Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio.
How many layers of roofing are allowed in washington state.
If the roof is say eight years old it probably just needs a repair.
Although the new york state building code does allow for up to two layers of roof materials.
On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.
Should i have my old roof removed before a new one is installed.
Ewert at 503 373 7529 or e mail questions to mike d ewert state or us.
Steep sloped roof products such as tile slate metal and shakes only allow one layer.
For more information or questions contact micheal d.
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.
For many years it was acceptable to put even the third layer.
Roof coverings such as shingle tiles rubber plastic or metal must be rated as a class a fire retardant material.
For example if you already have 2 layers of asphalt composition shingles on your roof you cannot add a third.
Eliminating the tearoff can easily save 1 000 or more on a new roof but you re really just delaying the cost.
1 how many layers are on the existing roof in washington state it is a law that you can only have 2 layers of roofing on your structure.
R907 3 recovering versus replacement.
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.
Asphalt shingles typically can have one more layer added over the top two roofs total.
This is a requirement for homeowners insurance in washington state and has been built into the local building codes to prevent the use of inferior roof covering products and to help facilitate updating homes from the old roofing products to the new roofing products.
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.
Any amount of short term savings you might see from a layover roof installation is not far outweighed by the longer term peace of mind that comes from knowing that the integrity of the decking has been confirmed.
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.
The previous code allowed up to three layers of roofing before removal was required.
New roof coverings shall not be.
Re roof or strip the roof down.
