How Much Overhang For Roof Shingles

Too much overhang and the shingles could blow off in high winds.

How much overhang for roof shingles.

If you do not have a drip edge flashing installed shingles should overhang an inch to an inch and a half. 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. Mark 12 inches up on the roof for the first course of shingles then mark every 5 inches all the way up the roof to set your reveal. If you have installed a drip edge flashing you should have between half an inch and three quarters of an inch of shingle overhang.

How much overhang should roof shingles have. The 3 4 overhang of the shingle creates a full 1 overhang from the fascia to the edge of the shingle. 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. 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.

In my opinion the felt underlayment should also extend beyond the drip edge by 1 4 to 1 2 inch. I was worried that because the edge shingle is the bottom layer fixing this would require redoing it. To lay out the design for the shingles begin at the bottom of the roof and place a tape measure inch from the edge of the roof to ensure the shingles overhang the drip edge. The length of the overhang itself commonly ranges from 2 to 5 inches.

Do this on both sides of the roof. Roof drip edges are generally sold in 10 5 foot lengths but they are occasionally sold in 8 foot lengths or smaller. This profile of drip edge is shaped like a t with a lower flange at the bottom. Too little can allow water to seep into rake or fascia boards.