The more peaks valleys skylights and other obstacles the roof has the higher the installation cost will be.
New roof installation length.
Slope is calculated as rise over run.
When old shingles are torn off new roofing paper starter shingles ridge vent and moisture barrier are installed.
The national average cost to replace a roof is 7 211 with most homeowners spending between 4 707 and 10 460 roof installation cost ranges from 400 to 550 per square depending on the roof size and materials used in reroofing.
Install the drip edge on the gable ends of the roof after you finish installing your underlayment.
Use measuring tools to find the length and width of the roof from the ground outside.
Measure the vertical distance rise from the 12 inch mark on the level run to the underside of the same rafter.
Just hold the drip edge snug against the fascia and fasten it through the top into the decking with roofing nails.
Use the chalk line to snap a straight line vertically every 6 inches.
Repeat this on both sides of the roof.
Ranch homes for example are much easier to roof than tudor or victorian styles.
Nail it every couple of feet.
The whole length of the fascia is probably not perfectly straight so don t snap a line.
This translates to 6 725 to 9 000 for the very basic composition shingles roof installed based on the average installed cost of 450 per square with a typical 5 year workmanship warranty.
Every 5 inches make a new mark until you get to the rop of the roof.
Most ranch style homes in the us measure an average of 15 to 20 squares in terms of the actual roof surface.
Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.