How To Look At A House

McGarry and Madsen's home inspection blog for buyers of  

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SHINGLE ROOFS

Tuesday, April 30, 2019

Asphalt composition shingles are by far the most popular roofing material in America. More than 75% of homes are topped with them. But the shingle itself is just one part of what the building codes refer to as a roof assembly, which includes the roof deck, substrate, any thermal barrier, and flashings. Here’s links to a collection of our blog posts about SHINGLE ROOFS:

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?

How can I tell if an asphalt shingle roof manufacturer's warranty rating is 20 years, 30 years, or more?

• What causes small areas of pitting or pockmarks in an asphalt shingle roof? 

Why are there sometimes damaged shingles around an area of roof shingle repair or the tie-in of a new 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?

• Are asphalt shingles slippery when wet? 

Do asphalt shingles need time to settle and adhere?

• What is granular loss on a shingle roof? 

• What things can void a shingle roof warranty?

• Can water run uphill on a roof?

• What is a dead valley at a roof? 

• What are common problems of asphalt shingle roofs? 

• Can one missing or damaged shingle cause a roof leak? 

What is the difference between roofing felt and synthetic underlayment?


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