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	SECTION 07312
	ROOFING UNDERLAYMENT
	Copyright 2010 - 2011 ARCAT, Inc. - All rights reserved
	** NOTE TO SPECIFIER ** Alpha ProTech Engineered Products, Inc. / Rex SynFelt Products; roofing underlayment. This section is based on the products of Alpha ProTech Engineered Products, Inc. / Rex SynFelt Products, which is located at: 301 S. Blanchard St. Valdosta, GA 31601 Toll Free: 866-312-1837 Phone: 229-242-1931 Fax: 229-242-1947 Email: bhayden@alphaprotech.com Web Site www.alphaprotech.com www.rex-synfelt.com Alpha ProTech is in the business of protecting people, products and environments. We accomplish this by developing, manufacturing and marketing a line of high-value protective apparel, infection control and extended care products in addition to a line of construction weatherization building products for the housing market. Our products are sold both under the "Alpha ProTech" brand name as well as under private labels.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete items below not required for project.
		A.	Roofing underlayment.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 06100 - Rough Carpentry: Roof framing and sheathing.
		B.	Section 07310 - Shingles, Roof Tiles, And Roof Coverings: Roof coverings applied over underlayment.
		C.	Section 07620 - Flashing and Sheet Metal: Gutters and downspouts.
		D.	Section 08630 - Unit Skylights: Skylights.
	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 International (ASTM):
			1.	ASTM D 226 - Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing
			2.	ASTM D 779 - Standard Test Method for Water Resistance of Paper, Paperboard, and Other Sheet Materials by the Dry Indicator Method.
			3.	ASTM D 828 - Standard Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus.
			4.	ASTM D 1970 - Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection.
			5.	ASTM D 4533 - Standard Test Method for Trapezoid Tearing Strength of Geotextiles.
			6.	ASTM D 4586 - Standard Specification for Asphalt Roof Cement, Asbestos-Free.
			7.	ASTM D 4869 - Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing.
			8.	ASTM E 108 - Standard Test Methods for Fire Tests of Roof Coverings.
		B.	National Fire Protection Association: NFPA 256 - Standard Methods of Fire Tests of Roof Coverings.
		C.	Miami-Dade #05-0224.02. ICC ESR-1601 (ASTM D 226).
	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.	Application methods.
	** NOTE TO SPECIFIER ** Delete if not required.
		C.	Shop Drawings: Submit copies of manufacturer's standard details describing installation methods and flashing conditions applicable to the project.
		D.	Verification Samples: For each product specified, two samples, 12 inches (305 mm) square sample for approval by the Architect.
	1.5	QUALITY ASSURANCE
		A.	Installer Qualifications: Minimum of two years demonstrated experience in installing products of the same type and scope as specified.
	** 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.
		B.	Mock-Up: Provide a mock-up for evaluation of material, workmanship.
			1.	Construct areas designated by Architect.
			2.	Do not proceed with remaining work until material, details and workmanship are approved by Architect.
			3.	Remodel mock-up area as required to produce acceptable work.
	** NOTE TO SPECIFIER ** Delete if not required.
			4.	As approved by Architect, mockup may be incorporated into finished work.
	1.6	DELIVERY, STORAGE, AND HANDLING
		A.	Deliver materials to site in manufacturer's original, unopened containers and packaging, with labels clearly identifying product name and manufacturer. Upon delivery, materials shall be inspected for damage. Deficient materials shall not be used.
		B.	Store materials in a clean dry area in accordance with manufacturer's instructions.
		C.	Protect materials during handling and application to prevent damage or contamination.
	1.7	ENVIRONMENTAL CONDITIONS
		A.	Maintain environmental conditions (including but not limited to temperature, humidity, exposure to sunlight and ventilation) within recommended limits. Do not install products under, or expose products to environmental conditions outside manufacturer's absolute limits.
