Layers Of Roof Construction

The tear off quote is 4 000.

Layers of roof construction.

On 4 12 or greater slopes the balance of the roof shall be one layer of 15 felt. New materials are 5 500. On roof slopes of 2 12 to 4 12 the remainder of the roof shall be two layers of 15 felt applied in shingle fashion or 1 layer of ice dam protection. Assuming your roofing contractor is using standard 36 wide 15 roofing felt double coverage means that each layer of felt put down across the roof laps 19 over the upper half of the previous course.

Roofing second layer of shingles roofing. Water shield is the next roofing layer that creates a water proof barrier where ice or water can buildup near the roof eaves. When it s time to replace your roof there are several factors that might lead your roofing professional to recommend adding shingles on top of your existing layers. Five best practices reasons for using roofing felt underlayment.

It s usually a peel and stick product that adheres directly to the roof deck. Underlayment is usually felt or fiberglass paper that covers the entire roof deck. Most often made out of plywood this roof layer is installed over the framing in a typical roof install. It is a waterproofing layer made of regular felt stacked above the solid decking board and then completely covered by the shingles or other roofing materials.

That limit pertains to roofs with up to a 4 12 pitch. Note that roof systems typically include more than one type of material. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Epdm rubber metal tiles asphalt shingles modified bitumen asphalt bur pvc copper panels roofing slates and cedar shingles.

So anywhere along the gable end that you can see the felt you ll see two layers. Most roof decking is made from sheets of plywood. The first course starts with an extra 1 2 wide run. However some areas on the roof have up to five layers of shinles.

It provides structure by tying. 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. Here are the layers of a roof in order of application bottom to top. Roof covering typically of flat and rectangular shapes and made of various materials such as slate wood flagstone plastic metal and composite materials.

The roof has varying number of layers with most areas having two layers of old shingles.