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PostPosted: Thu Sep 28, 2017 11:17 am 
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I have water drains (a collection from houses up the road) running down my back garden. With the incline and where the walls will be built (dwarf wall for 3m x 3m) the pipe should be about 800mm to 900mm deep.

Question does any action need to be made to protect the pipe. Chap says that he will go down to 450mm to 750mm depending on conditions.

We assume that the pipe after a run of 3m will be 900mm deep, see photo.


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PostPosted: Sun Oct 15, 2017 2:48 pm 
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OMG, 254 views and not a single comment!

Perhaps too difficult a post to answer!


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PostPosted: Sun Oct 15, 2017 3:46 pm 
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I'm not one of the 254 views, you can't build over the drainage, any footings need to be well below invert levels.


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PostPosted: Sun Oct 15, 2017 5:17 pm 
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cotswold builders wrote:
I'm not one of the 254 views, you can't build over the drainage, any footings need to be well below invert levels.


So are you saying we can't have a conservatory in our back garden?


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PostPosted: Sun Oct 15, 2017 6:01 pm 
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No, you can have a conservatory but you cant lay concrete foundations over the drains.
As I said, footings to be below invert levels, if pipe runs along trench you need to decrease the size, if you increase the size then you need a build over agreement from the water board.
If pipe passes through footing, then it need bridging over.
Whichever you need to inform water board.

Have you had a look at build base, easy foundation systems for conservatories.



For this message the author cotswold builders has received gratitude : graham101
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