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Thanks for your ideas on this. Do you think the architect should design the drainage run? Is that normally what happens? The building drawings are fairly loose on the drainage details. The levels were provided by a builder I had round to give a quote for doing the general blockwork. It was a...

Thanks for the ideas Woody and FMT. To answer your question about why the previous drawing had a drain run and 90deg angle, this was just how the architect drew it. The building drawing details are simply marked with a disclaimer that the drainage must be run in compliance with Part H of the...

I am at the ground work stage of a new extension and have a few concerns about the shallow drainage runs I have to work with and the effect this will have on the concrete slab construction. The floor will be 150mm hardcore, 150mm concrete, 85mm insulation and 65mm screed. How do I accommodate...

Thanks for your reply Noseall. I have put together a quick diagram of the existing drainage in green and what the architect has drawn up in blue. I was originally not in favour of this as there is an inspection chamber in the middle of the garage floor for connection to one SVP...

Hi, We're getting started on an extension and have run into potential trouble with the drainage design. The existing drainage seems to be very shallow - the inspection chamber that links to the sewer is just 600mm below finished floor level. This would not appear to be enough for the new...

I am considering putting in a wet room shower in an upstairs bathroom. Good or bad idea? Anyone recommend a good supplier for the parts? Seems like I need a tray former and suitable tanking system. Prices look high on some websites. Is this because wetrooms are not common in the UK...

First time here and some pretty comprehensive advice to be had. I am reinstating a toilet and basin in a victorian era house - the bathroom was originally downstairs and moved to the first floor leaving this room as a utility room. The old ceramic waste pipe is still present in the concrete...