2 Layers Of Shingles On Roof

Ask your roofer about recycling options for old shingles.

2 layers of shingles on roof.

If you have done some serious research on roofing then you have probably heard about adding a second layer of shingles on top of the old ones. When shingles laying on two roof planes approach each other in a valley weave the layers of shingles across the valley to create an integrated unbroken water barrier across the valley. Replacing a roof can be very expensive and exhausting at the same time. Having multiple layers of shingles is going to make your roof hotter because the heat gets trapped between the layers which could mean premature aging of the shingles.

A roof is one of the most vital components of a house. Framing includes the roof trusses that sit at the top of your house and support the weight of all the materials used to build your roof. The biggest mistake people make when layering roofing is to purchase cheap shingles for the new roof. The importance of quality roof shingles.

They seldom consider that in 15 years when their roofing once again fails they will have to pay significantly more to have someone remove both layers of shingles and apply new ones. A bundle or package of shingles weighs about 70 pounds depending on the type of composition shingle. If the roof has multiple layers typically the insurance company will only insure the top layer. When a home has two layers of shingles the trusses are supporting twice the normal weight of a single layer roof.

Pros and cons of adding a second layer of shingles. On a 1 200 square foot home that s an additional 3 000 to 4 000 pounds of shingles for the second layer. So let s say we have a hail storm and the roof takes a beating. Fasteners course with full panels.

This is especially true if you ve overlayed your new shingles on top of warped shingles. Decra shingle installation guidelines over 2 layers of asphalt shingles follow the local code. Apply a liberal amount of plastic roof cement at the base of any fixtures plumbing pipes or roof vents which break the plane of the roof surface. Why roof shingles work best in single layers.

The temporary savings you receive from adding a second layer of shingles does not outweigh the negative aspects. Multiple layers of shingles roof deck attic air space and the insulation above the ceiling individuals who metal roof over solid deck asphalt shingle soft whisper content retrieval. Posted july 31 2018 by onpage marie. If it needs to be replaced the insurance policy will only cover the replacement of the top layer.