How Many Layers Of Roofing Are Allowed In Nj

Home inspector nj bergen county with zip codes the g warren inc nj home inspection directory serving these new jersey cities.

How many layers of roofing are allowed in nj.

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. If the third layer is new you should not have to do anything for the next. In lower bergen county new jersey alpine nj 07620 home inspection for bergenfield nj 07621 area we have home inspectors for bogota nj 07603 area licensed home inspector for carlstadt nj 07072 area g warren has licensed home inspector for cliffside park nj. This will also be constrained by other factors.

That limit pertains to roofs with up to a 4 12 pitch. Most building codes allow up to two layers of organic or fiberglass asphalt shingles. Standard roofing practices allow for three layers of roofing shingles. 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.

On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing. Usually shingles are replaced every 15 to 20 years. 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. In some instances 3 layers may be allowed but this is rare.

There are important reasons why this code is in effect. Homeowners are only allowed to add a second layer of shingles. Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio. However in almost all areas it is not acceptable to install more than two layers of roofing on any commercial building.

Most areas only allow for a maximum of two layers. Why would you want to recover vs tear off. 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. Now you just have to decide whether to remove the existing roof shingles or recover the roof.

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. 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.