House roofs should never exceed three layers of shingles. Adding additional layers without excavation can save homeowners up to $1,000 in labor. Therefore, layering has advantages. … High quality asphalt shingles are the best roofs to install multiple layers on.
How many layers of roofing shingles are allowed?
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. 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.
Can you sell a house with 3 layers of shingles?
Question: If I have more than one layer of roofing on my home, should I be concerned about resale? The short answer is “yes.” … When I started my real estate career, I sold homes with three layers of roofing. Sometimes even with composition shingles (also known as asphalt shingles) over wood/shake shingles.
Is it OK to overlay shingles?
A: In general, it is not good practice to overlay a traditional asphalt shingle roof versus a complete tear off and replacement for the very reason you stated: you can’t examine the decking to determine if there is any damage that needs repaired.
Is it OK to put two layers of shingles on a roof?
Two layers of shingles trap more heat, which in turn damages the shingles and shortens the life span of the roof. … Adding a second layer could compromise the structure of your roof. Problems fixing leaks: A second layer of shingles only complicates the job when a roofer is trying to fix a leak.
Can you have 2 layers of shingles?
As mentioned above, homeowners are legally limited to two layer of roof shingles. Therefore, if you already have two layers, you’ll need a full tear-off. Additionally, if your roof is severely damaged, it likely won’t be able to support the weight of a reroof and will need to be torn off.
Is 3 layers of roof bad?
The third layer is a waste- only lasts a few years (maybe). Most importantly, the extra layers adds a lot of weight (pushing the load limit for the roof).
Can a house have two roofs?
Overlay: Putting on a second layer
Most building codes allow for two layers of asphalt shingles on a house, so stripping off everything down to the plywood sheathing may not be your only choice.
Is it better to remove old shingles?
While a repair job can often be more convenient and somewhat more cost-efficient, placing new shingles over old ones is never a good idea. Whether repairing one section of roof, or a replacing a whole one, it’s always best to pull up the old shingles before putting down the new ones.
Should I tear-off my old shingles?
In most cases, more than two layers of roofing shingles does require a tear-off. Laying new shingles over old shingles is easily prone to leaks and reduces the life of the new shingles. This alone ought to be reason enough to do a tear-off; it’s just a bad value not to.
How long does a reroof last?
The 26 gauge and 29 gauge cheaper metal roofing options can last for up to 25 years if taken care of. On the high-end, the 24 gauge metal roofing option can last for up to 50 years. However, most manufacturers offer a 20-year warranty and some even a lifetime warranty which is dependent on the metal used.