In a standing seam roof long single panels run vertically all the way from the eave to the ridge.
How to install metal roof for backyard patio.
That type of screw goes into into every valley at the top and bottom ends of the panels and every other valley throughout the rest of the roof into the 1 x 6 boards placed 24 on center.
How to install a patio roof using corrugated metal panels installing closure strips.
Most metal shingles will be attached to the roof using metal shingle.
To install the closure strips attach the strips to the top of the blocking with galvanized.
You have to do it thoroughly so that the rafters sit flush on it.
Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.
Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.
Make a cutting on one of the sides of the horizontal roof beam on an angle.
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.
Once all of the closure strips are in place begin installing the corrugated roofing panels.
If you are installing a metal roof on a structure like a patio cover you may not need this insulation layer.
The roofing felt will lay horizontally along the plywood deck of the roof.
As for the corrugated metal roofing i chose rubber washer metal into wood screws with bolt heads and used a magnetized drill adapted socket to put them in.