The bottom tile or slate of the roof covering should project at least half way into the gutter the ideal distance is between half way and two thirds of the way over.
How far should gutter extend past roof edge.
A typical metal roof overhang may be 2 to 4 inches or even less.
Here phil explains how much overhang a roof should have at the gutter.
Gutters should be hung where a straight edge laying on your roof shingles can easily extend over the front lip of the gutter this is the proper installment location for the high point of the gutter.
In many markets drip edges aren t code and roofers install shingles deep into the gutters.
Since the gutters have to slope down towards the downspout this distance will increase as you get closer to the downspout.
Companies like gaf have shingle installation guides usually stating that the shingles should extend no more than 1 2 to 3 4 inch beyond the drip edge.
Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.
Shingle installation can impact gutter performance.
If im not mistaken the drip extends from the roof about 3 4 of an inch to 1 inch.
With that style of drip edge i was always told 1 4 inch any more willhave toubles with the gutter.
The 3 would be the distance measured from the drip edge the point at which the water falls from the roof to the top of the gutter.
The back edge of the gutter should tuck up behind the dripedge if you have it otherwise the edge of the shingles should extend well over the back half of the gutter so the drips cannot get behind it and rot the fascia board.
In almost every instance gutter installers take the path of least resistance and shove the gutter right underneath the roof shingles instead.
Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.
The configuration of the brackets allows them to fit onto the gutter only one way.
A normal gutter will have about 1 2 3 4 of its width sticking out beyond the shingles to catch the runoff.
The reason for this is that whenever rain runs down any type of roof when it gets to the lower edge it clings to the tile or slate by capilliary action this means that the water actually runs around the bottom edge and slightlly back up the rear of the tile before gravity allows it to drop into the gutter.
Here phil explains how much overhang a roof should have at the gutter.
Tester101 jul 11 12 at 16 01 show 5 more comments.
Attach pvc gutter brackets onto the lower edge of the gutter at 3 foot intervals from end to end.
