closed valleys to form straight lines, trimming upper concealed corners of tiles. Maintain uniform gap of 1/2 to 3/4 inch (13 to 19 mm) on either side of the water diverter at centerline of valley.
1. Drill or notch cut valley tiles and wire-tie to fastener placed clear of valley metal flashings.
2. Do not nail tiles to metal flashings.
3.5 PLASTIC RIDGE VENTS
A. Rigid-Plastic Ridge Vents: Install continuous ridge vents over clay roof tiles according to manufacturer's written instructions. Fasten with nails of sufficient length to penetrate substrate.
END OF SECTION 073213
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