Putting New Shingles On A Roof

Starting at the bottom of the roof map out a guideline with chalk.

Putting new shingles on a roof.

Manufacturers will still. Installing asphalt shingles over an existing shingle roof it s not ideal to install new shingles without removing the old ones but follow this pro advice if you do. Looks just as good and lasts as long. Now that we ve taken care of the primary question at hand we ll consider a couple of reasons why you might want to do this.

Use 4 nails per shingle and 6 nails on the prevailing windward sides of the roof as wind resistance nailing. Butt a full shingle up against the cut shingle and nail into place. Hammer the nail into the top part of each shingle. Although placing new roofing over old may be allowed by some codes roofovers tend to be inferior and won t last as long as a roof installed over stripped sheathing.

What you need power nailer or roofing hatchet tape measure roofing shovel or flat pry bar hammer drill carpenter s square straight cut tin snips utility knife chalkline broom. Installing a new roof over shingles takes less time than tearing off the old roof. Many pros shingle in a vertical line up the roof because it s much faster. Begin this layer at the bottom of the roof and add it in horizontal rows with a slight overlap to prevent.

Roll out a single layer of roofing felt or tar paper which serves as a moisture barrier. The shingles should jut out from 1 4 to 3 8 inch 7 to 1 cm over the drip edge. Known in the trade as vertical racking or staggering this how to lay shingles method enables the roofer to install a single column of shingles all the way to the peak without the wasted back and forth motion necessary to fill several rows of stair steps. Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.

The answer is yes you can lay new roof shingles over old ones. Should old shingles be removed before new installation. Then we ll look a lot more reasons why you might not want to do this. March 11 2020 by safe harbor roofing reroofing is the practice that involves installing a new roof over an existing one.

Has the same manufacturer s warranty. But before we get started one thing must be clear. Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles. Continue to chalk additional guidelines based on the width of the shingle through at least four courses rows across.