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	SECTION 07320
	ROOF TILES
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	** NOTE TO SPECIFIER ** American Slate Company; roofing, flooring, wall cladding and special project features. . This section is based on the products of American Slate Company, which is located at:
	1900 Olympic Blvd. Suite 200 Walnut Creek, CA 94596 Toll Free Tel: (800) 553-5611 Tel: (925) 977-4880 Fax: (925)977-4885 Email: slatexpert@americanslate.com Web: www.americanslate.com [ Click Here ] for additional information.
	American Slate Company is by far the largest and most reputable source of natural slate in the United States. Over the course of the past 25 years, we have built and strengthened close partnerships with the largest and best Quarries around the world. The number of quarries with which we work is important to our product line, because depending upon the minerals present in various locations, Natural Slate forms in different colors and textures. Currently, our product line includes sixty different product colors and textures. Direct Connection When you choose to work with American Slate Company, you have all the benefits of working directly with the Quarry, with expert quality control programs built in. Our associations are built on full cooperation, including inspection procedures, deliveries and constant communication. Materials from American Slate Company undergo strict inspections to ensure that you receive top quality materials processed to the industry's highest standards at a competitive price. Inventory Close at Hand American Slate Company has strategically located warehouses filled with the largest inventories of natural roofing, flooring and paving materials in the United States. Deliveries can be made to your jobsite, both nationwide and worldwide. American Slate Company - The Experts in Slate. We have the expertise and first-hand knowledge of a wide range of Slate and Quartzite products. Contact American Slate Company for information about durable natural tiles for applications from roofing and flooring to wall cladding and special project features. No other source can offer you the experience and knowledge that you will find at American Slate Company, developers of the comprehensive slate industry since 1978. Slate & Quartzite Choose from over 60 product colors in various sizes and shapes. Slate Tile from American Slate Company is guaranteed to conform to standard thickness and size. As easy to install as ceramic tile, yet natural slate is more durable and beautiful. .
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete items below not required for project.
		A.	Installation of slate roof and associated roof accessories.
		B.	Selective removal of existing slate.
		C.	Patching of existing roof and roof flashing.
		D.	Preparation for installation of slate roofing.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 04200 - Unit Masonry.
		B.	Section 06100 - Rough Carpentry.
		C.	Section 06300 - Exterior Finish Carpentry.
		D.	Section 07620 - Sheet Metal Flashing.
	1.3	REFERENCES
	** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
		A.	ASTM B 101 - Standard Specification for Lead-Coated Copper Sheet and Strip for Building Construction.
		B.	ASTM B 370 - Standard Specification for Copper Sheet and Strip for Building Construction.
		C.	ASTM C 406 - Standard Specification for Roofing Slate.
		D.	NRCA - The NRCA Roofing and Waterproofing Manual.
	1.4	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	[ Product Data ]: Manufacturer's data sheets on each product to be used, including:
			1.	Preparation instructions and recommendations.
			2.	Storage and handling requirements and recommendations.
			3.	Installation methods.
		C.	Shop Drawings: Details for specially configured metal flashing, jointing methods and locations for flashing, and other roofing system details.
	** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.
		D.	Selection Samples: For each finish product specified, two complete sets of color samples representing manufacturer's full range of available colors and patterns.
		E.	Verification Samples: For each finish product specified, two samples, representing actual product, color, and patterns.
	1.5	QUALITY ASSURANCE
		A.	Manufacturer Qualifications:
			1.	Approved manufacturer supplying material complying with physical characteristics requirements of ASTM C 406 for grade and profile specified.
		B.	Provide each color of slate from a single quarry capable of producing slate of consistent quality in appearance and physical properties.
		C.	Roofing shall be installed per NRCA Roofing and Waterproofing Manual.
		D.	Installer Qualifications:
			1.	Employ a roofer who has experience in restoration and repair of slate roofs. Roofer shall submit a list of recently completed projects including the Owner and Architect's address and phone numbers for reference.
	** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.
		E.	Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
			1.	Provide in-place mock-up of shingles and flashing for Architect's review to show layout and installation procedure prior to starting work.
	1.6	DELIVERY, STORAGE, AND HANDLING
		A.	Deliver to the project site in manufacturer's unopened containers or bundles fully identified with name, brand, type and grade.
		B.	Store off the ground in a dry ventilated space or protect with suitable waterproof coverings.
		C.	Damaged or deteriorated materials shall be removed from the premises.
		D.	Store and dispose of solvent-based materials, and materials used with solvent-based materials, in accordance with requirements of local authorities having jurisdiction.
	1.7	PROJECT CONDITIONS
		A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
	1.8	WARRANTY
		A.	Installation shall be warranted by the Contractor to be free from leaks and faulty or defective materials and workmanship for a period of five (5) years from date of substantial completion.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: American Slate Company, which is located at: 1900 Olympic Blvd. Suite 200 ; Walnut Creek, CA 94596; Toll Free Tel: 800-553-5611; Tel: 925-977-4880; Fax: 925-977-4885; Email: request info; Web: www.americanslate.com
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
		B.	Substitutions: Not permitted.
		C.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
	2.2	SLATE SHINGLES
		A.	Approved manufacturer supplying material complying with physical characteristics requirements of ASTM C406 for grade and profile specified.
