Often asked: Should You Remove The Old Asphalt Roof When Replacing It With A Metal Roof?

Can you install metal roofing over asphalt?

The short answer is yes, you’re able to roof over your old asphalt roof with a new metal roof under the right circumstances. You’ll be able to save up to 25% in labor costs by not tearing off your old asphalt roof, installing new underlayment, or the fees to dump the old roofing materials.

How do you install metal roofing over asphalt shingles?

You will have a much stronger metal roof if it is being installed into good wood as opposed to rotten wood. 2) Install Underlayment Right over the Shingles before Installing the Metal Roof The second way to install a metal roof over a shingle roof is by applying an approved underlayment right over the old shingle roof.

Is it bad to put a metal roof over shingles?

It’s absolutely fine to install a metal roof over shingles. People are accustomed to thinking of metal roofs as being heavy or cumbersome. In fact, metal roofs are so beneficial because they’re very light. They’re fast to install, and they come in large sheets rather than individual tiles.

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Should old roof 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.

Does a metal roof lower your insurance?

That’s why having a newly installed roof can save you on insurance premiums. Insurance companies also look favorably on metal roofing because research has shown that homes with metal roofs receive less damage from storms and house fires, which means the company is much less likely to have to pay an insurance claim.

Does a metal roof need to be vented?

Proper ventilation is needed to ensure the energy efficiency a metal roof provides. An effectively ventilated metal roof helps to prevent energy waste and excess cooling cost that can occur when attic heat builds up with.

Should you remove shingles before putting on a metal roof?

Your local roofing contractor may recommend tearing off your old shingles before installing a metal roof if any of the following conditions apply: Rough or uneven asphalt shingle roof will affect the metal roof’s appearance. Nails and screws for the metal roof won’t reach far enough into the layers of existing roofing.

How do you keep a metal roof from Condensating?

Traditionally, condensation is managed by insulating the metal roof so that the panel temperature never reaches the dew point. This is often accomplished using vinyl-backed fiberglass insulation to prevent humid air from coming into contact with the cooler metal roof (which may be at or below the dew point).

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Should a metal roof be installed over battens?

By design, some metal roofs MUST be installed over battens, some MUST NEVER be installed over battens, and some can be installed over battens OR solid decking. So, whichever way you go, it’s important to choose the right product and install it per manufacturer specifications.

Why you shouldn’t get a metal roof?

When you have a galvalume or galvanized steel metal roof, you run the risk of rust and corrosion. This happens because of water and water-borne pollutants. Metal roofs are often covered with water-resistant paint, so make sure you inspect the coating. Any damage to the coating increases the risk of rust.

What are the problems with metal roofs?

In this post, we’ll cover four of the most common problems with metal roofing, and how to fix or avoid them.

  • Leaks. One of the most familiar problems with metal roofing (or any roofing, for that matter) is leaking.
  • Oil Canning or Stress Wrinkling.
  • Corrosion.
  • Your Roof Looks Scratched.

Will insurance cover a metal roof over shingles?

Yes, insurance companies like metal roofs. Therefore, the insurance company is less likely to have to pay a claim for roof damage.

Is it OK to put a new roof on top of an old roof?

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.

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What time of year is best to replace a roof?

Fall is considered the best season to replace your roof! Changing seasons can largely impact many factors of your roof replacement – rain, snow, heat, humidity. These weather conditions could also affect how quickly your job can be completed.

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.

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