Roof Layers House

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.

Roof layers house.

Each layer has a specific purpose that when combined with the other components provides protection to your home. Custom cross section diagram of a house roof showing the many different parts of a residential roof including structural parts the various layers exterior and various roof features such as skylight and chimney. Roof maintenance is a major part of any homeowner s responsibility. Here are the layers of a roof in order of application bottom to top.

When to consider re roofing. 3 starter shingles a narrow row of asphalt roofing the starter strip is nailed to the perimeter of the roof with a bead of adhesive on top that grips the underside of the first course of shingles. The average 30 square roof uses 90 bundles of shingles and a bundle of asphalt roofing shingles weighs about 100 pounds which means you re. The purpose of the fascia board is to prevent water and wind from damaging the interior of the house.

You re essentially adding a second roof on your house and that added weight puts stress on the roof decking which is especially worrisome in our climate that gets heavy rain and snowfall. Steep sloped roof products such as tile slate metal and shakes only allow one layer. Like many aspects of a home a roof is fairly complex. The roof is a system composed of layers of different materials that work together to keep wind and weather out of your home.

Begin this layer at the bottom of the roof and add it in horizontal rows with a slight overlap to prevent. Asphalt shingles typically can have one more layer added over the top two roofs total. Roof deck is the roofing material that sits on top of the roof trusses. On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.

Now you just have to decide whether to remove the existing roof shingles or recover the roof. Water shield is the next roofing layer that creates a water proof barrier where ice or water can buildup near the roof eaves. There are quite a few parts of a roof on a home including different layers and. If so you ll likely save quite a bit of money by leaving your existing roofing system in place beneath a new layer of shingles.

Roll out a single layer of roofing felt or tar paper which serves as a moisture barrier. You can usually see the underside of plywood decking from the attic. This synthetic layer which replaces felt paper covers the entire roof deck and is the second line of defense against leaks after the shingles. It s usually a peel and stick product that adheres directly to the roof deck.

For many years it was acceptable to put even the third layer. Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio. Decking most often made out of plywood this roof layer is installed over the framing in a typical roof install.