NewToAllOfThis Posted November 21, 2021 Share Posted November 21, 2021 I need to get the 110mm waste pipe through the beam and block floor that is on piles so there is around 500mm between bottom of block and ground level. Do I just drill a hole wide enough for the 110mm waste pipe and then seal the DPM around it, cut PIR around the pipe and then have the liquid screed poured so that it seals round the pipe or should I install a 125mm pipe and PIR and screed around that. I would then be able to insert the 110mm waste through the 125mm pipe and seal that so that if it ever needed replacing it will not need the screed, PIR and DPM to be repaired. Link to comment Share on other sites More sharing options...
PeterW Posted November 21, 2021 Share Posted November 21, 2021 I’d use a 125mm sleeve and pack it to allow a little bit of movement. 1 Link to comment Share on other sites More sharing options...
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