Use a flat bar to pry up the damaged shingle and remove the nails being careful not to damage the shingle above it.
Repear roof asphalt shingle.
Repairing or replacing the most common type of roofing asphalt or asphalt fiberglass shingles sometimes called composition roofing is relatively easy but be sure you can work safely and comfortably on it before you decide to make your own repairs.
Tube under the corner.
Loosen and remove the damaged shingles.
Replace a badly damaged asphalt shingle.
Insert a putty knife under and above the damaged shingle to break the seal holding it down.
If the shingles are severely damaged don t try to salvage them.
Just remove them and replace them with new shingles of a similar style to the rest of the shingles on the roof.
If you notice a shingle starting to curl you can forestall the inevitable curling by gluing down the curled section.
This is a serious problem and will require a roof replacement.
Loosen the adhesive underneath the tabs of the damaged shingle then pull them free and discard.
About repairing a roof yourself.
Over time asphalt shingles begin to curl upwards or downwards curling cupping clawing as a result of improper installation age or environmental conditions.
Repair a torn or curled asphalt shingle.