		B.	Protect membrane from direct sunlight until ready for use. Do not apply membrane when surfaces are frozen.
	1.8	WARRANTY
		A.	Manufacturer's Standard Warranty: If installed precisely as stated in the manufacturer's written installation procedures, product will retain its ability to shed water, except as noted, for a period of twenty five years from the sales invoice date. The warranty is null and void if:
			1.	Any part of the product is exposed to UV after roof cladding installation.
			2.	Product has been installed and left uncovered without roof cladding for more than 180 days.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: Alpha ProTech Engineered Products, Inc. / Rex SynFelt Products, which is located at: 301 S. Blanchard St. ; Valdosta, GA 31601; Toll Free Tel: 866-312-1837; Tel: 229-242-1931; Email: bhayden@alphaprotech.com; Web: www.alphaprotech.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	ROOFING UNDERLAYMENT
		A.	REX SynFelt Roofing Underlayment: Prepared roofing shingle underlayment for use in the installation of Class A asphalt glass fiber shingle sand Class C asphalt organic felt shingles as manufactured by Alpha ProTech Engineered Products, Inc. / Rex SynFelt Products.
			1.	Description: Synthetic underlayment constructed of high-woven fabric, polypropylene, coated on both sides with a specially formulated anti-slip walking surface that is 100 percent asphalt free.
			2.	Compliance:
				a.	Meets ASTM D 226. Miami-Dade #05-0224.02. ICC ESR-1601.
				b.	Class A Fire (3-tab shingles) ASTM E 108 and NFPA 256 Pass
				c.	Nail Seal Ability Pass: ASTM D 1970.
				d.	Water Transmission Pass: ASTM D 4869.
				e.	Tensile Strength ASTM D 828.
					1)	MD: 96.
					2)	CD: 116.
				f.	Tear Strength: ASTM D 4533.
					1)	MD: 58.
					2)	CD: 77.
				g.	Pliability Pass: ASTM D 226.
				h.	Water Ponding: Pass, ASTM D 779.
			3.	Weight Per Square: 2.8 lbs (1.3 kg).
			4.	Roll Width: 48 inches (1219 mm).
			5.	Roll Length: 250 feet (76.2 m)
	** NOTE TO SPECIFIER ** Delete if not required.
		B.	Roofing Cement: Low solvent, asbestos free, plastic roofing cement meeting ASTM D-4586 Type 1, Federal Spec SS-153 Type 1.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Comply with manufacturer's written instructions and recommendations.
		B.	Do not begin installation until substrates are within manufacturer's specified tolerances and have been prepared in accordance with manufacturer's instructions.
		C.	If substrate preparation is the responsibility of another installer, do not proceed with installation. Notify Architect of unsatisfactory preparation immediately.
		D.	Commencement of work is deemed as acceptance of installation conditions.
	3.2	PREPARATION
		A.	Clean surfaces thoroughly prior to installation.
		B.	Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
	3.3	INSTALLATION
		A.	Apply roofing underlayment in accordance with manufacturer's instructions and the following.
			1.	Install horizontally (parallel to the eave) with printed side up.
			2.	For vertical laps, overlap seams a minimum of 3 inches (76 mm).
			3.	For horizontal laps, overlap seams a minimum of 6 inches (152 mm).
			4.	On roof slopes less than 3:12, lap underlayment at 24 inches (61 cm) or to center line as printed, over the underlying course.
			5.	Attach roofing underlayment to the roof using plastic cap roofing nails having a 1 inches (25 mm) diameter plastic cap. Spacing shall be at 8 inches (20 cm) on center at both horizontal and vertical caps for normal wind zones.
			6.	In high wind zones and coastal areas, fasten roofing underlayment at 4 inches (101 mm) at both horizontal and vertical laps. In all cases fasten at 24 inches (61 cm) on center along the center of the roll in the field of the roof. The pre-printed nail pattern spacing described above applies to normal as well as high wind conditions.
			7.	Do not use staples to attach roofing underlayment unless the final roof covering is to be installed immediately afterward. Pneumatic staple guns are not recommended.
			8.	Where seams and joints require the use of sealant or adhesives, use a high quality, low solvent, asbestos free, plastic roofing cement specified and consult manufacturer's installation instructions.
	3.4	PROTECTION
		A.	Protect installed product and finish surfaces from damage during construction until completion of project.
		B.	Touch-up, repair or replace damaged products and finishes before Substantial Completion.
	END OF SECTION