How Many Layers Of Roofing Are Allowed In Nyc

For example cedar or tile roofs are only allowed one layer.

How many layers of roofing are allowed in nyc. That limit pertains to roofs with up to a 4 12 pitch. 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. Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles. 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.

Disadvantages to a roof recover. For many years it was acceptable to put even the third layer. The soundness of the building you re re roofing is another consideration. However in almost all areas it is not acceptable to install more than two layers of roofing on any commercial building.

Two layers is the maximum in most areas but some building codes allow only one. The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says. On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing. Most building codes allow up to two layers of organic or fiberglass asphalt shingles.

Your three layer roof is definitely a potential structural concern and homeowners insurance companies might consider three layers of roof shingles. 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. For example towns in climates with heavy hailstorm activity or significant ice dam problems may not allow multiple roofing layers. How many should there be.

To get straight to the point there should be only 2 layers of roofing materials on your roof. Although the new york state building code does allow for up to two layers of roof materials. Why would you want to recover vs tear off. Homeowners have to also keep in mind that most roofing materials are heavy and can easily weigh over a ton.

Local codes might not allow re roofing. However this depends upon the roof materials.