My Roof Has 4 Layers

Steep sloped roof products such as tile slate metal and shakes only allow one layer.

My roof has 4 layers.

The five main types of roofing materials are asphalt shingles cedar shakes concrete or ceramic tiles metal sheets and rubber used for flat roofs. Here are the layers of a roof in order of application bottom to top. Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio. Roofing material is where most homeowners focus their attention with hundreds of materials styles and color to pick from.

Asphalt shingles typically can have one more layer added over the top two roofs total. If your roof is in good shape but has some damage to one side from a downed tree or has lost shingles in a wind storm an overlay is worth considering. This other carrier would charge me quite a bit because i d only have homeowners insurance with them and they re supposedly the only ones who will deal with me concerning the roof. I have a 1949 1600 sf under roof with 8 12 pitches valleys and hips 2 6 rafters on 16 on center sheathed with 3 4 center matched lumber going over at least 1 layer of 3 tab shingles a partial tear took off the old tabs and left a nice wavy surface in pretty good shape.

I was told by my insurance company that they don t cover a roof that has three layers of roof shingles on it so i ve gone to another carrier for an estimate. For many years it was acceptable to put even the third layer. First of all multiple layers of shingles simply means layering a new asphalt shingle roof on top of the old one rather than stripping the roof completely to expose the sheathing and replacing it with new shingles. 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.

It must be installed the full length of all valleys. Here are the pros and cons. If it needs to be replaced the insurance policy will only cover the replacement of the top layer. You can usually see the underside of plywood decking from the attic.

So let s say we have a hail storm and the roof takes a beating. It provides structure by tying the trusses and joists together. 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. Most building codes allow this but is it a good idea.

Now you just have to decide whether to remove the existing roof shingles or recover the roof. On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing. If the roof has multiple layers typically the insurance company will only insure the top layer. Decking most often made out of plywood this roof layer is installed over the framing in a typical roof install.