2 Layer Roof

Here are the layers of a roof in order of application bottom to top.

2 layer roof.

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. Often there is a problem with the first layer of shingles that was not apparent before the second layer was added. You can usually see the underside of plywood decking from the attic. This channel is for educational purposes only.

If it needs to be replaced the insurance policy will only cover the replacement of the top layer. Double layer or double coverage roofing underlayment are defined here. Use your best judgement of. Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio.

In most areas building codes allow for up to two layers of shingles installed on a roof. 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. It provides structure by tying the trusses and joists together.

Adding a second layer could compromise the structure of your roof. Examine the edge of the roof to make sure there s only one layer of shingles currently installed. Roofing felt underlayment layers. So let s say we have a hail storm and the roof takes a beating.

The methods taught in these video s are just a few of many ways to do construction. One of the situations where this option can make the most sense is for a temporary fix as part of a long term plan. 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. Decking most often made out of plywood this roof layer is installed over the framing in a typical roof install.

Despite these drawbacks layering shingles can still be the best plan for your roof. If you do remove the old shingles you will end up with a nice fresh layer of felt on the roof deck.