Use a caulking gun to apply a dab of roofing sealant about 4 per 10 oz.
Repear roof asphalt shingle.
Use a flat bar to pry up the damaged shingle and remove the nails being careful not to damage the shingle above it.
Just remove them and replace them with new shingles of a similar style to the rest of the shingles on the roof.
This is a serious problem and will require a roof replacement.
Over time asphalt shingles begin to curl upwards or downwards curling cupping clawing as a result of improper installation age or environmental conditions.
As asphalt shingles get older their corners often begin to curl downward or upward.
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.
Insert a putty knife under and above the damaged shingle to break the seal holding it down.
How to replace an asphalt roof shingle.
Tube under the corner.
Loosen and remove the damaged shingles.
About repairing a roof yourself.
Repair a torn or curled asphalt shingle.
Loosen the adhesive underneath the tabs of the damaged shingle then pull them free and discard.