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Posted: Mon Sep 08, 2003 8:44 pm
by john345
I'm having a conservatory built at the moment, nearing completion. It's about 11x12ft in size and looks like there's going to be one downpipe handling the roof water. The firm has inserted a small surface concrete gully right up against the main house wall, and channelled it into the outside kitchen drain. I, as a layperson, am worried about whether this will be sufficient to handle the water during a heavy downpour, and also, whether it is good practice to have this running alongside the outer wall. The gully does not look very deep, and I can easily imagine overspill. Any advice would be most welcome!
Posted: Tue Sep 09, 2003 12:19 pm
by 84-1093879891
Can you clarify the layout for me?
You say there's a small gully placed against the wall of the house...
1 - what do you mean by a "surface concrete gully"?
2 - is the downspout discharging into this directly?
3 - what do you mean by 'channelled'? Is this a piped connection or an open surface channel?
Overall, the extra load imposed on the existing drainage system by a 10m² conservatory is not going to compromise the system - you'd be amazed at the actual 'carrying capacity' of even a 100mm diameter drain, and a small residential conservatory makes very little difference to the total volume of water carried by the drains.