- Location
- Near Colchester
I have some 8 inch deep flow on one shed, only overflowed once in 15 years, 80 x 40.
Sadly it is the valley that then leaks into the grain store.
60×80 shed, downpipe positioning
- Thread starter Grass And Grain
- Start date
Sadly it is the valley that then leaks into the grain store.
Make sure you place the down pipe away from the column foundation to allow drain pipe installation away from a lump of concrete
- Location
- Yorks
Got the t-shirt on that one, and elbows are the first place to have a blockage.
- Location
- Yorks
Not concreting the floor (yet), so have decided to have one downpipe (either side) at front corner of the shed. Any problems and we can have a rethink without too much hassle.
ollie989898
Member
ollie989898
Member
Or better yet, a giant (and deep) fresh water pond. Put some fish in it. 
Steevo
Member
- Location
- Gloucestershire
28% more.
Ours is nowt fancy in the guttering dept, get some guttering 30% bigger and be covered easy….
- Location
- Yorks
Evening Stillman. So is yours just 6" half round plastic?
We've a 75' span shed, which is 45' long. The cattle yard closest to the house. Half round 6" plastic gutters. It's fine most of the time, but water does overtop the gutters in a thunderstorm.
Yes I think that’s what ours is. Will have a proper look an let u know. where our shed is located if gutters over top occasionally it wouldn’t matter anyway
RWG Contracts
Member
- Location
- Samlesbury, Lancashire
I think your biggest problem will be one for pipe trying to cope with all that water. Might have to put two next to each other
- Location
- Yorks
Existing 80×60 shed here, has one downpipe per side. Never been a problem, but they're positioned half way along the shed. 160mm downpipes, 200mm stormflow plastic gutters.
RWG Contracts
Member
- Location
- Samlesbury, Lancashire
why ask then?
in a heavy rain I’d just be concerned about down pipe keeping up but if you’ve one already then it’s no problem
- Location
- Yorks
Because the one we already have had the downpipe in middle of gutter run (so only 40' of gutter run either side of the downpipe).why ask then?
in a heavy rain I’d just be concerned about down pipe keeping up but if you’ve one already then it’s no problem
For new shed, ideally, I want a single downpipe at one end of the shed (for each side of the roof).
So it's not the downpipe capacity, but the ability of gutter to take 80' of water without overtopping before it reaches the downpipe. That's what I'm trying to determine
RWG Contracts
Member
- Location
- Samlesbury, Lancashire
Because the one we already have had the downpipe in middle of gutter run (so only 40' of gutter run either side of the downpipe).
For new shed, ideally, I want a single downpipe at one end of the shed (for each side of the roof).
So it's not the downpipe capacity, but the ability of gutter to take 80' of water without overtopping before it reaches the downpipe. That's what I'm trying to determine
I think you’ll be ok for normal use. It will overrun in freak thunderstorms
Steevo
Member
- Location
- Gloucestershire
I think part of the trouble in heavy downpours is that there is so much water coming off the roof that when it falls in the gutter is disturbs/slows the flow of any water travelling along the gutter so it loses momentum.
- Location
- Near Colchester
A slightly steeper gutter helps.
I have had a look around today and I spied one shed with an 80 x 35 side (half main span and a 20 foot lean to but at a shallower angle) with a 6 inch gutter and 4 inch down pipe at one end.
I don't recall that ever over topping but the shed is on a slope and so is the gutter.
I have had a look around today and I spied one shed with an 80 x 35 side (half main span and a 20 foot lean to but at a shallower angle) with a 6 inch gutter and 4 inch down pipe at one end.
I don't recall that ever over topping but the shed is on a slope and so is the gutter.
designanddetail
Member
Why not just use a deep flow folded metal gutter to increase capacity and be sure your covered?