You don t need more than 1 4 inch drop towards the downspout for every 10 feet legnth of gutter.
How far past the roof should gutters extend.
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.
I have a lovely old bloke next door in his late 70 s who has 12 x 7 m carport that was installed pre google earth.
A normal gutter will have about 1 2 3 4 of its width sticking out beyond the shingles to catch the runoff.
Here phil explains how much overhang a roof should have at the gutter.
Gutters should extend beyond or past the edge of the roof line at least 1 in order to catch every drop the rain water coming down the edge of the roof instead of trickling down the side of your home s siding or wall.
How far should the roof extend over the gutter.
So essentially what you re doing is creating a bridge to make up the distance between where the shingle ended and where it really should have ended which is at the edge of the gutter.
This way any snow sliding off would clear the gutter and not damage it.
And you run the flashing up under the roof shingles and you make sure it extends past the roof shingles and lays into the top of the gutters.
The lengthwise end of the gutter should not be shorter than the roof.
I have an issue with this.
I had all new gutters installed.
On some homes a gutter can look like a rainbow high in the center and low on both ends of the house where the downspout outlet and downspouts are located.
My problem is that is it is on the fence line and it has no gutters.
Here phil explains how much overhang a roof should have at the gutter.
5 tips every homeowner should know.
In three areas the gutters are 5 to1 shorter lengthwise than the edge of the roof.
In four areas they are 1 to1 5 lengthwise beyond the edge of the roof.
My understanding is then a 1 16 per inch pitch is standard.
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.
I read that the start of a gutter needs to be low enough that if you took a level and laid it on the roof it should clear the front edge of the gutter.
More often than not the gutters are not positioned properly at the ends of the run of gutter.
On a new gutter installation.
Depending on the climate you live in the resulting weather patterns and the way your panels are installed the required amount of metal roof overhang will differ.