ARMA Lightweight Structural Concrete Roof Decks Statement

While properly designed roof systems installed over lightweight structural concrete roof decks have performed successfully, moisture-related complications can be an issue when these roof decks are used as a roof substrate. Higher absorptive properties of aggregates typically used in lightweight structural concrete can result in an elevated

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Decking Recommendations for Built-Up Roofing and Modified Bitumen Membranes

Introduction The Asphalt Roofing Manufacturers Association (ARMA) recommends that the structural roof deck meet certain minimum requirements to be an acceptable substrate for the specified roofing system. Generally, all decks should be clean, dry, and securely fastened to the building structure with no abrupt level changes exceeding

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Application of Asphalt Shingles to Decks Installed over Insulation or Radiant Barriers

The Asphalt Roofing Manufacturers Association (ARMA) has established the following recommendations for applying asphalt shingles and/or asphalt-based underlayment directly over insulation, insulated roof decks, and radiant barriers. Shingle Application Directly Over Insulation Applying shingles directly over insulation is not recommended for a number of reasons. Asphalt shingles

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Potential Effects of Contaminants on Modified Bitumen Sheet Materials

Introduction Roof membrane systems are intended to provide protection from natural elements, such as rain, snow, hail, and sleet. Systems that are properly designed, installed, and maintained should provide the user with long-term satisfactory protection from these elements. Some roof membrane systems, such as those installed on

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Cold Weather Application Recommendations for Modified Bitumen Roofing

Overview of proper storage, handling and application methods in cold temperatures. Contains information for both torch-applied and hot asphalt-applied products. Introduction The application of any roofing system during cold weather poses special challenges.  Specific to modified bitumen materials, these challenges can include maintaining proper sheet material, adhesive,

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