We're considering building an extension at the rear of the house but
there is a private sewer serving more than one property (including ours)
that runs along the whole width of the back garden, and about two metres
out from the back wall of the house. Therefore, we would need to build
over the private sewer (but fortunately not over the inspection chamber
which is in the adjacent driveway). Is this something commonly done for
situations like this? From what I understand any footings would need to
be dug lower than the depth of the sewer but is there also a minimum
horizontal distance that needs to be kept between sewer and the
footings? Anything else I should be taking into consideration?
Try the Hepworth site for info, contact them, they will give you
I have no connection with Hepworth, we merely used their products approx
16yrs ago for drainage in and around a new laboratory building.
I did something similar to this some years ago. The building
inspector at that time required brick piers either side of the
sewer pipe, to well below the level of the pipe, to support
the footings. The intent was that there would be no load from
the building, down through the footings, into the soil and
directly compressing the pipe. The load above the pipe was
being carried by the piers to the ground below the pipe level.
Best suggestion is to check with your local BCO.
Replace the obvious with co.uk in 2 places to mail me.
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