House Roof Layers

Disadvantages to a roof recover.

House roof layers.

Most building codes allow for two layers of asphalt shingles on a house so stripping off everything down to the plywood sheathing may not be your only choice. Below we created a very helpful custom diagram that illustrates the various features and layers of a typical roof. A typical roof replacement quote will normally include the removal and disposal of up to two layers of old shingles. For more information about roofs check out our types of roofs article and diagrams.

Underlayment is usually felt or fiberglass paper that covers the entire roof deck. Most roof decking is made from sheets of plywood. It s usually a peel and stick product that adheres directly to the roof deck. Water shield is the next roofing layer that creates a water proof barrier where ice or water can buildup near the roof eaves.

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. If two layers already exist you ll need to remove the old layers before installing a new layer of shingles. Like many aspects of a home a roof is fairly complex.

In most areas building codes allow for up to two layers of shingles installed on a roof. It should also include the installation of new underlayment such as the 30 pound roofing felt chimney re flashing and ice and water shield at the eaves and valleys of the roof as required by the local building code. It provides structure by tying the trusses and joists together. The roof is a system composed of layers of different materials that work together to keep wind and weather out of your home.

The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says. There are quite a few parts of a roof on a home including different layers and features. Begin this layer at the bottom of the roof and add it in horizontal rows with a slight overlap to prevent. On the surface a roof looks like a simple layering of shingles but it s actually much more complex than the average homeowner may realize.

Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles.