House Roof Layers

A typical roof replacement quote will normally include the removal and disposal of up to two layers of old shingles.

House roof layers.

Underlayment is usually felt or fiberglass paper that covers the entire roof deck. 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. The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says. Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles.

It s usually a peel and stick product that adheres directly to the roof deck. Disadvantages to a roof recover. Most roof decking is made from sheets of plywood. Nailing new shingles over existing ones is less expensive and faster requiring less labor but it also means you lose the chance to assess the sheathing for signs of water damage.

For more information about roofs check out our types of roofs article and diagrams. Begin this layer at the bottom of the roof and add it in horizontal rows with a slight overlap to prevent. If two layers already exist you ll need to remove the old layers before installing a new layer of shingles. Roll out a single layer of roofing felt or tar paper which serves as a moisture barrier.

The roof is a system composed of layers of different materials that work together to keep wind and weather out of your home. There are quite a few parts of a roof on a home including different layers and features. You can usually see the underside of plywood decking from the attic. Most often made out of plywood this roof layer is installed over the framing in a typical roof install.

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. 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. Water shield is the next roofing layer that creates a water proof barrier where ice or water can buildup near the roof eaves. Like many aspects of a home a roof is fairly complex.

Below we created a very helpful custom diagram that illustrates the various features and layers of a typical roof.