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Would you recommend re-roofing over a single layer of asphalt shingles?

In most cases
22%
In some cases
33%
Never
40%
Not Sure
3%
Next Question
Question: Would you recommend re-roofing over a single layer of asphalt shingles?
Top Answer (40% of 27 votes): Never.

Answer: Never
Explanation: Of 800 installations, I have only done three shingle over projects.
JPS-WNC llc
Answer: Never
Explanation: As a MasterElite installer we cannot roof over existing shingles and for the cost and longevity it's more cost effective to install a new roof entirely.
Aci Exteriors LLC
Answer: In some cases
Explanation: LIMITED FUNDS AVAILABLE, EXISTING NOT SHOT YET.
Driggz Roofing & Restoration LLc
ProMatcher
Answer: In most cases
Explanation: in most cases I would always roof over a single layer unless there is dryrott issues with the sheeting under roof
all-phaze handyman & TV install
Answer: Never
Explanation: We do not recommend doing so. While it may seem cheaper to do so, in the long run, it can cost more to so. The weakest point in your roof is the underlayment material. Most roofs are done with felt paper underlayment which absorbs moisture and begins to fail after about 10 years. If the roof is worn out and needs replacing, then the underlayment is also bad and will offer no protection. The worn out shingles now become your underlayment, a job that they were not designed to perform. At Allegiant Roofing we will always recommend removing all worn out materials and installing new materials to provide the longest life roof possible.
Allegiant Roofing, LLC
Answer: In most cases
Explanation: Code says you are allowed to
HAMMER & SONS CONSTRUCTION
ProMatcher
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Related Questions

Are asphalt roof shingles biodegradable?Top answer: Never

Are Asphalt Shingles Considered Hazardous Waste?Top answer: No

Should I use asphalt shingle roof nail caps?Top answer: Always

Can Moss Damage an Asphalt Shingle Roof?Top answer: In most cases

How long does an asphalt shingle roof last?Top answer: 25-30 years

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