Self-adhering underlayment is generally applied to the roof deck on the eaves, rakes, and valley areas of steep slope roofs and as flashing around roof penetrations. Self-adhering underlayments are installed on critical areas of the roof to minimize the likelihood of water penetrating the roofing system. In
Read more →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
Read more →Many types of roofing permit the application of a coating for a variety of reasons, such as increasing solar reflectivity, resisting biological growth, improving impact resistance, or increasing roof life. However, ARMA strongly advises against the application of any type of field-applied coating over installed asphalt shingles.
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