Aqua Dec installation and sub-floor advice

[wetdec]

Its all yours now m8


[FONT=&quot]Absum![/FONT]



tiler



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[DanG]

Hi Guys, I'm Dan. Been reading the forum on and off for a while but only registered today. Been following this thread with interest

I am doing a very similar project in a bung. renovation for my own use. I have bought an Aquadec 1mx1m and intend to tank the floor with Tilesafe. Two walls are freshly plastered and skimmed. The other 2 walls forming the shower corner I intend to form out of Wedi or Aquapanel. One of these walls is stud to make a cavity for pipework and shower the other is bare brick. Don't intend to tank them as I believe there is no need and I want to cover with Travertine which is approx 22kg/m2.

The floor is removed to install Celotex and run soil piping for a second bathroom and other pipework. I intended to replace the floor with 22mm WBP which should come level with the Aquadec then install the tilesafe over all with a 75mm up the walls.

I also want to install Devimat 100w underfloor heating. Now here come the queries. Where and how do I install do I install the thermostat sensor? Above or below the Tilesafe. How do I bury it in the WBP/adhesive/Tilesafe. What thickness of Wedi should I use for the walls. If I dot and dab the brick wall I'll use Wedi with dowels as Aquapanel recommend batten fixing only. Should I be thinking of thinner ply and then making up with a tilebacker etc. I will be putting noggins across to screw the ply edges to which will stiffen the floor and have added one dwarf wall to stiffen everything. The bathroom is 3mx2m.

Cheers, Dan

 

[Impey UK]

hi dan. in regards to the devi mat system on the tanking, the sensor needs to be located between two of the heating elements on top of the tanking to get a direct reading from the tiles and adhiesive,route out a groove in your ply or floor substrate big enough to take your sensor,sheathing and to line it with tilesafe.
also,be sure your plaster skim has dried out fully before applying the tilesafe tape.
cheers
shaun.

 

[Impey UK]

dan, if you want to use a backerboard for the walls 'hardy' do some very strong bonded thin boards that are priced well.

cheers

shaun.

 

[DanG]

Hi Shaun and thanks for the information. Just what I needed to know. I have already got the Aquadec2 and will get the Tilesafe as required. Didn't think about Hardiebacker board but will check out. Have made drawings of possible tile cuts for 300mm and 400mm tiles for tiling the Aquadec. Thanks again and regards, Dan:yes:

 

[wetdec]

Hi Dan

I would think your first concern would be laying stone over wood with under floor heating.

I am sure you are aware from reading the forum the latteral movement of wood can cause cracking of tiles and if you then add heat and travertine to the mix you are asking for trouble.

Tilesafe is a bituminous tanking membrane and does just what it says on the tin.....it tanks.........it will not act as a preventative to latteral cracking.

As for your walls there is nothing stopping you plasterboarding them and tanking with an off the roll membrane such as Dura-wp. This will ensure 100% tanking, be a professional job and likely cheaper.

As for underfloor heating there are cheaper equivelent products available where you are not paying for the name but the product.

Hope this helps
Cheers

Tiler

 

[DanG]

Hi Tiler, thanks for the input. All options are open at the moment. I didn't know about the possible cracking problem. I only ever want to do this job once ... my last major project. Last shower I did was tile on marine ply and a made to measure plastic tray set in mortar. No problem on 22 years except the grout. My wife wanted poppy! (1987) Looked good at the time. Regrouted white last year. Still looks good. Thanks and regards, Dan:yes:

 

[wetdec]

If you tell me what you have and what you want to do I will walk you through it Dan

tiler

 

[DanG]

Hi Tiler, this is what I have going on. Bathroom 3mx2m. Two walls newly plastered and skimmed. One wall bare brick. One wall is studded off brick to allow space for concealed shower. I have already an Aquadec 2 which I am going to install in the corner of the 2 unfinished walls on a joisted floor using 22mm WBP. All flooring is removed for insulating and pipework. Drain for Aquadec is straightforward along joists. My original plan was to put Wedi on the stud wall and dot and dab Wedi and dowel on the bare brick wall. Also on the bare brick wall will be a wall hung WC frame and a basin frame set in studding. The floor will be completely clear as any other furniture will be wall mounted off the floor. I have a heated towel rail fed by DHW. I want UFH as background/foot comfort heating. I would like to cover the walls and floor with Travertine. I think that's all, Dan.:yes:

 

[Gazebo]

Hi, just seen the thread about impey tilesafe, i have used it but i think you have to be careful if you plan to do the walls with the membrane upto ceiling height due to the loadings,,(dependent on weight of tiles etc) i am sure wetdecs would be the man to clarify this, but worth checking with him and/or impey, also a question to wetdecs if i may, you say the membrane will no cope with lateral movement, i used it as per instructions before (on floor, corners jointed and up walls so are you saying this wont work.? it was on a timber subfloor which i ply lined and supported the former as per instructions, walls were all brick/block plaster and shower wall studded out with aquapanel) just a bit confused about the lateral movement comment,,, will appreciate a reply as im now worrying about the installation last year...:whatchutalkingabout cheers for your help and will come to wetdecs for all my future tanking wet room installs.... i promise.