What is a roof-over?

Tuesday, May 4, 2021

A “roof-over” is when an existing roof remains in place and a new roof is applied on top of it. This is also called a “roof recover." Although it is usually done with an asphalt shingle roof, the new roof can be any roofing material. To learn more, see our blog posts Does a roof with multiple layers of shingles last longer? and How can I tell if a roof has more than one layer of shingles? and How many layers of roofing are allowed on a home? and Can I put a new asphalt shingle roof over an existing shingle roof on a manufactured/mobile home?

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Here’s links to a collection of some of our other 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?

What is the life expectancy of an asbestos cement shingle roof?  

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?  

     Visit our ROOF AND ATTIC page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.

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