Subscribe now and choose from over 30 free gifts worth up to £49 - Plus get £25 to spend in our shop
I've a second storey roof that drains via down pipe onto lower extension roof. Lower roof is low pitch, around 15*.
New high volume gutter fitted on lower extension, that is as high as I can get it and maintain draining. It sits @1cm below the level of the concrete profile tiles.
When it really rains the upper roof downpipe flow shoots down lower roof and just sails over the lower gutter edge.
It's only happening a few times a year in thunderstorm etc.
Thoughts - do I fit an 'upstand' to outer edge of lower gutter? Do I extend upper down pipe and fit right angle spout where it gets to lower gutter? Burn the house down and let insurance rebuild better?
Easiest option would be to either route the down pipe from the main roof into another half round, or have a connecting section of pipe between the outlet and the bottom guttering for guaranteed function. I would put a wire cover in the top outlet though as with such a long run you want to avoid leaf blockages etc
Why does it matter if water shoots over the gutter in heavy thunderstorms? I would have though it just goes on the ground, with all the rest of the rainwater, and you could just leave it to do that. Does it land on something delicate?
Burn the house down and let insurance rebuild better?
Is the only option but make sure you have boris johnson build back better - and greener - for you.
Does it land on something delicate?
The back of the house where this is has
A) a dodgy patio which drains towards the house.
B) no drain against the house wall, so water does pool
C) the dodgiest built wall, a connection betwixt 1980's narrow cavity blockwork and 1990's timber frame and blockwork
D) a level internally that means any water which does get in sits in puddles on concrete, 2cm below suspended floor
E) at the foot of a railway embankment, terminating in a 5' retaining wall, and 5' of the dodgy patio, so little sun and lots of drainage...
An overdue job is to lift the first line of patio slabs and put in a French drain underneath....
Basically, the house is damp there and I'm fighting every drop of water that goes that way.
I follow the problem. So ideally you want the water to go to the other side of the house? Is there scope to divert the downpipe higher up, or to add a new downpipe in different part of the gutter? I'm just thinking that whatever you do to get the water into extension gutter, it still has to get into the drains, and they will quite possibly surcharge and overflow in really heavy rains.
Where is the french drain going to direct the water? Round the side of the house?
Would it make sense to add drainage crates under the patio so that they can smooth the peak flows?