How many layers of shingles are allowed on a roof.
How many layers of shingles are allowed on a roof in ohio.
Fasteners for asphalt shingles shall be galvanized stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 2 67 mm shank with a minimum 3 8 inch diameter 9 5 mm head of a length to penetrate through the roofing materials and a minimum of 3 4 inch 19 1 mm into the roof sheathing.
New roof coverings shall not be installed without first removing all existing layers of roof coverings where any of the following conditions exist.
I live in milford pa how many layer of asphalt are allowed on a roof.
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.
When they tell me what neighborhood they re in i can also make a good guess about how many layers of shingles are already on the roof.
If the roof is say eight years old it probably just needs a repair.
December 18 2019 by taylor made roofing signs that your roof has reached the end of its life are typically fairly obvious.
Asphalt shingles typically can have one more layer added over the top two roofs total.
If it s 15 years old and they ve noticed loose granules washing off the shingles or running out of the downspouts it s a reroof candidate.
On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.
For many years it was acceptable to put even the third layer.
Now you just have to decide whether to remove the existing roof shingles or recover the roof.
Other factors to consider.
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.
Three layers of roof shingles too many for an insurance company.
I m not sure about milford but i personally would never have more than 2 layers for all the reasons stated in my post above.
For example cedar or tile roofs are only allowed one layer.
Adding a second or third layer of shingles adds significant weight to the structure.
Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio.
Once you have discovered how many layers of roof shingles are allowed the next decision you should make is whether you will have the existing shingles completely removed to make way for two or three new layers or whether you will have another layer of shingles placed on top of the existing layer.
907 3 recovering versus replacement.
Steep sloped roof products such as tile slate metal and shakes only allow one layer.
Consistent leaks shingle loss and mold growth can all point to the need for a new roof.
The soundness of the building you re re roofing is another consideration.
