Backerboards - TilersForums.co.uk | Tile Forums

dazzer · 20-06-2008

hi

do you need to tank backerboard before tiling, this is for a wet room area.
i was looking at the hardibacker boards,

thanks

daren

**wetdec** · 21-06-2008

Hi
the joints need taping, if there is plasterboard there already then using Durabase WP will tank it properly and you will know your safe m8

tiler

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**Dave** · 21-06-2008

Hardi backer is only a water resistant board..meaning that it will not break down with contact with water like plasterboard does.....so will need tanking...but if using some thing like Wedi board then you just need to tape the joints as wetdec said....

**wetdec** · 21-06-2008

Quote:

Originally Posted by Dave

Hardi backer is only a water resistant board..meaning that it will not break down with contact with water like plasterboard does.....so will need tanking...but if using some thing like Wedi board then you just need to tape the joints as wetdec said....

Thanks for clearing that up I was a bit vague

..

dazzer · 21-06-2008

hi I am installing this wet room in what is currently a single walled area.
I am using the trisco 10 insulation (amazing stuff) 30mm thick equivalent to 210mm of mineral wool on top of a 38 x 25 batton,
my question is either wedi board or hardibacker suitable for vapour control do I need to install an additional membrane behind the board ? or will be ok, normally I would install a foil backed plaster board in an area such as this. but as it's a wet room I need to use the wedi or hardibacker,
is this just a cemetatious board or something altogether different.
thanks in advance
daren

**wetdec** · 21-06-2008

Wedi is waterproofed when taped, Hardibacker needs tanking.

Vapour check plasterboard it and tank it with a membrane and it will be a solid job, you are making it more work and more expensive than you need m8

tiler

,,

dazzer · 21-06-2008

tiler,

just to be clear are you saying don't bother with a backerboard just use a vapour foil plasterboard and tank it,

would the dunlop waterproofing kit do the job for the tanking.

thanks

**wetdec** · 21-06-2008

Yes vapourcheck will do it and you need a waterproof membrane if you are going to do it properly not a paint on one

Have a look on the site m8

dazzer · 22-06-2008

Had a look at thr Durabase wp wet room tanking membrane seems ideal for the walls
, no need to use it on the floor as i am laying altro flooring.
would i just return this to the floor and lap by 100mm or just to the floor slab and tape the joint?

Sorry for all the questons but all new to me.

**wetdec** · 22-06-2008

Quote:

Originally Posted by dazzer

Had a look at thr Durabase wp wet room tanking membrane seems ideal for the walls
, no need to use it on the floor as i am laying altro flooring.
would i just return this to the floor and lap by 100mm or just to the floor slab and tape the joint?

Sorry for all the questons but all new to me.

No probs m8

Its a wet room is it with a concrete floor ??

dazzer · 22-06-2008

yes it is a wet room with a conrete floor

cheers