How Far Should Roof Shingles Overhang

Too little can allow water to seep into rake or fascia boards.

How far should roof shingles overhang.

Nail high up on the drip edge so that the shingles will cover the nails. The 3 4 overhang of the shingle creates a full 1 overhang from the fascia to the edge of the shingle. The drip edge also gives us a nice straight edge with which to align roof shingles slates or other roofing material. Is the amount of overhang the same at the rake as at the eave.

Drip edge varies in dimensions but typically the flange that nails to the roof surface is about 2 5 wide and the vertical edge that directs roof runoff down and away is about 1 5 in depth. Too much overhang and the shingles could blow off in high winds. 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. Knowing how much overhang roof shingles should have is only a small part of the job.

A architect and roofing consultant harrison mccampbell responds. Use roofing nails to secure the drip edge. Ed the roofer if what you say about fixing the problem cutting the edge is the proper way to do it than i m not terribly upset. How far beyond the drip edge should an asphalt shingle extend.

The edge of the shingles should hang over a roof between an inch and an inch and a half or between a half inch and three quarters of an inch if drip edge flashing is installed. Shingle manufacturers say to use a 1 4 to 3 8 inch shingle overhang over the eave where your roof ends. Knowledgeable roofers will install shingles at just the right overhang for your roof type. The drip edge flashing lip is 1 4 wide.

There is a lot to know a lot to do and a whole lot to be carried. We ve seen other references that suggest extending the shingles a bit more than the manufacturers suggest to compensate for wavy eaves but they do not indicate extending more than 1 inch over the eave. The end with the flange or flare should point down and away from the roof.