It is non corrosive and non staining so that your roof looks good but is structurally stable.
Should metal roof overhang drip edge.
Of course a drip edge should be flat on the roof deck.
If the overlap is too short fix it by placing drip edge under the first row of roof shingles and be sure that the exterior edge is reaching over the gutter.
Drip edge profile types.
It has the main function of controlling water flow on the roof which has many implications.
Reasons to use drip edge.
Although it does not look like much this component is made to have great structural integrity.
Directs water away from the fascia and prevents water from rotting the fascia over time.
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.
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.
While plastic vinyl and fiberglass drip edges may also be available in your area these materials are best suited for use in nonroofing applications such as above doors and windows.
Too much overhang and the shingles could blow off in high winds.
On 2020 02 20 by chuck.
When used as a drip edge it should be a minimum of 0 69 mm or 20 ounces.
A typical metal roof overhang may be 2 to 4 inches or even less.
If the gutter is lower than the bottom edge of the drip edge install flashing behind the drip edge and over the back edge of the gutter to remove the gap.
Drip edge overhangs the sides of the roof and has a small metal flange that is bent away from the fascia.
Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.
Drip edge is a metal flashing that tends to overhang the sides of a roof.
Slightly out of perfect flat probably isn t going to make a noticeable difference.