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Is it OK to put shingles on top of shingles?
You might be able to lay new shingles over existing shingles and avoid the cost of tear-off. If conditions are right, new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. But you must take care to install shingles correctly so they lie flat.
How do you add a second layer of shingles?
Make Repairs Before Reroofing 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.
Is it OK to put a second layer of shingles on a roof?
Adding a second layer of shingles will make your roof hotter because heat gets trapped between the shingle layers. Increased temperatures can lead to premature aging of the shingles. Layering new shingles on top of old ones, which might be curved or damaged, can result in some visible imperfections on your roof.
How long does a reroof last?
Longer lifespan – A new, properly installed shingle roof can last 20 to 30 years, meaning it could potentially outlast an overlay by a decade or more. Increased property value – A brand new roof can add more than $10,000 to your home’s resale value and also acts as a strong selling point.
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.
Why are multiple layers of shingles bad?
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 put a roof over an existing roof?
Roofing over an existing roof is also called reroofing or an overlay. It is important to know that this process can only be done once because you can only have two layers of shingles on your roof. Roof replacement is the process of installing a completely new roof that includes tear off of the old one.
How much does it cost to reshingle a roof?
The average cost to reshingle a roof is between $4,000 and $10,000 depending on the materials used for reshingling your home. Asphalt and metal reshingling is the most common, while more expensive options are clay and solar.
Should I tear off my old roof?
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 many layers of shingles can you have on the roof?
In most states, you’re only allowed to have 2 layers of shingles on a roof for fire safety reasons. However, you’ll still see roofs that have 3 or 4 layers today. If you already have 2 or more layers, a contractor will recommend a full replacement.
Can you lay new roof felt on old?
So the answer is no, you cannot. You should remove the old shingles and felt, and then carefully go over the roof deck removing every last nail or staple left over from the old roof. Then you make repairs to the roof deck; replace any rotted decking. Then you lay down new felt (it comes in long rolls).
How do I know if my roof has two layers?
One way you can tell if a roof has multiple layers is by observing it from the ground. The roof may appear kind of lumpy, and even more so around vents, flues, and skylights. Another thing to observe is the edge of your roof. You can climb a ladder and look at the very edge of your roof’s shingles.
Where can you look on a roof to determine the number of layers?
Where can you look on a roof to determine the number of layers? Look at gable ends or edges of the roof. Also check the nailing pattern from the underside of the roof.
Can you have 3 layers of shingles?
No, you can’t put three layers of asphalt shingles on a roof. In most states, you’re only allowed to have two layers of asphalt shingles on a roof for fire safety reasons. But that doesn’t mean you won’t still see roofs with three or four layers today.
How much does it cost to overlay a roof?
THE COST OF A ROOF DEPENDS ON MANY FACTORS On average, reroofing a house could cost between $5,000-$12,000, but prices are dependent on many different factors.
