How Much Overhang On Roof Shingles

This will protect a roof from most types of damage.

How much overhang on roof shingles.

The length of the overhang itself commonly ranges from 2 to 5 inches. In my opinion the shingles should never be exactly even with the edge of any drip edge flashing. Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports. Knowledgeable roofers will install shingles at just the right overhang for your roof type.

In my opinion the felt underlayment should also extend beyond the drip edge by 1 4 to 1 2 inch. The edge of the shingles should hang over the edge of the 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 and in most cases it should be. Two feet is the general maximum length for a typical roof overhang. If you have installed a drip edge flashing you should have between half an inch and three quarters of an inch of shingle overhang.

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. This profile of drip edge is shaped like a t with a lower flange at the bottom. A architect and roofing consultant harrison mccampbell responds. If you do not have a drip edge flashing installed shingles should overhang an inch to an inch and a half.

Each has their own reasoning for a slightly different amount of overhang.