How Many Layers Of Shingles Are Allowed On A Roof In Indiana

Three layers is getting up there in weight as well.

How many layers of shingles are allowed on a roof in indiana.

The average 30 square roof uses 90 bundles of shingles and a bundle of asphalt roofing shingles weighs about 100 pounds which means you re putting roughly 9 000 additional pounds of weight on your roof. 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. That limit pertains to roofs with up to a 4 12 pitch.

However as a general rule you should not add extra shingle layers to your roof if it already has two shingle layers. Asphalt shingles typically can have one more layer added over the top two roofs total. Most building codes allow up to two layers of organic or fiberglass asphalt 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.

Steep sloped roof products such as tile slate metal and shakes only allow one layer. Truth be known there are ways of hiding how many layers are on the roof. An owner must complete and sign the disclosure form and submit the form to a prospective buyer before an offer is accepted for the sale of the real estate. 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.

For many years it was acceptable to put even the third layer. If you have two layers of shingles that are worn out a good alternative would be to remove those layers and replace them with two new ones as opposed to adding on a third layer. I would tear it all off if your going through the trouble. So any contractor that says he can tell definitly tell without rippng is pulling your leg and it is a common thing to miss in a home insp.

Indiana law ic 32 21 5 generally requires sellers of 1 4 unit residential property to complete this form regarding the known physical condition of the property. 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.