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

The old shingles become a layer that can foster mildew growth and trap layers of moisture.

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

So how many layers of roof shingles are allowed. 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. This will also be constrained by other factors. Bridging using the bridging method shingles are installed starting at the lower edge of the roof as if they were being installed directly onto sheathing.

However this depends upon the roof materials. Also building codes are subject to change frequently so it s important that you know what current local codes allow. In some instances 3 layers may be allowed but this is rare. Some home insurance policies will not cover roof repairs that include multiple layers of shingles.

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. In the portland area as of 2018 the current code allows up to three layers if the current layer is in good condition. Bridging and nesting are methods for covering standard size shingles such as 3 tab with a layer of larger metric size shingles such as laminated shingles. 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.

That limit pertains to roofs with up to a 4 12 pitch. It s also worth remembering that simply reroofing over your old shingles may lead to a less durable roof. Finally consider whether reroofing over the.