“Can I put a second layer of shingles on my roof?” You can, but you probably shouldn’t! Known as a layover, putting a second layer of shingles on your roof is in most cases inadvisable and a job that Proven Roofing is likely to even turn down.
Is it OK to put two layers of shingles on a roof?
There are already two layers of shingles on your roof – Most building codes only allow two layers of any type of roofing on your home. So if there are already two layers, the choice is made for you. You need to tear off the roof and install a new one. … To fix it, you’ll need to remove the existing roof.
How do you add a second layer of shingles?
Remove shingles from any area where you notice deterioration or damage to the roof decking. Replace the damaged roof deck with 3/4-inch OSB board. Add a layer of shingles over the newly repaired area before you install your second layer of shingles.
Can you put new shingles on top of old ones?
The answer is yes, you can lay new roof shingles over old ones. … You can’t do it with wood or slate, for example, and you should never mix materials, such as laying asphalt shingles over cedar shakes. Also, the old roofing has to be in pretty good condition.
Can you shingle over one layer of shingles?
You might be able to lay new shingles over existing shingles and avoid the cost of tear-off. … Some roofers install a layer of waterproof shingle underlayment (WSU) over the existing shingles at the eave end, as would be done for a roof laid on bare sheathing. This provides added protection against ice dams.
Does the roof have more than 1 layer of roofing material?
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.
Should old shingles be removed?
If any areas of the roof have become severely damaged, it’s usually better to remove the old shingles and start from scratch. … If you’re going to add a roof on top of an old one, it’s a good idea to remove any loose shingles and apply a new layer of 30-pound roofing felt before laying the new shingles.
How much does a second layer of shingles cost?
ft. The cost per square depends on the type of shingles and the brand. They generally range between $55 on the low end and $600 on the high end, with an average of $100 to $250 per square of architectural shingles. The roofing labor cost per square is $100 to $250.
What is the problem with more than two layers of shingles?
Warranty issues: Most shingle warranties do not apply when shingles are layered over existing roofing, according to InterNACHI. Two layers of shingles trap more heat, which in turn damages the shingles and shortens the life span of the roof.
How much does it cost to add a layer of shingles to a roof?
Cost to Install Shingles
On average, you can expect to pay a contractor $3 to $6 per square foot to install your roofing. Prices can be higher if you choose a unique or complex shingle.
Can I put new roof felt over old?
It’s best to tear down to the bare roof deck so you can also check for any decking damage. But you can also add another layer of felt on top of existing. This will add additional thickness to the roof, so be sure that fasteners (nails) are long enough to penetrate both layers.
Can you put plywood over old shingles?
The new plywood will have to be nailed to the rafters or roof trusses. … But, with the old plywood left in place, it will be considerably more difficult to locate the rafters to ensure proper nail placement.
How many times can you shingle over a roof?
Depending on the type of roof material used, the number of layers added to a roof range from two to three times. House roofs should never exceed three layers of shingles. Adding additional layers without excavation can save homeowners up to $1,000 in labor.
How do you know when to replace shingles?
8 Potential Signs That Your Roof May Need To Be Replaced:
- Shingle edges are curled or shingle tabs are cupped.
- Bald spots where granules are missing.
- Cracked shingles.
- Your roof is at least 20 years old; while many shingles today are produced for durability, many factors can accelerate the aging of shingles.
Will black shingles make house hotter?
Black and dark-colored roofs.
In general, dark-colored roofing materials will absorb the heat and cause your attic and/or the top of your house to be warmer than a lighter colored material.