How Far Should Metal Roof Hangover Drip Edge

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

How far should metal roof hangover drip edge.

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. 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. Hi if the roofer used an extended drip edge flashing the shingles should be even with the outer edge of the perimeter of the dripedge. Too much overhang and the shingles could blow off in high winds.

Don t overdo the overhang shingles that extend more than 3 4 inch can eventually bend and fracture leaving the roof sheathing and fascia vulnerable to water damage. If you are not using drip edge make the over hang 3 4 then also on page 2 1st course paragraph reads make tabs lie flush with the edges of the starter course i find that by installing 1 instead of 3 4 it compensates for wavy fascia as you said but also if the roofers make a 1 4 mistake it s better to be a wee bit too much than a wee bit too little. Too little can allow water to seep into rake or fascia boards. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.

Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. Roof drip edges are generally sold in 10 5 foot lengths but they are occasionally sold in 8 foot lengths or smaller. However if they used an l type metal flashing or no flashing at all then the starter course and the shingles must be extended beyond the perimeter eve and rake edges 1 4 to 3 4 inch. Lengths of drip vary but typically it s sold in ten foot lengths 120.

Tape measure hammer pencil ladder small roofing nails tin snips before you start the installation remove all dirt and debris from the roof and take the measurements of the exterior edges to determine how much drip.