my wetroom

[Ajax123]

ok...so I have at last made a start and am currently planning the frame and base for the new wet room. I could do with a little advice though. All of the info I have read say plywood for the base. I have loads of 22mm OSB in my shed so was thinking I might be able to use this.

No worries if not I will have to buy some ply as not going to spoil it for the sake of £20 for a sheet of ply.

Your thoughts appreciated. Definitely Ply or will OSB do the job

 

[Qwerty]

No no to OSB I'm afraid Alan. If exposed to moisture it will swell and cause mega issues. In the USA it is acceptable practice and I have been guilty in the distant past of fixing to it but as you say, it doesn't cost a huge amount and best done right from the start.

 

[Ajax123]

ok. No worries. sheet of marine ply to be ordered then... I agree needs to be done right from the start. Certainly don't want to have to do it a second time...especially for the sake of £20. have to use the OSB on something else. Maybe Ill board out the loft

 

[Chalker]

£20 for marine ply! Can I have some too?

 

[Ajax123]

£20 for marine ply! Can I have some too?

Ive estimated the price but I reckon itll be about £22 plus the VAT 8x4 sheets of 18mm marine ply from my supplier.

 

[Ajax123]

I do know for some reason the 22mm jumps hugely in price... I think that was about £45 a sheet... I think its cos 22mm is classed as structural ply

 

[J Sid]

and thats marine ply or wpb grade?

 

[J Sid]

dam good price if it is

 

[One Day]

I get good quality far eastern Marine ply for 28 a sheet at local timber merchant. And they cut it for free too!

 

[Bill]

Is far eastern marine plywood from Hull?

 

[Bill]

I get good quality far eastern Marine ply for 28 a sheet at local timber merchant. And they cut it for free too!

8x4 Far Eastern Marine Plywood Sheets 18mm x 1220mm x 2440mm | eBay - http://www.ebay.co.uk/itm/8x4-Far-Eastern-Marine-Plywood-Sheets-18mm-x-1220mm-x-2440mm-/272422381309?_trksid=p2141725.m3641.l6368

how do you qualify good quality?

 

[One Day]

8x4 Far Eastern Marine Plywood Sheets 18mm x 1220mm x 2440mm | eBay - http://www.ebay.co.uk/itm/8x4-Far-Eastern-Marine-Plywood-Sheets-18mm-x-1220mm-x-2440mm-/272422381309?_trksid=p2141725.m3641.l6368

how do you qualify good quality?

ply isn't what it used to be. that's for sure. certified ply costs 3x as much. but for general use, if it looks ok and isn't as rough as a badgers behind, i class it as 'good'.

 

[Ajax123]

nice to know Im buying well... mind you ive spent nearly £30k with my timber merchant in the last 18 months so I would expect good prices... I have no idea where they source their timber but where Ive needed C16 they have always supplied C24, their fence panels are really cheap but use 18mm feather edged board as opposed to 10mm which is standard for the likes of wickes etc... all in all they are a pretty god supplier

 

[One Day]

Nice typo! I'm sure they'll appreciate the massive commendation!

 

[hmtiling]

A pretty one too

 

[Ajax123]

Im getting close to the point now where I wil be putting in my wetroom tray. Bought Marmox in the end as got a really really good deal on it. I need to stick it down to the plywood. SO my question... what adhesive should I use. Standard set flexi, rapid set flexi, something extra special. and what primer... is there a special primer for plywood. If it were screed I would know...but its not so Im asking.

Also I have purchased some natural slate from Walls and Floors for the floor along with some sealer... do I use the same addy for those... and finally I bought Mattstone sealer... from memory this goes on before grouting then again after grouting...is that right.

thanks in anticipation as usual...pictures will follow shortly.

 

[One Day]

Alan, I'd use any old S1 adhesive to stick the tray with. 10mm notch, nice wet mix and back-skim the tray.

 

[Rich Midge]

Usual logic applies, try to stick with the same manufacturer throughout the process. Prime every edge and face of the ply not just the surface receiving the tiles. I'd go with an S1 rapid addy. LTP Mattstone is a good sealer but imo there's better out there. You'll most likely need to reapply every couple of years at least. DryTreat Original is a fantastic impregnator, and don't forget @Lithofin BOB. They do some superb products, from cleaning through to sealing.

 

[Ajax123]

Usual logic applies, try to stick with the same manufacturer throughout the process. Prime every edge and face of the ply not just the surface receiving the tiles. I'd go with an S1 rapid addy. LTP Mattstone is a good sealer but imo there's better out there. You'll most likely need to reapply every couple of years at least. DryTreat Original is a fantastic impregnator, and don't forget @Lithofin BOB. They do some superb products, from cleaning through to sealing.

cheers Impish... Will probably use something from Tilemaster or Norcross... Although given that I will only need probably one or maybe two bags I might well just get some mapei from B&Q.

Impish .... thanks... I will be doin every thing I can to make it work. I am buying very aggressively generally but wont cut corners on the installation. the mattstone sealer came with the tiles so was also a very good deal...

 

[Lithofin BOB]

Your mattstone ,should be fine for this instalation
Once all moisture is released from the instal , 1-2 saturations, remove all excess
Let cure ,12-24 hours
Check grout release
Grout, once fully dry, final application to impregnate all.

 

[Ajax123]

Thanks Lithofin Bob. good info... what does Grout release mean??

 

[One Day]

Thanks Lithofin Bob. good info... what does Grout release mean??

It means it washes off the surface of the stone easily, without needing to scrub.

 

[Ajax123]

Ah..of course. i.e. seal the tiles ungrouted then try a small area with grout and make sure it comes off easily... if it does then grout. If it doesn't apply another round of sealer....

Now I understand...

 

[Ajax123]

Well... Here we go... About to mosaic tile the shower floor... first ever time with mosaics. There does seem to be a lot of mesh on them though .... will post some pics once its done

 

[One Day]

Well... Here we go... About to mosaic tile the shower floor... first ever time with mosaics. There does seem to be a lot of mesh on them though .... will post some pics once its done

Mosaic trowel Alan and tamp them down using a grout float. Nice and easy!