Freestanding bath.

[denso13]

Yes, who knows, but the old bath was in the same position.

Let's see what is found and go from there.

 

[darren6645]

Cant say I've seen many domestic floors done in OSB, maybe different down south tho

My apologies you are correct the floor is t&g chipboard not osb. I've been looking at osb and put that by mistake.

 

[darren6645]

I wouldn't think that the joists centres would be 800mm which is what they would be roughly, if the bath width is 750mm and the joist is sitting just outside the edge of it and they are running in line with the bath. So would think there would be another between the one @ the wall and the one on the outside edge.

If there isn't then I'd look to add braces between them to avoid deflection.

There's a joist running parallel to the back wall and then at approx 420mm there's another parallel joist then at approx 220mm from that there's another then they go back to 400mm centres across the rest of the bathroom.

 

[denso13]

Crack on with it.

 

[Madrab]

+1 - fire away