How Much Overhang For Roofing Shingles

A architect and roofing consultant harrison mccampbell responds.

How much overhang for roofing shingles.

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. Knowledgeable roofers will install shingles at just the right overhang for your roof type. Keeping a solid roofing layer of shingles is an important way to avoid water damage and. Each has their own reasoning for a slightly different amount of overhang.

After each shingle line has been laid one shingle will overhang the rake edge. Too little can allow water to seep into rake or fascia boards. The length of the overhang itself commonly ranges from 2 to 5 inches. Shingles protect sloping rooftops from the effects of rain snow and hail while providing an attractive crown for the house.

Too much overhang and the shingles could blow off in high winds. Asphalt shingles range in price from about 25 per bundle for a standard 3 tab style to around 50 75 or more for an upgraded architectural style. In my opinion the felt underlayment should also extend beyond the drip edge by 1 4 to 1 2 inch. How to lay shingles.

Here phil explains how much overhang a roof should have at the gutter. The average bundle of shingles covers 33 3 ft 2 so three bundles of shingles are needed per square. In my opinion the shingles should never be exactly even with the edge of any drip edge flashing. Since transportation is a major cost factor expect prices to vary by location.

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. Anywhere from a 1 2 to a 1 overhang is acceptable as you can tell from the varying comments amongst the previous posters.