2 Layer Roof

In most areas building codes allow for up to two layers of shingles installed on a roof.

2 layer roof.

A second layer of shingles only complicates the job when a roofer is trying to fix a leak. Examine the edge of the roof to make sure there s only one layer of shingles currently installed. Any more than two layers of shingles can be too much for the roof to handle even if the local building codes don t outlaw it. If the roof has multiple layers typically the insurance company will only insure the top layer.

Adding a second layer could compromise the structure of your roof. If you do remove the old shingles you will end up with a nice fresh layer of felt on the roof deck. Roofing felt underlayment layers. If it needs to be replaced the insurance policy will only cover the replacement of the top layer.

But contractors who spoke with angie s list say best practices call for stripping the roof down to the wood deck to inspect it before installing a new roof. Often there is a problem with the first layer of shingles that was not apparent before the second layer was added. So let s say we have a hail storm and the roof takes a beating. It provides structure by tying the trusses and joists together.

One of the situations where this option can make the most sense is for a temporary fix as part of a long term plan. Now you just have to decide whether to remove the existing roof shingles or recover the roof. Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio. This channel is for educational purposes only.

Re shingle roof as part of a larger plan. Here are the layers of a roof in order of application bottom to top. Despite these drawbacks layering shingles can still be the best plan for your roof. You can usually see the underside of plywood decking from the attic.

We explain when double coverage of felt underlayment is recommended and we describe how to figure out if your roofer installed a single layer or double coverage layer or maybe no layer of felt under the roof shingles. Double layer or double coverage roofing underlayment are defined here.