Aqua Dec installation and sub-floor advice

[jordelver]

Hi,
I'm a newbie DIYer and probably in way over my head. There is no turning back. There may be tears

I am going to be installing an Aqua Dec in my bathroom. The whole of the floor including (obviously) the Aqua Dec are going to be tiled. Large tiles for most of the floor with smaller (textured) mosaics for the shower area.

The bathroom is currently all timber floorboards - 22mm thick. The Aqua Dec is also 22mm thick, however I'm also going to be installing underfloor heating (Devimat) and I was going to lay an insulation board of some type to a) insulate the floor for the heating, and b) create a nice flat surface to tile onto.

So, by the time I add on the thickness of the insulation board and tiles, either the Aqua Dec is going to have to be made higher, or the rest of the floor lower or else I'm going to be going up a step to get into the bathroom.

Given this, what would be the best course of action? I could remove floorboards, put down ply and an insulation board with the hope I can find those materials in the correct thicknesses. Would that be strong enough?

Thanks for any advice you can give.

Cheers,
Jordan

 

[DHTiling]

Hi jordan and welcome.........you could give wetdec a shout and he can talk you through it... WETDECS

 

[jordelver]

Thanks for reply Dave. Yeah, I could call them but I don't want to mess them about as I'm planning on doing this myself.

It's not the Aqua Dec I'm worried about (at this point anyway!) it's getting the heights right. There are loads of different products out there and trying to pick the right one can be daunting I'm confident I'll be able to put down something new, just wondered what you guys would use?

 

[DHTiling]

Tony will still help i'm sure..he is the guy when it comes to wetroom product information etc...

pm him direct .. http://www.tilersforums.com/private.php?do=newpm&u=4976

 

[jordelver]

OK, thanks Dave. Just tried and got:

wetdec has exceeded their stored private messages quota and cannot accept further messages until they clear some space.

 

[DHTiling]

OK, thanks Dave. Just tried and got:

:lol:.typical.......leave it with me.......

in the mean time some of the members who have used that tray might be able to help...

i haven't fitted that type so can't comment....

 

[jordelver]

Nice one, thanks.

 

[wetdec]

Hi Jordan, got your pm at last

Ok from what you say you have :

22mm of chip board existing

An aqua dec wet room former

A Devimat heat pack


As I See It You will Now Have to :

Take up existing floor

Put an insulation between joists at top

Overply your floor with 18/22 mm ply

Cut out for your aquadec

Batten off joists to under board aqua-dec

Fit your aqua-dec

Tape your transitions and corners with a flexible tape

Tank your wall areas

Tile your walls

Fix your gulley collar

Lay a tanking membrane to your floor

Lay Devimat (not over base imo)

Fix floor tiles.


Hows that m8 ??



The Tilers Forums is here to help everyone....... often asking the questions first can prevent the worries later....:yes:



tiler

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[jordelver]

Hi Jordan, got your pm at last

Better late than never

Ok from what you say you have :
22mm of chip board existing

An aqua dec wet room former

A Devimat heat pack

Pretty much, but 22mm standard floorboards rather than chip board.

Sorry, I need a bit of clarification with of some of the terms used

As I See It You will Now Have to :

Take up existing floor

Put an insulation between joists at top

Overply your floor with 18/22 mm ply

So, put an insulation board on top of the joists, and then ply on top? Or, just put normal (loft type) insulation between and then ply on top of that?

Cut out for your aquadec

Batten off joists to under board aqua-dec

Fit your aqua-dec

Tape your transitions and corners with a flexible tape

Tank your wall areas

Tile your walls

Fix your gulley collar

Lay a tanking membrane to your floor

Lay Devimat (not over base imo)

Fix floor tiles.

Ok, but what do you mean by "Batten off joists to under board aqua-dec" and what's a "gulley collar". Is that to the trap?

Hows that m8 ??

Very much appreciated. Thanks for your time

Cheers,
Jordan

 

[jordelver]

Just thought of another thing. I forgot to mention that I have bought a 10m2 Impey Tilesafe tanking kit. The wet room shower area floor is approx 1300mm x 1300mm. What should I seal the rest of the room with. I was going to go right up the walls with the Tilesafe within the shower area. What'd reckon?

