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Correct nailing roof shingles

Improper shingle nailing

Correct nailing roof shingles

Improper shingle nailing

7. Use of improper nails

The standard roofing nail has a barbed body and nominal shank diameter of 2.7 mm with a head from 9 mm in diameter. Roofing nails must be corrosion resistant and galvanized. Properly driven and applied roofing nails are the only preferred fixing system for asphalt shingles!

Solution:

If shingles are applied with staples, refix every shingle with proper roofing nails and, if necessary, apply some Shingle Stick. If you experience leakages through the corroded nails, try to fix these leaks with Shingle Stick. If this doesn‘t help, you have to consider a new roof.

8. Not aligning shingles correctly

Shingle alignment - both vertical and horizontal - is required. The best way to ensure that the shingles are horizontally aligned in new applications is by the use of a chalk line. Especially for tab shingles, the use of chalk line is highly recommended. The bottom edge of laminated shingles must align with the tops of the saw teeth of the shingles in the underlying course. Too high alignments increase the chance of wind blow off and wind driven rain backing up under the shingles.

Solution:

When the roof doesn’t leak this is only an aesthetical problem.

Incorrect overlapping of Cambridge Xpress