How Many Layers Of Roofing Are Allowed In Oregon

Homeowners have to also keep in mind that most roofing materials are heavy and can easily weigh over a ton.

How many layers of roofing are allowed in oregon.

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. That limit pertains to roofs with up to a 4 12 pitch. For many years it was acceptable to put even the third layer. However in almost all areas it is not acceptable to install more than two layers of roofing on any commercial building.

People often ask our portland roofers how many layers of shingles are allowed on my roof in oregon. Adding a second or third layer of shingles adds significant weight to the structure. Most building codes allow a structure to have two roof membranes. 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.

Item 3 in section r907 3 requires old roofing to be removed when there are two or more layers of roof covering. To get straight to the point there should be only 2 layers of roofing materials on your roof. The soundness of the building you re re roofing is another consideration. However portland will allow up to three residential roofing layers if the structure can support it.

Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio. For example cedar or tile roofs are only allowed one layer. However this depends upon the roof materials. Your three layer roof is definitely a potential structural concern and homeowners insurance companies might consider three layers of roof shingles.

October 3 2019 west valley city how many layers of roofing are allowed reroofing roof layer roof replacement roofing service contractor by admin although roofs are meant to last decades there will come a time that they will deteriorate and need to be replaced. Most building codes allow up to two layers of organic or fiberglass asphalt shingles. In the portland area as of 2018 the current code allows up to three layers if the current layer is in good condition. 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.

The previous code allowed up to three layers of roofing before removal was required.