Help! :-) levelling Kakade shower tray

[bazza999]

Hi all,

Needed some help..... there is a bit of sag in the centre joists (see pic). Gap is about 1cm at highest point. Whats the best solution? Is there a substanc whiadheres to wood and solidifies, providing a solid base?. I was thinking something along the lines of no-nails type adhesive or something which I can spread on the affected joists, lower the tray in to place, and let the tray bed itself, then screw the tray down. Or is it a case of getting 10mm piece of stick and sliding it under....

Any ideas? I have the no-more-ply adhesive that will be used to stick the tray down too, will that do the trick?

any help / ideas would be greatly appreciated

thanks in advance.

 

[lizzardtong]

shim that joist or you can screw 2/6 to existing foist to level the floor. make the floor flat and level. that will make your life much easier. or you can level noggings and add shim on the joist.
but wait for other opinions.

 

[Rossymcg]

I don't know this type if tray but the ones I use I ply under them between the joists then bed the tray on with SPF addy, no problems then at all, but remember your tray will be perfectly level and the surrounding floor will not, that will require additional work after you've fitted backer boards

 

[bazza999]

Thanks for advice guys. In the end I put a strip of wood down with screws, countersunk and then planed off until i got a fairly level floor. I thought of using shims, but was concerned that when I laid down the 22mm ply, it would be difficult to gauge where to put the shims, and getting screws into shimmed area.