How To Install New Roofing Shingles Over Exisyting Roof

Remove the cover and then nail the old shingles back down again.

How to install new roofing shingles over exisyting roof.

Use a starter strip or cut pieces for a starter course. Install new flashing metal flashing is often called drip edge along the bottom of the roof near your gutters. Install new shingles to the lower edge of the opening. Nail the drip edge in place using your hammer and roofing nails.

Rip cut the starter strip or starter pieces so that they butt up against the second course of existing shingles and are even with the front edge of the existing roofing. Attach with nails along the top edge of the strip. You need to tear off the roof and install a new one. But if the current roof is curling this isn t possible.

If you nick or tear the old flashing piece then go buy a new one. To install line the valley with underlayment secured with roofing cement. Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in. Apply roofing cement to the back.

Cut the existing shingles and pry up carefully. Cut the flashing into 6 to 8 foot lengths to help prevent buckling after installation. Leave the old valley flashing in place and install new over it. Current shingles are curling or in bad shape the new shingle roof should lay flat on your old one.