How Many Layers Of Roof Shingles Are Allowed In New York

Any amount of short term savings you might see from a layover roof installation is not far outweighed by the longer term peace of mind that comes from knowing that the integrity of the decking has been confirmed.

How many layers of roof shingles are allowed in new york.

Most building codes allow up to two layers of organic or fiberglass asphalt shingles. Roofing layers from the framing to the shingles. Regulations allow a maximum of two layers of shingles on a roof but experts say you shouldn t lay asphalt shingles over an existing roof. On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.

Asphalt shingles typically can have one more layer added over the top two roofs total. For example cedar or tile roofs are only allowed one layer. Eliminating the tearoff can easily save 1 000 or more on a new roof but you re really just delaying the cost. So we ll start at the bottom of the deck and work our way up through all the roofing layers until we reach the shingles and sunshine above your roof.

Although the new york state building code does allow for up to two layers of roof materials. Understanding the different layers of a roofing system is crucial to having a successful project and positive experience when hiring a roofing contractor. In the portland area as of 2018 the current code allows up to three layers if the current layer is in good condition. Framing includes the roof trusses that sit at the top of your house and support the weight of all the materials used to build your roof.

Generally it is fine to have three layers of shingle codes but you should check this is the case with your local building permit people and you should make sure that your roof and the rest of the structure have the strength to cope with the extra weight. When it s time to replace the roof again and you have no choice but to start anew two layers is the maximum allowed in most areas you ll have to pay extra for the two layer tearoff and disposal. However this depends upon the roof materials. The dark areas on the ceiling peeling paint on the roof overhang or shingle pieces scattered about the yard tell one story.

Each part of the system contributes to protecting your home from severe weather. Adding a second or third layer of shingles adds significant weight to the structure. The soundness of the building you re re roofing is another consideration. Steep sloped roof products such as tile slate metal and shakes only allow one layer.

For many years it was acceptable to put even the third layer.