How many layers of roofing is OK?

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.

Can you have 2 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.

Can a roof be repaired instead of replaced?

Putting off needed repairs might save you money in the short-term, but it will end up costing you a lot more in the long run. For example, it’s sometimes possible — and entirely acceptable — to repair a roof rather than replace it.

What should be included in a roof replacement?

A typical roof replacement quote will normally include the removal and disposal of up to two layers of old shingles. It should also include the installation of new underlayment such as the 30-pound roofing felt, chimney re-flashing, and ice-and-water shield at the eaves and valleys of the roof, as required by the local building code.

How much does it cost to replace a roof on a house?

Based on the $350 to $550 per square pricing range, you can expect to pay between $6,000 and $9,350 for a typical 17 squares asphalt shingle roof replacement project. For comparison, a 30 squares roof on a larger house will cost between $10,500 and $16,500 for a basic 30-year architectural asphalt shingle roof fully installed.

Can you use two layers of asphalt shingles on a house?

They use the same shingles, but these two installation methods are very different. 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.

How much does it cost to install a ridge roof?

Ridge vent roll on display at Lowe’s. With most professional — licensed & insured roofing contractors, the installation cost is usually about 60% of the total cost. Thus, a 3-tab composition shingle roof will cost an average of $350 to $450 per square to install.

When is it time to replace your roof?

A: Tom Silva replies: There are several clues, and the biggest one is age. If your roof is more than 20 years old, there’s a good chance it’s due for replacement. But younger roofs can fail too, so it’s a good idea to inspect a roof at least once a year. Don’t use a ladder, though.

Can you put new roof over two layers of shingles?

If you already have two layers shingles, the decision is made for you. The International Residential Code (R907.3) says that you cannot put a new roof over two or more applications of any type of roof covering.