Noisy pipes

[Madrab]

1) His pipework isn't perfect by any stretch of the imagination - you will need a qualified plumber to report on that
2) You don't drop waste pipes into notched joists, you just don't, they are far too big - again that should form part of the plumbers report
3) When the joists are like regardless of whether he did it on not, you don't put a shower or anything else of weight on it and expect it to support - you will need a joiner to report on that, he will be able to comment on whether the cuts are new or not.
4) Structurally you'll need a engineer to report on what needs to happen re the joists.

Also re @Bodd comments there certainly looks like the 2 joists on the left (where the grey waste pipe comes to) may have already have old cuts on the end you can see, but not sure about the reverse end but all the joists to the right seem to have new cuts. Need a proper close up (on site) view of it all.

You really need to get the floor up and get things properly inspected, once that's done you will be in a better position to know how to take things forward.

 

[Bodd]

Could the first image be darker because it was burnt with a blow torch? So could also be recent cut.

Maybe: but I think you can tell he has cut at least some

 

[HERTS P&D]

I would remove the ceiling underneath, get an engineers report, put up props that way you can still use the bathroom and take it from there. The easiest way to repair this would be joists or a steel under the floor with a new false ceiling.

Andy

 

[Bodd]

1) His pipework isn't perfect by any stretch of the imagination - you will need a qualified plumber to report on that
2) You don't drop waste pipes into notched joists, you just don't, they are far too big - again that should form part of the plumbers report
3) When the joists are like regardless of whether he did it on not, you don't put a shower or anything else of weight on it and expect it to support - you will need a joiner to report on that, he will be able to comment on whether the cuts are new or not.
4) Structurally you'll need a engineer to report on what needs to happen re the joists.

Also re @Bodd comments there certainly looks like the 2 joists on the left (where the grey waste pipe comes to) may have already have old cuts on the end you can see, but not sure about the reverse end but all the joists to the right seem to have new cuts. Need a proper close up (on site) view of it all.

You really need to get the floor up and get things properly inspected, once that's done you will be in a better position to know how to take things forward.

Would her home insurance help her in anyway do you think?

 

[HERTS P&D]

She can only move forward once she has an engineers report. Then claim off the 'bathroom fitter', by going to a solicitor and asking for his pubic liability insurance.

Andy

 

[dilalio]

I still say the easiest solution is to create a new floor from underneath.

 

[HERTS P&D]

Watch how quickly he responds to a solicitors letter asking for his pubic liability and saying they are claiming off him due to his faulty workmanship.

Andy

 

[Madrab]

Would her home insurance help her in anyway do you think?

No reason not to do some investigations into what an insurance company would say, maybe online in an insurance forum or similar. My concern over contacting their own insurance would be, given the potential severity and ramifications of what could happen if those joist went, whether they would invalidate the policy due to the damage having been created by work that's just been done rather than it being accidental.

It needs uncovered and properly inspected first IMO