Shower tray

[Hawksley]

I'm about to refit my shower tray due to movement and leaks.

I have a new marine ply base with cement (wedi) board on top. I intend to use rapid set flexi tile adhesive to sit the shower tray on.

My question is; should I seal the cement board with an SBR primer or is that step not necessary?

 

[yorksbuilder]

It can only help to prime the board. I always prime with SBR

 

[Wayners]

Have you watched the skillbuilder YouTube videos on shower trays?

 

[Hawksley]

I haven't, I'll take look at that.

 

[Madrab]

My question is; should I seal the cement board with an SBR primer or is that step not necessary?

Not sure how well SBR does on wood as I believe it's primarily designed for mortars/renders etc?

Personally I would prime and tank (polymer liquid or cementitious based) the base and walls 1st.

 

[Hawksley]

Not sure how well SBR does on wood as I believe it's primarily designed for mortars/renders etc?

Personally I would prime and tank (polymer liquid or cementitious based) the base and walls 1st.

It's the backer board I would be priming with SBR rather than the ply.

 

[Hawksley]

Should I wait for SBR to dry completely or should it should it be tacky when I use the tile adhesive? I've looked at SBR manufacturers instructions but can't get a definitive answer.

 

[Madrab]

Backer board usually doesn't need primed, it's normally ready to accept the tiles as is.