S
SB4U
Hi Everyone. I'm currently DIYing my en-suite shower room and could do with some advice re tanking.
The floor is a new sand and cement screeded floor with in-screed UFH and an Impey Aquagrade former as the wetroom style 'tray' which needs a tanking membrane on it. The dimensions of the former are 1050x1350. I will be installing some shower screens though, so it won't be a full wetroom as such so was intending on not tanking the floor far beyond the tray itself.
The walls are plastered blockwork, although where I removed the tiles from the old shower cubicle, and a few other places, the plaster skim came off too leaving just the first coat plaster. The walls are surprisingly level though, apart from one which is all over the place.
I'd originally planned on using Impey Tilesafe tanking on the former and part way up the walls, as that was what was recommended by the Aquagrade supplier but we've since decided on large format tiles (300x600x9) and I think the plastered walls, or indeed the Tilesafe, won't take their weight as they'll be over 20kg/m2. So I thought that maybe it would be a good idea to dot and dab plasterboard to the walls (plus through fixings) and tank that. Tilesafe still wouldn't be suitable but Impey also do a product called Waterguard which has a higher load bearing capcity of 30kg/m2 which would do the trick. Plus, an added advantage to installing plasterboard is that it will hopefully make tiling with the large tiles easier for me as the substrate should be more level.
Alternatively, rather than tanking the walls at all, I could possibly use something like Marmox or Wedi in the shower area and just use a tanking membrane on the floor. But I thought as there'd be enough membrane left over after doing the floor I could save a bit of money by using that on the walls over normal plasterboard. This project has already cost a small fortune (and many months of time too!) just to get it to this stage, although you'd never believe it by looking at it, so it would make a nice change to save a bit of money.
Or alternatively I could tank the walls with WP1 and use a cheaper membrane on the floor, like Homelux maybe.
Arrrrggggghhhhh. Too many options!!! What would YOU recommend?
Steve
P.S. I was going to upload some pics but couldn't work out how to do it. Might try again later.
The floor is a new sand and cement screeded floor with in-screed UFH and an Impey Aquagrade former as the wetroom style 'tray' which needs a tanking membrane on it. The dimensions of the former are 1050x1350. I will be installing some shower screens though, so it won't be a full wetroom as such so was intending on not tanking the floor far beyond the tray itself.
The walls are plastered blockwork, although where I removed the tiles from the old shower cubicle, and a few other places, the plaster skim came off too leaving just the first coat plaster. The walls are surprisingly level though, apart from one which is all over the place.
I'd originally planned on using Impey Tilesafe tanking on the former and part way up the walls, as that was what was recommended by the Aquagrade supplier but we've since decided on large format tiles (300x600x9) and I think the plastered walls, or indeed the Tilesafe, won't take their weight as they'll be over 20kg/m2. So I thought that maybe it would be a good idea to dot and dab plasterboard to the walls (plus through fixings) and tank that. Tilesafe still wouldn't be suitable but Impey also do a product called Waterguard which has a higher load bearing capcity of 30kg/m2 which would do the trick. Plus, an added advantage to installing plasterboard is that it will hopefully make tiling with the large tiles easier for me as the substrate should be more level.
Alternatively, rather than tanking the walls at all, I could possibly use something like Marmox or Wedi in the shower area and just use a tanking membrane on the floor. But I thought as there'd be enough membrane left over after doing the floor I could save a bit of money by using that on the walls over normal plasterboard. This project has already cost a small fortune (and many months of time too!) just to get it to this stage, although you'd never believe it by looking at it, so it would make a nice change to save a bit of money.
Or alternatively I could tank the walls with WP1 and use a cheaper membrane on the floor, like Homelux maybe.
Arrrrggggghhhhh. Too many options!!! What would YOU recommend?
Steve
P.S. I was going to upload some pics but couldn't work out how to do it. Might try again later.
I've just received a sample of Waterguard this morning. Looks good (to my untrained eye anyway). I'm thinking I'll use that on the floor and then there should be enough left over to do a metre up the walls in the shower area. I'll then use the Ardex from the top of the Waterguard to the ceiling, covering the joints and fixing points as what 
