WBP Ply Sealing

[Aspesim]

Hi Guys

I'm currently doing my bathroom and need to purchase some WBP ply for the floor. I've read I need to seal the underside and sides, is this with PVA. I have some BAL bonding agent I used in my cloakroom for the walls should I use this?

Also what is Tanking and which product do you recommend? Is it painted on? do you have a basecoat and a topcoat? or do I have the whole concept wrong!!

Thanks
Simon.

[Tony73]

Hi, i vould recommend mapei products

[Tony73]

Mapelastic Smart. you can get all info on mapei web. easy to use

[timeless john]

- a forum sponsor PHG wetrooms can provide all your tanking needs - click on their Ad.
There are a few methods of tanking from painted on to rolled membranes and all have easy intructions.
Instead of ply if you have a stable, deflection free floor you could consider a waterproof board such as Wedi of Hardie tile backer.
Good luck

[Aspesim]

Hi John

The current floor has water damage from the old bath, I'll be putting down 18mm ply overlaid with 6mm tile backer board. (not sure which one yet)

[phil w]

Hi John

The current floor has water damage from the old bath, I'll be putting down 18mm ply overlaid with 6mm tile backer board. (not sure which one yet)

Had the same thing old water damaged chip board floor, added noggins across joists, might be worth thinking about while floor is up, then 18mm wbp board and 6mm marmox board, marmox rep told me to check tilefix direct.com as those where the cheapest around at the time (just before xmas), good service and delivery worth a look

[Aspesim]

Thanks Guys

What about sealing the underneath and sides. What should I use?
Is this done with the Mapei stuff as well (tanking)

[Tony73]

i think you dont need to do that

[pjc]

Had the same thing old water damaged chip board floor, added noggins across joists, might be worth thinking about while floor is up, then 18mm wbp board and 6mm marmox board, marmox rep told me to check tilefix direct.com as those where the cheapest around at the time (just before xmas), good service and delivery worth a look

not as cheap as these
Backer boards&SubCategoryName=Marmox&CategoryID=17&SubCat egoryID=123

[Gall.B]

Thanks Guys

What about sealing the underneath and sides. What should I use?
Is this done with the Mapei stuff as well (tanking)

Use the Bal bond you have for priming the ply (if it aint been sitting around to long or the same brand your gluing the boards with ie Mapei, Weber etc.
Best to use the same brand throughout for primer, addhesive, grout and tanking paste.

[Aspesim]

Hi Gall

Thanks for the advise. I will use the BAL primer. Do I prime the top (before Tanking) or just the bottom and all sides?

[Gall.B]

Bal primer APD should be in your tanking kit, use that or the Primer primer with your kit.

[Gall.B]

Primer provided : )