Simply put this is faulty installation where the shingles extend too far over the edge of the roof or are too close to the edge.
How to shingle under a close roof overhang.
Too little can allow water to seep into rake or fascia boards.
Too little overhang and the water can leak through into fascia boards.
Too much and the shingles can blow off.
How far beyond the drip edge should an asphalt shingle extend.
In this installment of our series on roofing problems we ll talk about incorrect overhang of shingles.
Is the amount of overhang the same at the rake as at the eave.
Shingle manufacturers say to use a 1 4 to 3 8 inch shingle overhang over the eave where your roof ends.
A architect and roofing consultant harrison mccampbell responds.
99 of the time i see it cut close to flush with the metal drip edge but this latest one overhangs by nearly 1 does anyone see a problem with this both the eaves and rake were like this looks good jeff and it also helps prevent capillary action water will drip off the shingle instead of running off the fascia.
Or whatever your local borg calls roofing tar in a caulk tube the alternative to only sticking them on is of course to stick the shingle up in then facenail it as high up as you can reach under the overhang then wetstick the nail heads.
Finishing shingles installation under a tight overhang we just use wetstick.
Most shingle manufacturers along with the asphalt roofing manufacturers association s residential asphalt roofing manual call for a 1 4 inch to 3 4 inch overhang at both rakes and eaves.