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

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How Many Layers Of Shingles Are Allowed On A Roof Roofing Contractor Sullivan Il Central Roofing Llc

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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.

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

The soundness of the building you re re roofing is another consideration. It is acceptable to have a maximum of three layers of shingles installed on a roof. I don t know whats legal in illinois but the general rule on roofing is a max of 2 layers on a roof. For example cedar or tile roofs are only allowed one layer.

So we ll start at the bottom of the deck and work our way up through all the roofing layers until we reach the shingles and sunshine above your roof. Other factors to consider. For example there s a starter course of roofing shingles installed at the eaves before the roofing shingles you can see. The weight of 5 layers of shingles on a roof is a bad thing in itself surely in snow country.

Adding a second or third layer of shingles adds significant weight to the structure. In most cases two layers of shingles is advisable and three aren t normally required but if you live in an area that suffers from particularly strong wind or lengthy periods of heavy rain then you may want to consider a third layer. Most building codes allow up to two layers of organic or fiberglass asphalt shingles. Roofing layers from the framing to the shingles.

Some municipalties allow only two layers. If the current roof is in poor shape re covering may not be a sound choice. 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. A roofing contractor will know exactly how many layers of roof shingles are allowed in your area for your building but it is normal that you will be permitted up to three layers of shingles.

Your three layer roof is definitely a potential structural concern and homeowners insurance companies might consider three layers of roof shingles. When it s time to replace the roof again and you have no choice but to start anew two layers is the maximum allowed in most areas you ll have to pay extra for the two layer tearoff and disposal. 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. What are the indicators that a shingle roof needs to be replaced.

That limit pertains to roofs with up to a 4 12 pitch. There are a few reasons why i don t like multiple layers of roofing shingles on a roof. Eliminating the tearoff can easily save 1 000 or more on a new roof but you re really just delaying the cost.

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