Residential Roofing

Attic Ventilation Best Practices for Steep Slope Asphalt Shingle Roof Systems

Ventilation is: Attic ventilation is the flow of outside air through the space at the underside of the deck of an asphalt shingle roof system. The benefits of ventilation are: Ventilation moves heat and moisture out of an attic space. Ventilation helps to prevent premature shingle deterioration

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Reroofing Replacement vs. Recover

When the time comes to reroof an existing asphalt shingle roof, a decision must be made whether to remove the old shingles or apply new shingles directly over the existing layer. Most building codes define the options as follows: Reroofing: The process of recovering or replacing an

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

The ARMA Steep Slope Committee has established the following recommendations regarding the application of asphalt shingles 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: 1. Continuous free-flow ventilation

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Sampling Shingles for ASTM Testing. Understanding Why Proper Sampling Provides Credible Results.

Sampling is the process of selecting material to be tested. For example, ASTM D3462 directs the user to consult ASTM D228 for guidance on selecting samples. D228 outlines a method for selecting samples that is referred to in the field of statistics as “lot-based” sampling. ASTM E

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Re-roofing with Metric Shingles

This bulletin provides general guidelines for reroofing using “metric” type asphalt shingles. Metric shingles are slightly larger than standard 12” x 36” shingles and typically measure 13¼” x 393/8”. Variations of two basic application methods are commonly used: bridging and nesting. Either method will provide satisfactory results

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Coating of Asphalt Shingles After Installation

ARMA strongly advises against the application of any type of field-applied coating over installed asphalt shingles. There are many types and formulations of roof coatings so it is important to always consult the shingle manufacturer before proceeding with any type of coating. Be aware that some asphalt

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Water Soluble Residue Found on Asphalt Roofing Products (“Tobacco-Juicing”)

The formation of a “tobacco-juice” residue, so named for its color, has been widely attributed to the weathering of asphalt roofing (i.e., roof coatings, base and cap sheets and shingles – to name a few) or the exudation of asphalt fractions from the roofing material, regardless of

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When Does a Shingle Comply with ASTM D3462?

Shingles that are in conformance with ASTM D3462 at the time of manufacture have a proven track record of performance, meeting and exceeding customer expectations. Asphalt shingles made with fiberglass mat are complex composite products made by combining materials with significantly different properties. Shingles that are in

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Variations in Color Appearance on Newly Installed Asphalt Shingle Roofs

Homeowners may look at their newly installed roof and think, “This doesn’t look like the picture in the brochure.” In fact, variations in the appearance of asphalt shingle roofs are not uncommon, and generally occur for five reasons: color shading, back surfacing transfer, staining, visible asphalt and

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Plain Facts About Buckled Shingles

Reviews the causes, prevention and correction of buckled shingles. Description Buckling is the result of asphalt shingles not laying flat due to the wrinkling of the roofing underlayment or the movement of the wood deck. Causes During the summer months we normally experience high humidity, and as

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Asphalt Roofing Manufacturers Association
529 14th Street, NW
Washington, DC 20045
Tel: (202) 591-2450
Fax: (202) 591-2445

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