Usually shingles are replaced every 15 to 20 years.
How many layers of roofing are allowed in ny.
However this depends upon the roof materials.
However if it is now time for a new roof building code requires that all three layers have to be removed.
In the portland area as of 2018 the current code allows up to three layers if the current layer is in good condition.
For example cedar or tile roofs are only allowed one layer.
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.
December 18 2019 by taylor made roofing signs that your roof has reached the end of its life are typically fairly obvious.
Re roof or strip the roof down.
Adding more weight than your roof is designed for can cause structural damage to the building and cause a dangerous situation for anyone in it.
Although the new york state building code does allow for up to two layers of roof materials.
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.
Three layers of roof shingles too many for an insurance company.
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.
Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio.
Re roof or strip the roof down.
Standard roofing practices allow for three layers of roofing shingles.
If the third layer is new you should not have to do anything for the next 15 to 20 years.
The soundness of the building you re re roofing is another consideration.
I live in milford pa how many layer of asphalt are allowed on a roof.
The weight of the roof is of concern roof trusses and decks are only able to hold up so many layers of roofing.
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.
Another great perk of tearing off is that it exposing the roof deck.
How many layers of shingles are allowed on a roof.
Now you just have to decide whether to remove the existing roof shingles or recover the roof.