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.
How to put metal roofing on ceiling.
Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.
Most metal shingles will be attached to the roof using metal shingle.
Space the screws about 12 in 30 cm apart down the entire piece of metal.
In this video i cover measuring the roof figuring the metal th.
Use your neoprene washer head screws to secure the metal to the sheathing.
Take care the first piece is aligned precisely perpendicular square to the edge.
Take your first sheet of metal and place it on the roof so that it overhangs the edge at least 3 4 in 1 9 cm.
If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.
Drill the screws into the corrugated metal panels onto the beams every 12 inches.
Ideally the wood beams will be located every 2 feet or 6 feet apart for steel beams.
Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.
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.
This is part 1 of a 6 part video series explaining how i installed a metal roof on my house.