Classic rib steel roof panel in charcoal.
Steel roof panels over shingles.
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The first way is to run new underlayment over the existing shingle roof completely covering the old roof.
However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.
Project panel corrugated 3 ft.
Put the steel down directly on a vapor barrier.
Installing a steel roof will cost approximately 60 per square foot.
Galvanized steel roof panel.
There are really two ways to install a metal roof over a shingle roof.
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Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once.
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.
Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof.
This provides a couple of benefits.
If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems.
It doesn t matter if the air space is a half inch or six inches because the condensation factor will remain the same.
Use furring strips to build a slat board on the roof then mount the steel sheets to the slat board.
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The first one being that the new underlayment will act as a second line of defense in case water would to somehow get underneath the metal roof.
Be sure the larger edge is laid so that the small edge of the next panel will overlap it.
Our metal roofing profiles.
Installing steel roofing over existing roofing materials is fairly simple.
After all you ll be making a significant and long term investment.
Otherwise you will need to remove the shingles.
Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed.
Yes you can install a new metal roof over the top of an existing asphalt shingle roof provided there are not too many layers.
Install the roofing screws vertically along each rib in the panel.
Place the first screw.
So when we talk about metal roofing over shingles how does it work.
Remove the old roofing.
Metal roof over shingles condensation metal roofs must be laid flat on a vapor barrier because steel will condensate if there s any air space underneath it.
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Some consideration for vent stacks and chimneys is required during the design process.
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.