How Many Layers Of Roofing Are Allowed In Nj

Most areas only allow for a maximum of two layers.

How many layers of roofing are allowed in nj.

If the third layer is new you should not have to do anything for the next. The ice barrier shall consist of not fewer than two layers of underlayment cemented together or a self adhering polymer modified bitumen sheet shall be used in place of normal underlayment and extend from the lowest edges of all roof surfaces to a point not less than 24 inches 610 mm inside the exterior wall line of the building. However in almost all areas it is not acceptable to install more than two layers of roofing on any commercial building. Third roofs are illegal and it s been up to the construction code official to enforce that lacosta said.

Usually shingles are replaced every 15 to 20 years. According to the international existing building code homes can be re roofed one time by applying a second layer of roof shingles over the existing one but after that application begins to wear both layers need to be removed before a brand new roof is installed. Now you just have to decide whether to remove the existing roof shingles or recover the roof. That limit pertains to roofs with up to a 4 12 pitch.

Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio. 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. In some instances 3 layers may be allowed but this is rare. Homeowners are only allowed to add a second layer of shingles.

Why would you want to recover vs tear off. Most building codes allow two layers of organic or fiberglass asphalt shingles on roofs with a 4 12 pitch or less and three layers on steeper roofs. This will also be constrained by other factors. If the structure can support the added weight a typical 20 square 2 000 square foot reroof will cost at least 1 000 less than a tear off job.

The contractor may do a walk on the roof and also inspect from the attic for any rot before installing a second layer of shingles. There are important reasons why this code is in effect. Most building codes allow up to two layers of organic or fiberglass asphalt shingles. On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.

Home inspector nj bergen county with zip codes the g warren inc nj home inspection directory serving these new jersey cities. For many years it was acceptable to put even the third layer.