Both step shingling and racking will yield a watertight roof.
Lying down on roof.
Some roofers will use 15 pound 6 8 kg roofing paper which is an effective method although the best method is a self sealing membrane with a rain screen.
After completing a column the roofer can go back down to the eave edge of the roof and start laying the next column of shingles.
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Pre drill the holes and use 10 by 2 in 25 4 by 5 1 cm screws with polycarbonate washers.
Lay asphalt felt paper or special waterproof underlayment such as a self healing membrane over the roof.
Lying from the album.
Roof shingles are not lying flat.
When laying the shingles for the top row cut 6 inches 15 2 centimeters from the first shingle in the left corner of the roof using the utility knife.
Staple this felt down starting at the lowest point of your roof and working upward.
When the shingles heat up they become flexible and the adhesive bonds the shingles in place.
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All the other patterns work in essentially the same way offsetting.
You ll get the most life out of your shingles and your roof by laying them in a smart.
They give the roof a finished look while forming a protective seal.
Lay the next row of shingles directly on top of the first row making the row two tiles thick.
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Before new shingles seal down they can look a little lumpy and uneven but once the roof gets hot enough they should soften flatten and form a permanent seal.
Using alternate patterns 1.
You won t void your warranty by going with the racking method but with some manufacturers you d have trouble collecting a settlement on two specific problems.
Stagger each course to achieve the half pattern.
The shingles on your roof serve a dual purpose.
Understand the basic patterns.
Adjust the lap so that the last panel completes the coverage without making a cut lengthwise.
Consider four and five.
Continue laying down shingles until the row is complete.
Screw down the panels.
Continue across the roof until it is completely covered lapping over the previous panel by at least 2 5 inches 6 4 cm minimum.