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Is it OK to overlay 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.

Can you put a roof over an existing roof?

Roofing over an existing roof is also called reroofing or an overlay. It is the process where roofers install a new roof over your existing one, i.e. add a new layer of shingles, which means that the old roof will not be removed/teared off.

Is it OK to have two 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.

Should I tear off my old shingles?

You need to tear off the roof and install a new one. Current shingles are curling or in bad shape – The new shingle roof should lay flat on your old one. But if the current roof is curling, this isn’t possible. You’re better off removing the old roof.

Can you lay new roof felt on old?

If re:felting over existing felt then the total area in question should be primed first to allow the new felt to adhere to the old as this is the only way to be sure the two felts bond together.

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. Therefore, layering has advantages.

Is it better to nail new shingles over an existing roof?

Nailing new shingles over existing ones is less expensive and faster, requiring less labor, but it also means you lose the chance to assess the sheathing for signs of water damage. If your roof is in good shape but has some damage to one side from a downed tree or has lost shingles in a wind storm, an overlay is worth considering.

Can you put asphalt shingles over plywood roof?

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. Nailing new shingles over existing ones is less expensive and faster, requiring less labor, but it also means you lose the chance to assess the sheathing for signs of water damage.

When do you know it’s time to replace your roof?

The shingles are cracked. Cracked shingles are typically a result of wind damage. If just a few shingles are cracked, you can certainly replace them. “If the cracking isn’t isolated to one particular area and it’s random throughout the roof, that’s a telltale sign that you should start thinking about a new roof,” says Graham.

Can you put a new roof on top of an existing roof?

If you go this route, definitely include it in your listing description. A less expensive option, this approach involves applying a new roof on top of the old one (without removing the underlying roof). Cosmetically, it will look the same, and you can still market it to buyers as a new roof.

Nailing new shingles over existing ones is less expensive and faster, requiring less labor, but it also means you lose the chance to assess the sheathing for signs of water damage. If your roof is in good shape but has some damage to one side from a downed tree or has lost shingles in a wind storm, an overlay is worth considering.

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. Nailing new shingles over existing ones is less expensive and faster, requiring less labor, but it also means you lose the chance to assess the sheathing for signs of water damage.

Which is easier to install new shingles or 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 the shingles correctly so they lie flat. And a good job involves installing new flashings rather than relying on the existing ones. Reroof jobs are sometimes done without replacing flashings.

The shingles are cracked. Cracked shingles are typically a result of wind damage. If just a few shingles are cracked, you can certainly replace them. “If the cracking isn’t isolated to one particular area and it’s random throughout the roof, that’s a telltale sign that you should start thinking about a new roof,” says Graham.