How To Count Roof Layers

It provides structure by tying the trusses and joists together.

How to count roof layers.

Second layer was plywood over tin and shingles installed. Steep sloped roof products such as tile slate metal and shakes only allow one layer. Outside of the u s a degree angle is typically used. This gives us a 3d roof area of 1 625 sq ft.

Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. R value of various materials. If you have a simple gable roof you ll only need to measure and sum up the 2 planes of the roof.

He had gotten about 3 4 of the way through the job before the city shut them down. For many years it was acceptable to put even the third layer. Here are the layers of a roof in order of application bottom to top. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

It appears to be 2 different colors for the asphalt shingle layers which made me think it was 2 asphalt shingle roofs. Find the square footage of the roof. Needless to say we declined the job due to excessive cost and restructuring the roof. Asphalt shingles typically can have one more layer added over the top two roofs total.

Third layer was another layer of asphalt shingles. Finally the forth layer was wood shakes not kidding it was crazy. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same. Measure the length and width of each portion of the roof multiply length by width for each plane and then add the planes together for the total square footage.

For estimating purposes we also assume that there is a chimney a couple of dormers and two layers of old shingles that need to be torn off and removed before a new roof can be installed. Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results. There is a base wood shake layer and the asphalt shingle layers. My dad has said to have done 7 layer tear offs.

First layer was the original tin roof. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. My dad ended up landing the job. You can usually see the underside of plywood decking from the attic.

Decking most often made out of plywood this roof layer is installed over the framing in a typical roof install. For a very good introductory overview article on r value see r values over at the website of. If you are knowledgeable in being able to calculate from this view it would be hugely helpful. Assuming this is a hip roof we multiply this by 1 1 which gives us roughly 18 squares or 1 800 square feet of the roof surface.

We have done some 5 layer tear offs redecks.