How Many Layers of Shingles Are Allowed on a Roof?
Most building codes will permit a maximum of two layers of either organic or fiberglass asphalt shingles. That limit only applies to roofs that have a 4:12 pitch. When it is time for a roof replacement, there are several factors that could lead your roofer to recommend adding shingles over the pre-existing ones. One of these is cost savings. Think of it like this, by leaving the existing layer on, you can save on labor and disposal costs. Both of those can increase if you are dealing with multiple types of roofing material to dispose of.
Are You a Good Candidate for Re-Roofing?
There are a few situations that do call for a full tear-off. As mentioned above, homeowners are legally allowed two layers of shingles. So it stands to sense that if you already have two, you will need a full tear-off. And, if your roof is badly damaged, chances are it won’t be able to support the weight of another layer, therefore, will need to be torn off. Ultimately, it is best to work with a roofer to determine if your roof is still eligible for re-roofing.
When to Consider Re-Roofing
Roof maintenance is a big part of a homeowner’s responsibility. Although roof maintenance is usually minor and fairly quick, it is vital to stay on top of repairs — you are then not hit with expensive and time-intensive repairs. So if you see any of the following problems, reach out to your roofing contractor to set up a repair or a major remodel:
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Cracked caulk or rust spots on the flashing
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Missing granules on shingles
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Buckling, curling, or blistering shingles
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Damaged, ineffective gutters
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Missing or damaged chimney cap
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Missing or broken shingles
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Leaks or excess moisture in the attic
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Rubber flashing boots that are cracked or worn
If you would like to make an appointment to discuss a roof replacement, please contact Don Sing Roofing at (417) 203-0784 now if you live in the Lebanon, MO region.