Thin ply for floor

[marktiling]

Please can I have some assistance with a problem.
I have two bathroom floors to lay with tiles - its a relatively new build house and the floor level is quite high so by laying a 15mm ply floor plus everything it takes the floor way to high.
Is there an alternative ?
Not sure what to do ?

Thanks
mark

[united]

is there any deflection in the floor? I'm guessing that its floorboards at present?

[grumpygrouter]

If the floor is deflection free, then 6mm backerboard as the way to go, glued and screwed.

[paul flight]

the floor is prob chipboard . if it is see if it is green in colour??
check for movement in the boards and how much bounce there is . the chipboard should be replaced with 18mm wpb ply screwed at 200 centers. then sbr primed. A decoupling matting fixed with flexi adhesive . tiled useing a flexi adhesive then grouted with flexi grout. . you MUST make sure that as much bounce and movement is taken out before you start fixing. its all in the prep ok

[grumpygrouter]

the floor is prob chipboard . if it is see if it is green in colour??
check for movement in the boards and how much bounce there is . the chipboard should be replaced with 18mm wpb ply screwed at 200 centers. then sbr primed. A decoupling matting fixed with flexi adhesive . tiled useing a flexi adhesive then grouted with flexi grout. . you MUST make sure that as much bounce and movement is taken out before you start fixing. its all in the prep ok

Depends on the adhesive manufacturers spec.

[paul flight]

sorry ..... use ardex!!

[grumpygrouter]

sorry ..... use ardex!!

7001? Great stuff!

[timeless john]

I'd go with Grumpy's deflection free alternative - 6mm backerboards.

[marktiling]

Thanks for all the help. Great site
Mark

[marktiling]

Ardex is good stuff

[paul flight]

ardex 7001 is one fo the best addy out there . great grip . good bucket life and mixes up well . A1 adhesive . not chep but will not let you down!!

[Yorkshire Tiling Services]

6mm hardie backer board. Glued & screwed.
Bal single part fast flex adhesive !

[Dave]

You do need to make sure deflection is at a minimum before over boarding..

Hardibacker 250 ( 6mm ) would be my choice but like already mentioned you need to make sure is is good to tile on first.

[Yorkshire Tiling Services]

You do need to make sure deflection is at a minimum before over boarding..

Hardibacker 250 ( 6mm ) would be my choice but like already mentioned you need to make sure is is good to tile on first.

As above, neglected to mention

[easyt]

I would lift the floor first and have looksee. Has someone notched the top of a floor joist to run a heating pipe? If you want to fit a new light fitting beneath can you pull enough cable down to make the joint? Anything there that you might need to access. Worth a look I reckon.

[Phil Hobson]

I would go for the 6mm Hardie backer, Glued and screwed. If no deflection. my choice of adhesive would be Keraquick with latex plus