 

[wetdec]

Quote:
Ok from what you say you have :
22mm of chip board existing

An aqua dec wet room former

A Devimat heat pack
Pretty much, but 22mm standard floorboards rather than chip board.
Ah ok hadnt realised that
Sorry, I need a bit of clarification with of some of the terms used

Quote:
As I See It You will Now Have to :

Take up existing floor

Put an insulation between joists at top

Overply your floor with 18/22 mm ply

So, put an insulation board on top of the joists, and then ply on top? Or, just put normal (loft type) insulation between and then ply on top of that?

I am trying to keep your height down here so put Kingspan or similar level with top of joists then ply over

Quote:
Cut out for your aquadec

Batten off joists to under board aqua-dec

Fit your aqua-dec

Tape your transitions and corners with a flexible tape

Tank your wall areas Using tilesafe (not for stone) to over run base by 50mm

Tile your walls

Fix your gulley collar None

Lay a tanking membrane to your floor Tilesafe (will not prevent latteral cracking)

Lay Devimat (not over base imo)

Fix floor tiles.
Ok, but what do you mean by "Batten off joists to under board aqua-dec" and what's a "gulley collar". Is that to the trap?

Impey installation instructions give the aqua-dec as under boarded, you batten between the joists and lay ply to support the aqua dec. The drain collar is a waterproof collar used to make sure 100% sealed. Impey dont supply these with their kit.

Ok 10m2 tilesafe kit see above.



tiler



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[jordelver]

Ok, thanks!

 

[wetdec]

Its updated for you



Tiler

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[jordelver]

I am trying to keep your height down here so put Kingspan or similar level with top of joists then ply over

Ok, I'm with you. So Kingspan is a thin insulating board?

Tank your wall areas Using tilesafe (not for stone) to over run base by 50mm

I presume that I only need to tank the shower area walls and not the whole bathroom?

Lay a tanking membrane to your floor Tilesafe (will not prevent latteral cracking)

OK, do I need to tank the whole floor? Only the shower area is going to get wet. I don't think I'll have enough membrane to do the whole floor. Will that affect height?

Impey installation instructions give the aqua-dec as under boarded, you batten between the joists and lay ply to support the aqua dec. The drain collar is a waterproof collar used to make sure 100% sealed. Impey dont supply these with their kit.

OK, I see what you mean. I've checked out the install guide and understand that now. I have the fitting kit for the drain trap etc.

Thanks for your help with this

 

[wetdec]

Ok, I'm with you. So Kingspan is a thin insulating board? No kingspan is an insulation board v hard foam with foil one side

I presume that I only need to tank the shower area walls and not the whole bathroom? Tape your corner and where floor meets walls, tank all floor and walls in wet area

OK, do I need to tank the whole floor? Only the shower area is going to get wet. I don't think I'll have enough membrane to do the whole floor. Will that affect height? You have 10m2 you will only use 2m2 on floor if its only 1.3x1.3 ?

OK, I see what you mean. I've checked out the install guide and understand that now. I have the fitting kit for the drain trap etc.

Thanks for your help with this

See above m8


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[jordelver]

No kingspan is an insulation board v hard foam with foil one side

Ok, I see. So presumably I'm going to need 18mm ply and a 4mm kingspan ro make up the 22mm? Where can I can kingspan?

Tape your corner and where floor meets walls, tank all floor and walls in wet area

Okey dokey.

You have 10m2 you will only use 2m2 on floor if its only 1.3x1.3 ?

Oh yes. Maths was never my strong point :| That's ok then

Thanks for help.

Cheers,
Jordan

 

[wetdec]

It goes between the joists its an insulator doesnt affect the floor

Kingspan Building Fabric Insulation: UK

 

[jordelver]

It goes between the joists its an insulator doesnt affect the floor

Kingspan Building Fabric Insulation: UK

Ahhh. I see. Got there in the end didn't we

Which product do I need? There are loads on the site, quite confusing to someone like me

 

[DHTiling]

Told you wetdec would sort it for you.......

 

[jordelver]

Told you wetdec would sort it for you.......

Ha! Cheers Dave. Thanks for the point in the right direction

 

[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: