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Hi gregers and, once more, Tony No time to reply until now but much appreciated. No doubt the joist's deflected to some extent over time but... nothing's dropping off underneath, all seems sound enough and acceptably flat; to my mind the grief of deeper intervention well outweighs the...

Big thanks to everyone who made suggestions - very helpful, much appreciated. Existing plumbing gone to allow equal bracing each side of the joist. All floorboards already spanning the joist and its neighbours will be left well alone. Ply and steel sourced, cut, ready to drill. Next...

Good point on the chequer plate, local engineer suggested it as he has plenty of offcuts, although he currently holds no flat 3mm & would have to buy in a large qty of it for my relatively small job, no point. But maybe I can source some myself. Compared with the fabrications he knocks out, my...

Thanks mfarrow To my eyes the joist is not noticeably lower than the neighbouring ones, I think in this case it's more that over time the plaster has given along the line of the joist as the load has fluctuated (+/- one person & bathwater) It's difficult to judge as plaster and lath seems to...

Hi Lower, thanks for your suggestions which zero in on what I think I'm going to do. Good call on bulking out the notch prior to resin, I'll have to see whether that stuff can be bought in smaller quantities. Not calculated the exact volume but it's not far short of a litre which is the...

Thanks also to Porque 223 and rjm2k I see the different ideas all circling the same problem... @ Porque - I see what you're saying, your scheme would require both intervention through the ceiling and also applying an upward force to counter-deflect the joist before packing and reinforcing...

Sorry didn't reply earlier, was out scrounging a bath :) @ Tony - many thanks for taking the trouble to sketch that idea, simple=elegant compared with my own side reinforcement. The notch is indeed under the bath; I've 300mm to the right to play with remaining in the bath's 'footprint', to...

Hi Tony1851, thanks for the suggestion, a lot more straightforward than what I've been contemplating. Yes, I thought the floorboards would be playing their part. I thought about a means of spreading the load of the bath feet off the problem joist but the next joist back lies directly...

Hi Freddy's twin The difficult [rear] face is free to one side of the notch, but on the other side I can only go about 160mm clear before I run into plumbing and extra timberwork which was added to support the pipework, so unfortunately a reinforcing plate wouldn't do a lot of good that side...

Cheers Pred and Freddy I've only got access one side, so presumably I could use a more substantial length on just the one face. Sistering I believe the term is. I'd be happy to record the event for posterity (posterior, maybe) but a 14st bloke riding a steel Kaldewei in his birthday suit -...

Greetings all, I first started reading this forum a couple of years back - around the same time I bought an old house as it happens. Strange coincidence that. Apologies for a lengthy first post but I've tried to provide all relevant info. I've been debating what to do about this charming...