Shower surround substrate - Tile Advice

[STEvieXE]

Can the tanking take the place of the Hardie tape and adhesive?

Ie skip that stage?

What is my best way forward with this? The 2 stages combined?

 

[Waluigi]

For me personally I’d use the alkaline tape and tile adhesive. This adds a bit more strength as there are no noggins placed horizontally between your HB boards.

I’d Really push the adhesive in too.

Then I’d probably just run my tanking tape in the internal corner abutment.

Up to you whether you tape and tank the HB joints too. Be wary of ridging

 

[STEvieXE]

So the joints would be done to Hardie instructions and the just the tank painted over.

The tanking tape would only be used in the corners edges?

What is ridging? (Sorry!!)

 

[Waluigi]

Yes that’s correct. Ridging being a ridge built up on the joints if you tape them and then tank and tape them. For example, mosaics wouldn’t look great on that wall as you’d see a ridge!

 

[STEvieXE]

Ah I understand now!I think ill go with the tape n addy the Hardie joints n tank over but no tape and tape the edges!

Thanks for your help, it is really appreaciated

 

[STEvieXE]

When u say prime before hand whatever u do, I assume u mean the tanking primer?

The tape n addy joints don't need primed? As far as I am aware Hardie backer does not need primed?

 

[Waluigi]

Prime everything. Hardiebacker will definitely need priming despite what the instructions say. Let me guess- are you using the Mapei kit?

 

[STEvieXE]

Is it a decent one to use? I can get Mapei in my local screwfix which is handy to me.

https://www.NoLinksToThis/p/mapei-shower-waterproofing-kit/78484

How's that sound?

 

[Waluigi]

That’ll do the job just fine