What to wall and floor board

[Martysmarty]

Hi guys.

Planning my build ready for 24th this month to get it started so i am trying to get fully prepared. I posted a thread on what tray to go with but thats sorted now.

I am going to be shelling the room out, its very small at 1.5m x 1.8m. Theres a stud wall on one side of the shower quadrant (900x900) and a bricked cavity wall on the other.

I was thinking of using moisture resistant plasterboard, like knauf branded. Screwed to stud side, then dot n dabbed on brick side with some mechanical mushroom fixings in dabbed spots. As for the joins would i use a jointing cloth and could i use tile adhesive here to scrim it? Final tank it with ardex wpc? I see this can be mixed thick to fill pipe gland holes for mixer outlets.

Tiles are going to be 200x500 ceramics at 9mm. Should be good with ardex?

I need to ask about floor also but il do research before asking the questions.

Any help would be highly greatful.

 

[Old Mod]

That method will work, but it’s not best practice to be honest.
You’re better off fitting all wet areas with a Wedi style board, which predominantly already waterproof. The only area that will need waterproofing are the board joints and transitions, and over the top of the mechanical fixings.
No other board is water proof and will require full tanking.
Wedi style route is by far the most efficient in my opinion.
You can waterproof between the boards with Wedi 610 adhesive sealant, and just apply waterproof butyl tape in corners and over fixings.

 

[Martysmarty]

Well that looks good. So i could do say 1000x1000 wide in the corners of the quadrant area. I see the tape also sticks to moisture resistant pladterboard. Should MR plasterboard be used on the rest of the room or can i get away with standard board as long as wedi is used in the shower area?

Obviously theres a lot of vapor in a bathroom so i was thinking MR plasterboard should still be used in other areas? Maybe im going over the top?

 

[Dumbo]

That method will work, but it’s not best practice to be honest.
You’re better off fitting all wet areas with a Wedi style board, which predominantly already waterproof. The only area that will need waterproofing are the board joints and transitions, and over the top of the mechanical fixings.
No other board is water proof and will require full tanking.
Wedi style route is by far the most efficient in my opinion.
You can waterproof between the boards with Wedi 610 adhesive sealant, and just apply waterproof butyl tape in corners and over fixings.

View attachment 107017

Whose waterproof butyl tape do you use as my shop no longer sell the codex I used to use .

 

[Old Mod]

Obviously theres a lot of vapor in a bathroom so i was thinking MR plasterboard should still be used in other areas? Maybe im going over the top?

When it comes to protecting your bathroom and rooms below, I’m not sure you can go over the top tbh. Of course MR board is a better option.
In a perfect world, I’d do whole room in Wedi style boards.
But it’s rarely my budget that I’m playing with.

 

[Old Mod]

Whose waterproof butyl tape do you use as my shop no longer sell the codex I used to use .

Jerry to be honest mate, I don’t remember whose that is, but if TM do one, then that’s whose it’ll be. Other products used on site were TM.
That’s about the best I can say I’m afraid.
I’ve been to sleep since then mate.

 

[J Sid]

@jcrtiling
I used these Jerry

Aquafix Self Adhesive Butyl Waterproof Tape 20m x 100mm - TRADE ROLL

Aquafix Self Adhesive Butyl Waterproof Tape 20m x 100mm - TRADE ROLL. Great value, without any sacrifice in quality. Wet room waterproof tape is a key component in any wet room system. A strong polyethylene material backed with a self adhesive butyl rubber layer, the tape is used for bridging...

www.pureadhesion.co.uk

 

[Old Mod]

@jcrtiling
I used these Jerry

Aquafix Self Adhesive Butyl Waterproof Tape 20m x 100mm - TRADE ROLL

Aquafix Self Adhesive Butyl Waterproof Tape 20m x 100mm - TRADE ROLL. Great value, without any sacrifice in quality. Wet room waterproof tape is a key component in any wet room system. A strong polyethylene material backed with a self adhesive butyl rubber layer, the tape is used for bridging...

www.pureadhesion.co.uk

Thickness Julian?

 

[J Sid]

Thickness Julian?

good question, just had a look a some in van. Nothing to measure it, but compared it it to some bal rapid mat and about half that thinkness so about .5mm, to thin?

 

[Martysmarty]

Right so floor, planning on 331x331 9mm ceramic tiles. floorboards are 22mm victorian, its not practical to replace with ply as theres a partition wall on them. So, seen plenty of people saying a layer of flexible tile adhesive on the floorboards, then 6mm hardi board layed straight on? Any waterproofing required on the board joins? Thinking of water when getting out the shower

 

[Old Mod]

Hardibacker is NOT waterproof.
It is only unaffected by water.
If you want a particular area of the Hardie backer waterproofed, you must tank it.
The wpc you intend to use on the walls will be ok, but the hardie must not only be stuck with adhesive, but must also be secured by screws.
There are markings in the board to show you where, and screws must be countersunk.
And all joints must be taped with an alkali resistant skrim tape and covered with a skim of adhesive, the back edge if the trowel will suffice.
Use turbo golds from Screwfix and not hardie screws, they snap.
Make sure the original floorboards are screwed firmly to the joists first.
Ceramics are not ideal for a floor, so your prep must be exact, or you could experience cracked floor tiles.

 

[Martysmarty]

Thanks for that. Thats saved me cocking it up. And i didnt know that about ceramics either. The pattern the mrs wanted was the winchester patchwork style from wickes, i could try and source them in porcelain to be on the safe side. Will see

Thanks

 

[Martysmarty]

Advice taken. I have sourced the tiles in porcelain.

 

[Martysmarty]

Hi guys.

Im getting my order list together for sll the silly bits. Marmox washers/hammerfix, ardex wpc, sealants etc.

Do i need sbr primer on hardi with adrex wpc to tank floor?

I was going to order marmox multibond sealer, for general purpose. Is it decent stuff?

Shower tray and enclosure and all my big stuff has come already.

 

[Martysmarty]

looking to pick up the tile adhesive friday, i dont want rapid setting as id like time on it, most seem to be rapid setting but found some readily available mape adesilex p9 express addy, it says its good for on "solid" plywood bases so is this useable for ontop of my floorboards once secured good, for the hardi to go on top?

The other thing is can this be used as a grab/dot/dab adhesive for the jackoboards onto the brickwork before mech fixing?

i am using 9.5mm porcelain tiles for 98% of it, some ceramic on the wall for decorative strips.