Why one downpipe per 8 metres?

It’s a rough spacing guide. Local rules and rainfall can ask for closer spacing.

Are corners and stop ends included?

No. Count corners, outlets, and stop ends from the plan.

The total run of gutter, in metres, including each side of the building you are guttering.

Gutter length and a rough downpipe count — a spacing guide, not a drainage design.

Gutter length and a rough downpipe count. One downpipe every 8 metres is a starting point — rainfall and local rules can ask for closer spacing.

Gutter length

Total run, including each side you are guttering.

Gutter

22 m

22 m of gutter, with a rough 3 downpipes at one every 8 m.

Gutter22 m

Measurements stay in this browser. Nothing is uploaded.

22 metres of gutter, with a downpipe every 8 metres, needs 3 downpipes. The gutter length is the length you type.

Why one downpipe per 8 metres?: It’s a rough spacing guide. Local rules and rainfall can ask for closer spacing.
Are corners and stop ends included?: No. Count corners, outlets, and stop ends from the plan.
What length should I enter?: The total run of gutter, in metres, including each side of the building you are guttering.