If the hole is less than an inch i would caulk the hole.
How to repair a small hole in a shingle roof.
A hole in a metal roof system can be caused by any number of sources the hole may be from deterioration and rust or it may be from something falling onto the roof surface such as a large branch.
If the shingles are severely damaged don t try to salvage them.
Nail tar paper on with roofing nails over every 18 inches of the perimeter and along any overlapping sheets.
Clean the repair area.
More than an inch i d nail on a flat metal sheeting.
The first step in the repair of any metal roofing material will involve cleaning the surface.
Next use a utility knife to trim a new shingle to match the width of the space.
Remove shingles and cut tar paper to visually inspect if hole penetrated roof sheeting.
Start by applying a thick bead of roofing sealant under the crack.
Fill small nail holes with silicone caulk or roof cement.
Press the shingle down and apply a second bead of sealant on top of the crack.
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 3 8.
Lay the upper sheet of tar paper 2 inches over the lower if two sheets are needed to cover the section.
If a shingle is simply cracked or torn you don t have to replace it just repair it.
Just remove them and replace them with new shingles of a similar style to the rest of the shingles on the roof.
Loosen and remove the damaged shingles.
Loosen the adhesive underneath the tabs of the damaged shingle then pull them free and discard.
Slip the top of the paper in under the flaps of the shingles above the repair.
Slip a hacksaw blade under the shingle above and cut through the nails that held the old shingle in place.
Lay roofing felt or tar paper over the missing shingles.