Discuss Notching joists for 1” 1/2 waste bath/shower in the UK Plumbing Forum | Plumbing Advice area at PlumbersForums.net
Hi Ben, see diagram, the wiggly lines are planned 1 1/2 pvc to bath and shower and green highlights are notches needed, as only going through joists close to bath and shower these will be shallow 44mm and no need to go through moreWhat are you trying to do?
Bearing in mind the notch size needs to increase as you go, to get a fall on the pipe, if your joists aren’t big enough to allow this you will have to route the pipe another way.
Not what you want to hear but that’s how it is.
Or is it just one joist? In which case I would do it and ‘plate around the notch with 18mm ply.
Looking at the plan now, is it not possible to get a bath with waste at the end, similarly the shower tray, and leave the joists alone? (I guess it's too late)Hi Ben, see diagram, the wiggly lines are planned 1 1/2 pvc to bath and shower and green highlights are notches needed, as only going through joists close to bath and shower these will be shallow 44mm and no need to go through more
Its freestanding egg unfortunatley so all waste is under floor. Current fall based on that plan for bath is 1 in 50Can’t the bath waste be above the floor under the bath - come to the right and then go under? (Or is it a a freestanding “egg” bath)
Bath is on its way today! as its a egg bath most come with centre waste as is the case with oursLooking at the plan now, is it not possible to get a bath with waste at the end, similarly the shower tray, and leave the joists alone? (I guess it's too late)
Cheers,
Roy(Amateur)
The length between those notches would be circa 2 m.You are cutting the same joist twice so not good really.
Can tray go on legs/plinth ?
If the wall “North” of the bath is external you could take the waste out to here come across and re-enter the building between the joists on the right. Use tees with rodding eyes.
I have done this 5 or 6 times with no issues (usually with a shower) . Then no joists need to be cut.
Thanks Ben, I might have to go with that!That’s a lot of weight.
If you wish to proceed, put in two extra rows of noggins to help transfer the weight and plate up the notch both sides with 18mm ply glued and screwed - extend this to the wall and back past the bath so about 1 metre long.
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