Advice please heavy porcelain tile under cill reveal above shower - Tile Advice

[Chris G]

Hi , bit of advice if possible please . I’m tiling a shower cubical in 250x900 porcelain tiles . There is a step out at the top of the shower which requires fitting two full tiles to the under cill/reveal . Considering how heavy these tiles are and would not want them falling and badly injuring someone or worse can anyone advise on the best possible prep and adhesive to use . Substrate is newly plastered plasterboard .
Thanks

 

[Andy Allen]

You can't exceed 20kg per m2 on to plastered walls....
How heavy are your tiles..?

 

[Flintstone]

Those tiles shouldn’t be going onto any plaster, chris. Is that what all the walls are ?

 

[Chris G]

You can't exceed 20kg per m2 on to plastered walls....
How heavy are your tiles..?

The under cill/reaveal is 1400x250 , not sure exactly how hea

You can't exceed 20kg per m2 on to plastered walls....
How heavy are your tiles..?

You can't exceed 20kg per m2 on to plastered walls....
How heavy are your tiles..?

Hi Andy, not sure exactly how heavy two tiles would equate to until I go back to job tomorrow , but the under cill/reveal is approx 250(d)x1400(w) . Not goin to exceed 20kg/mtr

 

[Flintstone]

Hi Chris, if the tiles are regular porcelain, 8 - 10mm thick for example, they will exceed 20kg per m

 

[Chris G]

Those tiles shouldn’t be going onto any plaster, chris. Is that what all the walls are ?

They are solid walls but it is a boxing above the shower

 

[Flintstone]

Solid skimmed walls ?

 

[Chris G]

Solid skimmed walls ?

Yes mate

 

[Flintstone]

The tiles are too heavy chris.

 

[One Day]

Mechanically fix (and bond) wedi board into the lintel, using multiple anchors. Then ensure a solid thin bed of decent adhesive.
That will make sure they aren't going to pull the plaster off as gravity takes hold.

 

[Chris G]

The tiles are too heavy chris.

Mechanically fix (and bond) wedi board into the lintel, using multiple anchors. Then ensure a solid thin bed of decent adhesive.
That will make sure they aren't going to pull the plaster off as gravity takes hold.

thankyou for the advice impish , I’m going to see about this option.

 

[One Day]

thankyou for the advice impish , I’m going to see about this option.

Even a 6mm wedi/jacko/kerdi board will take the weight.
Concrete lintels can take a fair bit of drilling though.
I'd suggest SDS 8mm bit and these plugs:
Fischer High Performance Universal Plugs UX8 4.5-6 x 50mm 100 Pack - https://www.NoLinksToThis/p/fischer-high-performance-universal-plugs-ux8-4-5-6-x-50mm-100-pack/20669

Pushed in with a squirt of this:
Fischer FIP 300SF Polyester Styrene-Free Resin 300ml - https://www.NoLinksToThis/p/fischer-fip-300sf-polyester-styrene-free-resin-300ml/23386

Just charge it to the customer and explain it's neccessary.
They'll appreciate it.