		B.	Standard square unfading shingle having no ribbons exposed to weather. Pre-punched or drilled with two nail holes per slate with the following grade:
	** NOTE TO SPECIFIER ** Delete grade not required.
			1.	Grade S1. (75 year expected service life).
			2.	Grade S2. (40 year expected service life).
			3.	Grade S3. (20 year expected service life).
		C.	Finish of Slate Shingle:
	** NOTE TO SPECIFIER ** Delete finish not required. Refer to color notes for availability.
			1.	Rough Texture:
	** NOTE TO SPECIFIER ** Delete one of the following two thickness ranges. First paragraph is the manufacturer’s default range.
				a.	1/4 inch (7 mm) to 3/8 inch (10 mm).
				b.	3/8 inch (10 mm) to 5/8 inch (15 mm) thick.
			2.	Standard: 3/16 inch (5 mm) to 1/4 inch (7 mm) thick.
		D.	Slate Length: 16 inches (400 mm).
		E.	Slate Widths:
	** NOTE TO SPECIFIER ** Delete width not required. Refer to color notes for availability.
			1.	8 inches (200 mm).
			2.	10 inches (250 mm).
		F.	Provide starter and ridge shingles as required.
	** NOTE TO SPECIFIER ** Colors available in 8 (200 mm) and 10 inches (250 mm) widths unless noted.
		G.	Color of Slate:
	** NOTE TO SPECIFIER ** Following colors available in rough texture (R) only.
			1.	African Black.
			2.	China Grey.
			3.	China Multicolor.
			4.	Copper Grey.
			5.	Desert Rose.
			6.	Grey Black.
			7.	Irish Green.
			8.	Mountain Grey.
			9.	Mountain Mist.
			10.	Silverblue.
			11.	Westcountry.
	** NOTE TO SPECIFIER ** Following colors available in standard thickness (S) only.
			12.	Blue-Black.
			13.	Black.
			14.	Del Carmen Black.
	** NOTE TO SPECIFIER ** Following colors available in rough texture (R) and standard thickness (S).
			15.	Cherry Plum.
			16.	China Sea Green.
			17.	Cloud Grey.
			18.	Emerald Green.
			19.	English Grey.
			20.	Fern Green.
			21.	Midnight Black.
			22.	Strata Grey.
	2.3	SHEET MATERIAL
		A.	Underlayment; 30# asphalt saturated felt.
		B.	Ice dam protection; Sheet barrier of self adhered rubberized asphalt bonded to sheet polyethylene, 40 mil (1 mm).
	2.4	ACCESSORIES
		A.	Nails and accessories to be as recommended by the shingle manufacturer.
		B.	Nails to be minimum #10 gauge solid copper slating nails:
			1.	1 1/2 inches (38 mm) long for field shingles, minimum
			2.	2 inches (51 mm) long for hips and ridges, minimum.
			3.	Length as required for full penetration into sheathing but not less than 1 inch (25 mm) longer than shingle thickness.
			4.	Gauge shall increase for longer, thicker tiles as recommended by the manufacturer.
		C.	Slate hooks to be copper or stainless steel.
		D.	Snow and ice guards to be copper with straps designed to be installed without penetrating slate shingles, and complete with predrilled holes or hooks for anchoring.
		E.	Snow-Guard Rails: Stainless steel assembly with metal base plate anchored to bracket and horizontal bars as detailed.
		F.	Plastic cement to be asbestos free, asphalt type with mineral fiber component conforming to ASTM D 4586.
	2.5	FLASHING MATERIALS
		A.	Fabrication to comply with Section 07620.
		B.	Roof flashing shall be copper and shall include apron, step, drip, pipe sleeve, hip and valley profiles.
			1.	Lead coated copper to conform to ASTM B 101.
			2.	Red copper to conform to ASTM B 370.
		C.	Exposed copper flashing shall be 20 oz.
		D.	Concealed copper flashing to be 16 oz.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Do not begin installation until substrates have been properly prepared.
		B.	If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
	** NOTE TO SPECIFIER ** Delete if not required.
	3.2	REMOVAL OF DAMAGED SLATE TILES
		A.	Identify areas of roof where slates are to be removed. Review this with the Architect and Owner.
		B.	Remove the existing damaged tiles carefully. Do not damage adjacent tiles.
		C.	Inspect sheathing and framing after tiles are removed. If substrate or framing are sound, work shall proceed. If substrate or framing are not structurally sound, contact Architect before proceeding with work.
	3.3	EXAMINATION AND PREPARATION
		A.	Confirm that roof penetrations are completed and ready to be flashed.
		B.	Confirm that plumbing stacks are through the roof and ready to be flashed.
		C.	Confirm that sheathing and insulation is blocked solid at all edges and fully secured per requirements of the Factory Mutual rating required and/or the insulation and roofing manufacturer recommendations whichever is more stringent.
