Most codes now allow no more than two layers of roofing before requiring a complete tear off.
Installing shingles over metal roof.
You will need to lay some 1 by 4 inch pine boards lengthwise every two feet on your roof.
So if your roof has two layers it may require a complete tear off even though steel is lighter than asphalt.
The metal used for the roof can be tin copper aluminum or steel.
A benefit to doing it this way is that you can see if there is any rotten plywood that needs to be replaced before installing the new roof.
Most codes now allow no more than two layers of roofing before requiring a complete tear off.
Make a slat board base on top of the shingles.
1 remove the shingles before installing the metal roof the first way to install a metal roof over shingles is by completely removing the old shingles before installing the new metal roof.
Install your metal edging around the perimeter of your roof.
In terms of performance many homeowners choose a steel roof making it the most popular option when it comes to creating a metal roof over existing shingles.
March 11 2020 by safe harbor roofing reroofing is the practice that involves installing a new roof over an existing one.
However you ll want to check with your local building department before you make any decisions.
Yes you can and by doing so you save in the labor and hassle of tearing off the old roof and you won t be contributing to filling our landfills.
Ideally start on the left side of the hill by nailing it on the right side lay the next shingle cap over the first ensure it covers the nail on the fist shingle nail it down and continue this way to the last shingle cap.
Should old shingles be removed before new installation.
Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise.
Can i install a new metal roof over shingles.
Yes you can install a metal roof over shingles.
So if your roof has two layers it may require a complete tear off even though steel is lighter than asphalt.
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.
Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise.
Installing metal roofing over shingles is the best solution.
Install the metal edging.
When done install the ridge cap shingles over the ridge.