How Much Overhang On Roof Shingles

The length of the overhang itself commonly ranges from 2 to 5 inches.

How much overhang on roof shingles.

Knowledgeable roofers will install shingles at just the right overhang for your roof type. 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. Each has their own reasoning for a slightly different amount of overhang.

This profile of drip edge is shaped like a t with a lower flange at the bottom. Anywhere from a 1 2 to a 1 overhang is acceptable as you can tell from the varying comments amongst the previous posters. If you do not have a drip edge flashing installed shingles should overhang an inch to an inch and a half. Two feet is the general maximum length for a typical roof overhang.

In my opinion the felt underlayment should also extend beyond the drip edge by 1 4 to 1 2 inch. 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.

A architect and roofing consultant harrison mccampbell responds.