In this case a torn shingle above a seam your roof will leak if you have just one shingle missing.
How to fix missing shingles on a roof.
If you can t find a perfect match to repair shingles on your roof choose the most compatible shingles available.
Loosen and remove the damaged shingles.
If not you may need to go out and purchase a new bundle of shingles in a lumberyard or home improvement store costing up to 20 for a 100 ft square.
Take out the nails.
You will be able to use the same manufacturer approved roofing materials to make the necessary repairs to your home or business.
Seal down any surrounding shingles that may have had their sealant bond separated in the same way.
Carefully pry up the shingle until you find the nail.
Then spread the sealant with a putty knife.
Determine how many nails you have on your shingle piece.
Merely apply three small spots of asphalt plastic roof cement under the new shingle s tabs evenly spaced along the shingle length and press the shingle flat down into place.
Pry at it with a screwdriver until you can pry it out with a crowbar.
Don t bend the shingles back too far as you ll break them more.
If the shingles are severely damaged don t try to salvage them.
To replace a single shingle first use a chisel and hammer to split it into several narrow pieces then yank them out with pliers.
Just remove them and replace them with new shingles of a similar style to the rest of the shingles on the roof.
You may have a missing shingle that does not straddle a lower shingle seam.
Also remove any other nails that are exposed from the damage.
Because a missing shingle left unfixed could lead to a much bigger roof leak especially in heavy rain.
Loosen the adhesive underneath the tabs of the damaged shingle then pull them free and discard.
On the other hand.
Start by applying a thick bead of roofing sealant under the crack.
If you have shingles leftover from your last roof repair or installation you re in luck.