On average a new roof can range anywhere from 6 000 to 17 000.
New gingles on roof.
That s also why building codes commonly limit re roofing to no more than two layers.
Hammer the nail into the top part of each shingle.
To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below.
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Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in.
Use the chalk line to snap a straight line vertically every 6 inches.
Installing new roof shingles over old effectively doubles the weight of the roofing so you have to make sure your roof structure can handle the extra load.
The shingles should jut out from 1 4 to 3 8 inch 7 to 1 cm over the drip edge.
Nail a horizontal row of shingles over the drip edge.
Meanwhile the most popular roofing material asphalt shingles may cost 4 000 to 6 200 for a full installation.
Every 5 inches make a new mark until you get to the rop of the roof.
Leave the old valley flashing in place and install new over it.
Repeat this on both sides of the roof.