Feel cheated - tanking moisture resistant plasterboard

[fredmila]

I went through the expense of installing (Knauf) moisture resistant plasterboard on all the walls and ceiling of my bathroom and now people say that I should tank it in the shower area.

Why the extra expense?

This is a shower above a bath, by the way. I am tiling from bath to ceiling and from wall to wall in the shower area.

 

[DHTiling]

It really depends on how often your shower is used but in most cases a normal electric domestic shower will not need to be tanked but if it is a power shower then i would IMO...if a shower is used a lot then the grout does not dry out and then water ingression happens.....there are a few ways around this.....

The moisture resistant plasterboard is simply that ..resistant, not waterproof so if the shower is heavily used then i would use extra protection for the substrate...be it a tanking solution or membrane.....the call is yours after all......

 

[smurf21]

use six mm wedi board around the bath tape joints (added expense but better safe than sorry.

 

[wetdec]

there is absolutely no benefit to using a substrate board instead of plaster board in a tanking situation other than from a retailers point of view...........Money mad world :yes:

Plaster board the walls and tank it properly with an off the roll membrane, less expense more surity............


tiler

..

 

[justlyndon]

Me personaly I would tank it. You will still get moisture through the grout unless its apoxy so a water resistant board is useless. A WP1 system is best to use I find. the problem with water resistant materials is that they are only good for splash really. if you think about it we average about 5 showwers a day these days if you include the kids so that is a lot of water . But thats my thought

 

[fredmila]

Me personaly I would tank it.....

Yeah I succumbed and tanked it

 

[justlyndon]

How didi it go mate? Stick some pics up

 

[fredmila]

'Ere, have a butcher's, but the tanking is already being covered with the tiles