If you are thinking of replacing a leaking metal roof with a rubber one an alternate solution might be to cover it with a layer of insulating foam and re roof it with another new metal roof.
Rubber roof over metal.
Installing 4 iso insulation with firestone epdm rubber membrane over old metal roof.
Bend the flashing into a v shape to fit over the top roof ridge and the corners where the panels meet.
Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it.
Alternatives to rubber roofs.
If you do a fully adhered tpo system your still using glue rollers and brushes just like on the epdm.
Then pieces of the membrane are cut and carefully glued around the vents creating a watertight seam.
It helps direct water away from the meeting points and keeps the roofing dry.
Sometimes the most economical way to reseal a metal roof is to apply a special soybean based coating with fiberglass webbing as needed.
Metal roofing varies greatly in price however and depending on your situation might be even more expensive than a rubber roof.
The flashing should overlap the edge of the roof by one inch to help direct water.
The only tools that separate the tpo roof from a rubber roof is in fact the welders and generators.
Advantages of metal roofs over shingles.
Hammers to pound roof nails into edge metal.
Doing a roof over adds an extra layer of protection above the original.
Mobile home roof over with single ply tpo white single ply tpo membranes are a very popular choice for mobile homes with flat or low slope roofs.
Still need screw guns for installing fasteners.
Once the rubber membrane sometimes called epdm is stretched over the roof and holes cut for the vents the rubber is next folded over the roof edge and fastened with screws.
Mobile home roof overs for flat roofs typically involve metal or rubber or pto.
Asphalt roofs are even more prone to this than other types like pto metal or rubber roofs.
They also need to be repaired by a trained professional.
By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them from being thrown into landfills.