Is 2 layers of shingles OK?

Is 2 layers of shingles OK?

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.

What is the life expectancy of a composite roof?

Homeowners with wood shake roofs should expect them to last about 30 years, while fiber cement shingles last about 25 years and asphalt shingle/composition roofs last about 20 years, the NAHB found. Climate and weather conditions, such as snow, hail and hurricanes, can cut the life span of all types of roofs.

Is it acceptable to reroof an existing roof that already has two layers of roofing installed?

Two Layers Already If you’ve already installed a second layer of shingles over an existing one, you shouldn’t do it again. Adding more layers of shingles can violate local building codes and can add too much weight to your roof. You must always check local regulations before performing a reroofing.

How much does a composite roof cost?

The average roofing installation price for a composite plastic shingle roof costs anywhere between $25,000 to $50,000 depending on the slope, pitch, and size of your roof. You can expect to pay $4 to $6 per sq. foot or $400 to $600 per square installed on a standard sized single story home.

Is it OK to put new shingles over old ones?

You might be able to lay new shingles over existing shingles and avoid the cost of tear-off. Installation is easier than for a tear-off job because you can use the existing shingles as guides for laying the new ones. But you must take care to install shingles correctly so they lie flat.

Can I overlay roof sheathing?

Yes, it is quite common to add solid sheathing over the top of the spaced sheathing. The added weight will be off-set by removing the heavier existing tile roofing and the heavier wood shingles and shakes (when they are soaked with water).

How much does it cost to repair a rubber roof?

Repairing a flat rubber roof costs between $4 and $10 per square foot. Rubber is a popular material to use in constructing flat roofs because it is lightweight and can withstand sun and water damage.

How often should a composite roof be replaced?

Asphalt shingles and composite roofs are the most common materials and tend to also last the least amount of time (usually about 20 years on average) before requiring a replacement. Fiber cement shingles will last a little longer at about 25 years. Wood shake roofs should last up to 30 years.

Is composite roof good?

Composite shingles are most recognized for their durability. While other roofing shingles last an average of 15-20 years most composite roofing is warrantied from 30-50 years. Some composite shingles are even guaranteed to last a lifetime.