Plyboard before tiling
Author
Discussion

Borris-Bear

Original Poster:

818 posts

267 months

Friday 23rd October 2009
quotequote all
I know i'm supposed to lay some WBP Plyboard over the floorboards before tiling my bathroom but what thickness board is recommended?

Dr_Gonzo

962 posts

247 months

Friday 23rd October 2009
quotequote all
I found a good guide for doing this here: http://www.ultimatehandyman.co.uk/tiling/tiling_wo...

xllifts

3,724 posts

225 months

Friday 23rd October 2009
quotequote all
Borris-Bear said:
I know i'm supposed to lay some WBP Plyboard over the floorboards before tiling my bathroom but what thickness board is recommended?
Before you lay down the ply ensure all existing floorboards are nailed screwed down so there are no kickers or wobblers, they lay your WBP 6mm down and screw it down every 300mm centres seems excessive but this will stop any movement.

d50cyx

292 posts

271 months

Friday 23rd October 2009
quotequote all
Overkill is the recipe for success here. Make sure the existing floor boards are completely solid. Then (at least) 12mm ply (I glued mine as well) screwed every 150mm. You really, really don't want this to move. My bathroom is on the first floor with a natural slate floor, and it hasn't yet given any indication of moving in 18 months.

bga

8,134 posts

273 months

Friday 23rd October 2009
quotequote all
About 5 years ago I put slate directly onto boards as I didn't want a 1.5" step into the bathroom. I was a bit nervous at first but screwed the boards down well, filled the gaps and used flexible grout and adhesive.
There hasn't been a single crack or flexing problem so far but that may be down to the boards being pretty thick to start with & screwed down very well.

fatboy b

9,661 posts

238 months

Friday 23rd October 2009
quotequote all
Hardibacker Board



Edited by fatboy b on Friday 23 October 12:41

V12Les

3,985 posts

218 months

Friday 23rd October 2009
quotequote all
Cant remember the name but there is an adhesive that will go directly onto floor boards. Prep the boards as previously suggested.

bga

8,134 posts

273 months

Saturday 24th October 2009
quotequote all
V12Les said:
Cant remember the name but there is an adhesive that will go directly onto floor boards. Prep the boards as previously suggested.
The adhesive I used was Bal Fastflex, I think it was a Bal flexible grout that I used too.

OldSkoolRS

7,068 posts

201 months

Saturday 24th October 2009
quotequote all
Probably overkill, but I completely replaced my floorboards with 18mm WBP before I tiled my bathroom floor with Travertine tiles. I screwed it down at much closer than 300mm centres and added extra 'noggings' between the joists as I was nervous about tiling on a wooden base (all my other tiling has been on concrete floors). It's been down about 18 months without so much as a hairline crack in the grout and I used a flexible adhesive and grout too. It took me a while to do, but I'd hate it even more if I ended up doing it again.





Edited by OldSkoolRS on Sunday 25th October 18:21

schmokin1

1,222 posts

234 months

Sunday 25th October 2009
quotequote all
that's looking nice but you might find a bit of water might run out of the sink and bogsilly

OldSkoolRS

7,068 posts

201 months

Sunday 25th October 2009
quotequote all
schmokin1 said:
that's looking nice but you might find a bit of water might run out of the sink and bogsilly
Took me a minute to realise what you meant. biggrin

squicky

277 posts

202 months

Sunday 25th October 2009
quotequote all
Out of curiosity, did you tile the wall before or after the floor (ie are the wall tiles sitting on the end of the floor tiles or the floor tiles sitting next to wall tiles).

(Just pondering for when I next do tiling smile )

OldSkoolRS

7,068 posts

201 months

Sunday 25th October 2009
quotequote all
squicky said:
Out of curiosity, did you tile the wall before or after the floor (ie are the wall tiles sitting on the end of the floor tiles or the floor tiles sitting next to wall tiles).

(Just pondering for when I next do tiling smile )
I think I tiled the walls first and used spacers to make sure there was a gap between the two edges, otherwise there is no room for grout and it will just drop out. I'm sure a professional might do it differently, but I had delays doing the underfloor work and it meant I could at least get some tiles up on the walls to help my morale. biggrin I also wanted the top row of tiles to be above the join in the plasterboard, so the small increase in tile height helped. I removed upto 1200mm height of the old plasterboard complete with the old tiles and simply replaced the plasterboard with new. Quicker and cheaper than paying for a plasterer.

I turned my picture the right way now incase anyone wonders about the water coming out of the sink comments above. wink

Edited by OldSkoolRS on Sunday 25th October 18:28

HowMuchLonger

3,023 posts

215 months

Sunday 25th October 2009
quotequote all
Did you tile underneath the sink/toilet or around them?

OldSkoolRS

7,068 posts

201 months

Sunday 25th October 2009
quotequote all
HowMuchLonger said:
Did you tile underneath the sink/toilet or around them?
I tiled underneath them...the original plan for the sink was a fully 'floating' one, but the larger sink we changed it for needed a pedestal to support it.