SuDS

[Arceye]

Is there a place I can go to work out the flow of roof water that would be allowed to drain into a ditch?
It all looks overly complicated with many different water types and hazardous wastes, I just want simple rainwater on a roof.
Looks like a red tape nightmare designed to keep "professionals" in a cosy lifestyle.
Ian

 

[Pan mixer]

Is there a place I can go to work out the flow of roof water that would be allowed to drain into a ditch?
It all looks overly complicated with many different water types and hazardous wastes, I just want simple rainwater on a roof.
Looks like a red tape nightmare designed to keep "professionals" in a cosy lifestyle.
Ian

Down this way it is easier to say that the roof water will be captured in a tank- quite handy stuff too I have found.

 

[HatsOff]

Building Regulation Part H is what you need.

Page 40 has a way of calculating how much rainwater you will need to deal with.

What is allowed is what would have drained off a 'green field' that was there before the roof (ignoring brown field sites / previous development). But... if you're not draining directly to a watercourse I'd be tempted to describe the ditch as a 'swale' and leave it there.

 

[Still Farming]

More money for consultants!!!

 

[HatsOff]

Well... SUD systems does reduce flooding locally. But the clue is in the name as it's sustainable URBAN drainage. The tiny percentage of roofs and hard standing compared to fields in rural areas does make it a bit meaningless.

 

[teslacoils]

Well... SUD systems does reduce flooding locally. But the clue is in the name as it's sustainable URBAN drainage. The tiny percentage of roofs and hard standing compared to fields in rural areas does make it a bit meaningless.

Reduces flooding until noone bothers to maintain the fancy attenuation ponds.

 

[HatsOff]

All infrastructure becomes useless without maintenance.

 

[teslacoils]

Yes. Let's see how that works out for these new estates in fifteen years time. Local 70s estate is known for the sewers not exactly being reliable. These attenuation ponds and their associated culverts will be a nightmare down the line.

 

[Arceye]

Thanks very much for that link.

 

[br jones]

Is there a place I can go to work out the flow of roof water that would be allowed to drain into a ditch?
It all looks overly complicated with many different water types and hazardous wastes, I just want simple rainwater on a roof.
Looks like a red tape nightmare designed to keep "professionals" in a cosy lifestyle.
Ian

easy roof area x rainfall ,if its going into a ditch no probs

 

[br jones]

all new planning applications in wales over 100sqm require a suds drainage plan ,its not hard ,plus you must look after your water and not flood your neighbours ,or those below you ,its a good thing imo