Tiling floors.. 12mm ply help!!!

[leeroy]

Hi peeps

First post and its a question!! I want to tile my upstairs bathroom and i am un sure what to use on the floor as a base, At the moment i have t&g floorboards but have been told to use 12mm+ waterproof ply layed over the top??? is this right? i just thinking its going to be rasied quite high once tilied?


Thanks in advance!
Lee

[NETT Darren]

This is correct, screw it down every 300mm and squirt some no more nails down as well, use 25mm lenght screws called turbo gold from screwfix so it doesnt go through and hit any pipework. The heigh can be offset by a door trim from any tileshop or diy shop

[dts]

Hi Lee,

Depending on what type of tile you are laying, 9mm exterior ply would do the job just make sure the t&g boards are all securely fitted and you screw the ply down every 300mm aswell and use flexi adhesive and grout you dont want to be doing the job twice

good luck

[devonmark]

Hi Leeroy, welcome to the forums, if the height is an issue, you can always use hardi backer board or no more ply backer board, they come in 6mm thicknesses, the hardi is readily available at the likes of topps and no more ply is available at tile giant. It comes in 600 x 1200mm sheets. To fix use a polyurethane glue on the back and screw every 250-300mm, use plasterboard screws and countersink them..hope this is of use...Mark.

[Northern Bird]

And with the board you are only fixing at 400 or 600 centres.

But remember to put down a bed of adhesive first

[Captain Slow]

Hi Leeroy and welcome to the forums.

All the previous posts are correct. However, if the floor boards are deffo tongue & groove and they are securley fixed you can tile directly onto them.

Please see an exert from Ardex brochure, below....

Existing tongue and groove floor boards of
traditional construction should be screwed or
ring nailed down to the joists to provide a rigidly
fixed, flat and adequately braced surface.
Any existing floor polish, wax, old adhesive etc.,
should be removed, e.g. by sanding to expose
a clean surface prior to tiling.

The full brochure is, hopefully, attached.
ARDEX-FLEX%207001.pdf

[leeroy]

Thanks guys

I have gone down the 12mm ply route it is waterproof but do i need to seal it with something else?

[howard]

just prime it once its down

[Dave]

Check with the adhesive manufacture as to whether the ply needs priming..

Bal only recommend you prime the back and the edges, not the face of the ply.

It usually say's on the bag, if not there tech number will be on the bag and ring to check........