		D.	Coordinate flashing of chimney with related masonry and flashing sections.
		E.	Confirm that attic/ roof venting system is in place and compatible with roof layout and installation.
	3.4	ICE DAM PROTECTION
		A.	Install copper drip edge at all eaves and gables. Lap end joints and seal with plastic roof cement. Nail flanges to roof with copper nails.
		B.	Install 40 mil (1 mm) ice and water shield from eave to a line at least 3 feet (1 m) over heated area of roof.
		C.	Install 30#. roofing felt over sheathing and lap over ice shield. Run with length of ridge and shingle in direction of roof slope.
	3.5	VALLEY FLASHING
	** NOTE TO SPECIFIER ** Delete if not required.
		A.	Existing valley flashing will remain unless damaged. Remove and replace if corroded or damaged.
	** NOTE TO SPECIFIER ** Delete if not required.
		B.	Install one layer of copper flashing in valleys. Crimp flashing at break to deflect water. Flashing to be 36 inches (914 mm) wide overall.
	** NOTE TO SPECIFIER ** Delete if not required.
		C.	Match existing where exposed at existing roofing.
		D.	Hook flashing along upper edge to prevent water migration under flashing. Flashing to be 36 inches (914 mm) wide overall.
		E.	Use copper clips to fasten flashing to roof over felt with copper nails.
		F.	Joints to be soldered.
	3.6	SLATE SHINGLE INSTALLATION: GENERAL
		A.	Shingles shall be pre-punched at the factory.
		B.	Nails shall be of the length and gauge required for the length and thickness of shingle being used.
		C.	Minimize the field punching of slate.
		D.	Use only those nails specified herein or as specified by the factory.
		E.	Ensure that nails penetrate the roof sheathing fully without penetrating the other side where sheathing is exposed on the underside.
	** NOTE TO SPECIFIER ** Delete if not required.
	3.7	SLATE SHINGLE INSTALLATION AT EXISTING ROOF
		A.	Install shingles in accordance with manufacturer's recommendations and local building codes as required.
		B.	Provide starter course at eaves.
		C.	Match existing number of layers and details where working with an existing roof.
		D.	Install shingles in the pattern that blends into existing slate.
		E.	Coordinate shingle installation with ridge vent installation.
		F.	Hips to match existing. Set in roofing cement in accordance with manufacturer's recommendations and local building codes as required.
		G.	Valleys to match existing.
		H.	Ridges to match existing. Set in roofing cement in accordance with manufacturer's recommendations and local building codes as required.
	3.8	SLATE SHINGLE INSTALLATION
		A.	Install shingles in accordance with manufacturer's recommendations and local building codes as required.
		B.	Provide a double starter course at eaves.
		C.	Install shingles in the pattern approved in the mock-up.
			1.	Ensure that layout of shingles is centered on roof where roof has two gable ends so that end slates are not less than 1/2 a slate wide.
			2.	At roofs where there is a gable and a valley, start with full and half slates at the gable and work to the valley or hip.
			3.	Ensure that layout is such that the last exposed shingle at the ridge has a full exposure after the ridge slate is installed.
		D.	Coordinate shingle installation with ridge vent installation.
		E.	Slate Grading:
	**NOTE TO SPECIFIER** Delete slate grading not required.
			1.	Slate Grading: Sort slates according to thickness into a minimum of three grades. Install thickest slates beginning at the eaves and introduce consecutive thickness grades as installation proceeds up the roof slope, creating a smooth overall appearance. Blend slates from all crates/pallets together to achieve a uniform color and texture to the roof.
			2.	Slate Grading: Do not sort slates according to thickness. Install slates randomly selected, beginning at the eaves and progressing up the roof slope, creating a textured overall appearance. Slate thickness variations preventing the laying of a weather tight roof will not to be permitted. Blend slates from all crates/pallets together to achieve a uniform color and texture to the roof.
		F.	Head Lap:
	**NOTE TO SPECIFIER** Delete headlaps not applicable from below.
			1.	Slate to be installed at special 2 inches (50 mm) headlap.
			2.	Slate to be installed at standard 3 inches (75 mm) headlap.
			3.	Slate to be installed at special 4 inches (100 mm) headlap.
		G.	Ridges are to be as follows. Set in roofing cement as per manufacturer's instructions.
	** NOTE TO SPECIFIER ** Delete ridge installation not required.
			1.	Saddle ridge.
			2.	Strip saddle ridge.
			3.	Combing ridge.
			4.	Coxcomb ridge.
		H.	Hips: Set in roofing cement in accordance with manufacturer's recommendations and local building codes as required.
		I.	Valleys: Set in roofing cement in accordance with manufacturer's recommendations and local building codes as required.
	3.9	CLEAN-UP AND REPAIR
		A.	Replace shingles damaged during installation or construction.
		B.	Remove roofing cement from exposed surfaces.
		C.	Remove shingle scraps and other debris from the site at the end of each work day.
	3.10	PROTECTION
		A.	Protect installed products until completion of project.
		B.	Repair or replace damaged products before Substantial Completion.
	END OF SECTION