Tanking - am I getting too picky

[Gixerguy]

Hi all,

I've had some great advice on here from Sir Ramic, Dave, (will post a few pics of progress so far shortly for entertainment) and many others and hope you can advise me again with my latest dilema 🙂

I'm installing a quadrant stone shower tray against two walls (brick/plaster) on a wooden plinth to raise 6inches for waste.
I know I need to tank and will prob use a membrane kit.

My questions start when I think about whether the tanking should run down the walls and BEHIND the plinth, or down the walls ONTO and INCLUDING the plinth. If the latter, I guess it goes on top of the ply and beneath the cement bed for the tray.

How much should I extend the tanking beyond the edge of the shower enclosure - if so I've thought about it and an uneducated guess is 300mm?

Also, I have standard joists/floorboards which I'm covering with 18mm WBP screwed & glued. Do I need to tank the whole floor too as I intend to tile it - common sense suggests I do but then common sense tells me to get a pro to do it all and I'm ignoring that! LOL

Many Thanks again for your advice guys, it is greatly appreciated!

Darren

 

[DHTiling]

Hi Darren... Remind me again about the job.... just as shower is it..?

 

[Gixerguy]

Hi Dave, its just a regular shower in the corner, not a wet room. Tiled walls floor to ceiling and hopefully a tiled floor. My last posts were 'almost suicidal now' with tile addy problems which you helped me with.

Thanks Dave!

 

[DHTiling]

Just use the membrane on the walls... Wetdecs sells the flexi corner tape and you can use this to also slightly over lap onto the tray to seal the tray to wall joint..

Tanking the shower platform is OTT...lol..and a waste of money..IMO..

 

[Gixerguy]

Thanks Dave, I'll go with your suggestion. Is tanking the floor OTT too?

 

[CDS]

Gixerguy, Have you fitted the showertray already? If not dry fix it and get it all levelled out then pull away from the walls and put a heavy bead of Silicon sealant on the wall and push the showertray into it. Smooth off any excess Silicon flush with the top of the tray and let it go off.

Once the Silicon is dry your tray won't move and you'll have a good base to apply a tanking solution. Apply tanking down onto the showertray (work out the tile thickness so you know how much you can overlap) mask around the tray so you can then be fairly liberal with the tanking. remove the masking tape, let it dry and happy tiling!!!

 

[Gixerguy]

Thanks for your help again guys!