How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
Frequently Asked Questions (FAQ) About Asphalt Shingles
Sunday, January 5, 2020
Asphalt shingles have been around since the early 20th century, and are by far the most popular roof covering in America. Here’s links to answers for the questions we get asked most often about them:
• Why is granule loss a problem for an asphalt shingle roof?
• What causes roof shingles to curl up at corners?
• Why is premature curl of roof shingles a problem?
• Can I put a new asphalt shingle roof over an existing shingle roof on a manufactured/mobile home?
• How can I tell if a roof has more than one layer of shingles?
• What is the life expectancy of an asbestos cement shingle roof?
• Does a roof with multiple layers of shingles last longer?
• Why is a popped nail in a shingle roof a problem? How do I fix it?
• What are the dark lines running parallel to shingles on my roof?
• What is the average lifespan of an architectural (dimensional) shingle roof?
• What is the average lifespan of a regular (3-tab) shingle roof?
• What does "lack of tab adhesion" in an asphalt shingle roof mean?
• What is the minimum pitch/slope of an asphalt shingle roof?
• What's the difference between an "architectural" and a regular shingle roof?
• Why is an asphalt shingle roof difficult to inspect when wet right after it has rained?
• What causes small areas of pitting or pockmarks in an asphalt shingle roof?
• What would cause a new asphalt shingle roof to have loose tab adhesion (sealant strips)?
• Can I install a new metal roof over an asphalt shingle roof?
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