Hello

After basically doing everything possibly wrong in constructing a wetroom, but suprinzgly getting 3 years out of it before "Mushrooms" decended. Essentially my travertine tiles and porous grout, mixed in with a poor choice of floor adhesive destroyed the floor, tanking layer was intact, which gave me confidence to try again.

So this time, marine ply, marmox shower tray, Bal WP1, decoupling membrame Gmat with porcelain 2.5cm mosaics,
I am currently using Mapei C9 for the wall tiles (marvellous adhesive, hopefully appropriate) and Bal superflex will be used on the floor to hold the Gmat and then the tiles. Kerapoxy grey will be used on the floor.

However my dilemma is with the walls, ultimately I would like to use Kerapoxy up the walls, however the shower is an overhead type so low pressure.

Do I need epoxy grout ? As stated everything is tanked with WP1, and I believe the C9 is waterproof (in that it wont fall apart when damp, but not "let water through" waterproof)

So basically the walls will get very little "water action". I am new to epoxy grout, but feel confident to have a go on the floor, but not so confident up the walls, is there a product from Bal or Mapei or whoever that will suffice, although I know it ultimately will seap water.

Gratefully for any response.

Cheers

Mark

If your tanking I would use Mapei ultracolour..

Thanks for the reply, does it need an additive ??

Is it right to say the amount of water through the grout would be miniscule, and ultimately either evaporate or find it's way to the floor drain ?

You could use this, it's not to replace your tanking but spray onto the grout when it's dry Tradetiler Seal Guard

Ultracolour is a one part.

thanks again

For a 'True' epoxy grout, I only use Laticrete Spectralock, best epoxy grout I've ever used.

Thanks Yes looks the part, i ended up with Kerapoxy, dont believe the installation video for 1 second, but hopefully it wont be the nightmare everyone seems to imply.

FTM, how did you get on with the Kerapoxy?