Install a 2 by 4 brace under a small hole that extends three times the width of the opening.
How to repair small hole in roof.
Repairing nail holes in a metal roof is an inexpensive alternative to replacing portions of the roof.
If your ceiling has a plastic vapor barrier between the drywall and the attic insulation push the insulation aside and look for flow stains on the plastic often water runs to openings in the vapor barrier such as at ceiling light fixtures.
Assessing a roof leak.
Sometimes the water shows up at a ceiling spot distant from the leak.
As to how the repair is made for the big repair i think the replace the odb sheet.
Use the back end rounded end of a small ball peen hammer to bang any edges into the hole so they don t interfere with applying the fibreglass mixture later.
Some overhead leaks are due to minor problems such as a single torn shingle or a small hole in flashing that you can usually handle with a little diy experience and some.
Part of the problem is making the repair match.
Smaller nail holes will be permanently fixed by this method standard roofing nails would be either 3 8 inch or 1 2 inch making a hole.
Where are you going to get the new ones.
There may be jagged edges left over from grinding or snipping away at the metal.
You have to replace a few shingles.
Apply urethane caulk using the caulk gun to the back of the.
Fill small nail holes with silicone caulk or roof cement.
Hold it against the inside of the plywood by pulling up through the hole while driving deck screws through the roof and into the brace.
Use a ball peen hammer to tap the edges of the hole inward.
For a small repair i would guess that after a bit of clean up a patch is fastened from below and a filler is used to make things level.
Some roof leaks are tough to locate.