However scratches down to the metal can be problematic.
Steel roof over shingles or remove.
I would argue that putting sheet metal roofing over existing shingles if going to always look just at leat a little bit junky because the surface they are starting with is uneven and somewhat compressible.
Otherwise you will need to remove the shingles.
Some roofing contractors recommend reroofing with standing seam metal because the total roof weight is but a fraction of a standard asphalt shingle roof which helps preserve the roofing integrity.
In a typical year approximately 90 of the roofs our company manufactures are installed over old shingles.
The fasteners will likewise be doubled which can compromise roofing integrity.
Make sure roof is square.
However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.
Remove roof shingles before installing a metal roof.
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.
In my opinion going over the old shingles is worthy of consideration because of the benefits of doing so.
Use a flat pry bar or roofing shovel to pry out and remove the ridge shingles.
Overgrown trees debris and even snow can scuff up the surface.
Several of the contractor responses say why not leave perfectly good shingles under the metal roofing rather than remove them.
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.
Put the steel down directly on a vapor barrier.
You want to be sure that the roof and shingles are in suitable shape for the project.
A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.
Every roof needs to be evaluated individually.
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.
Doing it now will make it easier to keep the reroofing job clean.
However it is best to consult with a professional as to your situation.
At some point during its lifecycle you can expect the metal panels to get scuffed or scratched.
Of course metal panels are easily scratched.