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.
How many layer of roof shingles in indiana.
Asphalt shingles typically can have one more layer added over the top two roofs total.
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.
Most building codes allow up to two layers of organic or fiberglass asphalt shingles.
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.
Three layers of roof shingles too many for an insurance company.
Here are the pros and cons.
First of all multiple layers of shingles simply means layering a new asphalt shingle roof on top of the old one rather than stripping the roof completely to expose the sheathing and replacing it with new shingles.
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.
That limit pertains to roofs with up to a 4 12 pitch.
Now you just have to decide whether to remove the existing roof shingles or recover the roof.
Steep sloped roof products such as tile slate metal and shakes only allow one layer.
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Pros to overlaying a shingle roof.
Shingles are the element that most homeowners are familiar with as it is the layer you can see from the outside of your home and it is an important aesthetic aspect.
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.
Robin asks i was told by my insurance company that they don t cover a roof that has three layers of roof shingles on it so i ve gone to another carrier for an estimate.
This other carrier would charge me quite a bit because i.
As a general contractor in the state of indiana and a licensed insurance adjuster the recommended number of layers of shingles is 2 most good contractors will not install a 3rd layer of shingle because of the weight factor we recommend striping the entire roof to check to sheathing install new felt and then install 1 layer of single most insurance companies will not pay for storm damage.
If the structure can support the added weight a typical 20 square 2 000 square foot reroof will cost at least 1 000 less than a tear off job.
Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio.
Benefits of adding multiple shingle layers.
For many years it was acceptable to put even the third layer.
Most building codes allow this but is it a good idea.
On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.
Asphalt shingles come in two major types 3 tab and architectural.
