Can You Install Tin Roof Over Shingles

If you install metal over shingles if you do decide to install your new metal roof over your old shingles be sure to consult local building codes.

Can you install tin roof over shingles.

Another added benefit is that the layers of your old roof will further insulate your home. Some jurisdictions require a full and complete tear off whenever a new roof is being installed. Codes vary so call your local building department to get the straight story. Most codes now allow no more than two layers of roofing before requiring a complete tear off.

However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Yes you can install a metal roof over shingles. Yes you can. Most codes now allow no more than two layers of roofing before requiring a complete tear off.

However you ll want to check with your local building department before you make any decisions. So if your roof has two layers it may require a complete tear off even though steel is lighter than asphalt. Some people think that they can just install the metal roofing right over the old shingles roof without any barrier in between but this is highly not recommended. Building officials in some areas will only allow a re roof over one layer of shingles while officials in other places may allow you to place the roof over two layers of shingles.

The problem with this is that as the metal heats up and expands or cools down and contracts it moves a little on the roof. Step 1 make a slat board base on top of the shingles. Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise.