How Much Overhang On Roof Shingles

Two feet is the general maximum length for a typical roof overhang.

How much overhang on roof shingles. 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. How much overhang should roof shingles have. In my opinion the shingles should never be exactly even with the edge of any drip edge flashing. Roof drip edges are generally sold in 10 5 foot lengths but they are occasionally sold in 8 foot lengths or smaller.

Each has their own reasoning for a slightly different amount of 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. If you do not have a drip edge flashing installed shingles should overhang an inch to an inch and a half. Knowledgeable roofers will install shingles at just the right overhang for your roof type.

This profile of drip edge is shaped like a t with a lower flange at the bottom. The length of the overhang itself commonly ranges from 2 to 5 inches. If you have installed a drip edge flashing you should have between half an inch and three quarters of an inch of shingle overhang. This will protect a roof from most types of damage.

A architect and roofing consultant harrison mccampbell responds.