How Far Should Roof Shingles Overhang

Set the first shingle of the second row back a half tab 6 inches 17 centimeters from the edge of first shingle on the first row and so that the bottom of its tabs just touches the tops of the cutout slots on the shingle below.

How far should roof shingles overhang.

The drip edge also gives us a nice straight edge with which to align roof shingles slates or other roofing material. 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. Lay the second row of shingles. You may find other styles and sizes of drip edges in the store including j channel drip edges but these are intended for windows doors and other applications.

The length of the overhang itself commonly ranges from 2 to 5 inches. 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. In my opinion the shingles should never be exactly even with the edge of any drip edge flashing. Handyman ian eltringham recommends leaving a 1 2 inch overlap between the edge of the roof and 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. A architect and roofing consultant harrison mccampbell responds. When you cut along the chalk line you should be making the shingles even and leaving a 1 2 inch overhang where the shingles extend beyond the edge of the roof. Draw a blue chalk line at this line.

Shingle manufacturers say to use a 1 4 to 3 8 inch shingle overhang over the eave where your roof ends. 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. Too much overhang and the shingles could blow off in high winds.

Rather than cutting the shingle at the roof s edge. Too little can allow water to seep into rake or fascia boards. In my opinion the felt underlayment should also extend beyond the drip edge by 1 4 to 1 2 inch. 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.