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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Photovoltaic Systems and Low-slope Commercial Roofs

Introduction The push toward sustainable building practices has led design professionals to look at roofs as more than just the waterproofing element. They view the roof as space for renewable energy sources such as photovoltaic (PV) systems. While PV systems can offer benefits to both the environment

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Water Soluble Residue from Asphalt Roofing Products (“Tobacco Juicing”)

Describes origin of tobacco juicing and the effects this residue may have on modified bitumen roofs. Provides ways to minimize/eliminate residue runoff. The formation of a “tobacco-juice” residue, so named for its color, is the normal result of the weathering of all asphalt-based products (i.e., roof coatings,

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Effects of Roof Color and Solar Reflectance on the Accumulation of Moisture in Roof Systems

Introduction: Moisture content within a roofing assembly may fluctuate significantly over the life of the roof depending on a variety of factors including, but not limited to: moisture in the existing roof assembly at time of installation; interior and exterior temperatures; interior and exterior humidity conditions; deck

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ARMA Lightweight Structural Concrete Roof Decks Statement

Decks may not be suitable for durable, sustainable roofing systems The roofing industry is increasingly experiencing roof system performance issues when roof systems are installed over lightweight structural concrete roof decks. The high moisture content of these decks, coupled with long drying times and an inability to

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