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Just 2 layers I recommend, because if you add an additional layer the roof will get damage and collapsed.

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Q: How many layers of roof shingles can go on a house?
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Related questions

How many layers of shingles can be put on your roof?

Usually not more than two.


How do you prevent a roof of a house from rusting?

Use wooden shingles.


Is there a written standard regarding hail damage to fiberglass shigles in the US?

As far as I know there is not. The type of roof, way that the shingles were installed, age of the shingles, number of layers of shingles, and many other factors all affect how a roof ages. I would suggest that if you are dealing with your insurance company you contact an engineering firm who specializes in this to conduct a study of your roof.


Can architectural shingles be applied over old shingles?

yes you can place new shingles over old shingles as long as the first layer of shingles are not curled....you will need 1 1/4 - 1 1/2 roofing nails..and 2 courses is the limit...follow same procedure as first roof installation


For what purpose are shingles used?

Shingles are used to prevent water from entering a home through a roof. They are placed in the upper section of the house overlapping eachother, when it rains, the water just floats out of the roof.


What is under the shingles on the roof of a house?

Most will have a layer of plastic-like fabric underneath but older shingles may just have plywood underneath.


Asphalt Shingles?

form_title= Asphalt Shingles form_header= Put a new roof on your home with asphalt shingles. What color shingles do you need? *= _ [50] What size shingles do you need?*= _ [50] Are you replacing a whole roof?*= () Yes () No How old is the roof?*= _ [50]


How often should the roofing on a house be replaced?

The material used to make the shingles on a roof determines how often a roof needs to be replaced. For example, barring damage from extreme circumstances, slate shingles will probably last the entire lifetime of a house, where as asphalt shingles will probably need to be replaced every 15 to 30 years.


How many sq' of shingles is needed to do a 30'x50' house?

A 30x50 roof has 1,500 square feet which is 15 squares. 3 bundles of shingles equals 1 square so you will need about 45 bundles.


How many bundles of shingles do you need for a 12 by 20 Gambrel roof?

Hi, do you mean how many bundles of shingles would be required for a 40 x 20 roof?


How do you figure how many bundles of roof shingles for a roof 32x74?

100 sq ft = 1 square.


How long will unused roof shingles last?

Depends on weather, and brand. Generally shingles on a normal house will last 15 to 20 years in normal weather.