Yes you can install a metal roof over shingles.
Is modified bitumen rubber used in shingle roofing.
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.
In the trade a rubber roof is known as an epdm ethylene propylene diene terpolymer although manufacturers have brand names for their individual products.
Modified bitumen roofs have a lot of advantages over other types of membrane roofing and are often seen as the modern alternative to the built up roof.
Note that roof systems typically include more than one type of material.
Whatever the reason these time sensitive requests require contractors who can quickly provide a roof proposal and get to work.
All in all there is a downside to this flat roof type where the torch down installation method happens to be dangerous.
However you ll want to check with your local building department before you make any decisions.
In fact when used to install the modified bitumen flat roof type it could easily cause a fire.
Rubber is not a new material for roof coverings.
Most rubber roof shingles are comprised of between 75 and 95 recycled materials including the re purposed tires.
From what i have seen it is most commonly used in conjunction with other roofing materials like asphalt shingles.
Modified bitumen is a type of asphalt product that can be applied in a number of ways to the roof in both hot and cold temperatures.
Often when a homeowner calls you for a roof repair or replacement time is of the essence.
Cons of the modified bitumen.
Epdm rubber metal tiles asphalt shingles modified bitumen asphalt bur pvc copper panels roofing slates and cedar shingles.