NRCA offers asphalt shingle guidelines

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National Roofing Contractors Association Guidelines for Asphalt Shingle Roof Systems offers best practice guidelines for the design, materials, and application of asphalt shingle roof systems. 

September 17, 2012

National Roofing Contractors Association Guidelines for Asphalt Shingle Roof Systems offers best practice guidelines for the design, materials, and application of asphalt shingle roof systems. The publication contains information about roof decks, underlayments, asphalt shingles, construction details, and attic ventilation.

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