Swap Shingles

If part of a shingle is missing, you'll have to replace the whole thing. First see if you have any leftover shingles from the last time the roof was worked on (with any luck, the builder or the roofer who handled the job left some behind). If not, you'll have to buy a bundle at a home center or lumberyard ($15 to $20 per square—100 sq. ft.—of standard three-tab shingles). If you can't find a perfect match, choose the closest one.

Replacing a damaged shingle requires a hammer, a flat pry bar, a utility knife and a handful of 11/4-in. roofing nails. Each shingle is initially secured with four nails; when the next shingle course above is installed, however, its nails also pass through the top edge of the shingles in the course below.

Begin removing the first row of nails by sliding the pry bar under the shingle immediately above the damaged one and gently lifting it to free it from the sealer strip. You'll see the first row of nails beneath.

Slip the pry bar under the damaged shingle and pry upward. Once the nail pops up about 1/4 in., remove the pry bar, press the shingle down and pull out the nail. Repeat this procedure for the remaining three nails. Then push the pry bar under the shingle directly above the damaged one and remove the second row of nails the same way. After yanking all eight nails, pull out the damaged shingle.

If the existing shingles are brittle, you may not be able to pry out the second row of nails without cracking a shingle. In that case, tear out the damaged shingle and cut V-notches in the replacement to fit around the four nails. Slide the new shingle up into place and secure it with four nails.

Ask TOH users about Roofing

Contribute to This Story Below