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i dont know the Knaff product in question @Hack 73 so maybe best to ask them? If its a thermal tile back board then yes.

oh no, ive seen so many no nos in this thread. first fix a thermal tile backer board, like wedi/marmox or Delta. 10mm thick. lay ufh heating mats, but dont tile directly ontop of mats.......its not best practice......lay a self levelling compound over matting, you can buy one now thats ready...

Hi @jasonss2016 Ply and tiles are not natural bed fellows, i would always point the clients into over boarding with a rigid backer board like Hardie or No More Ply. I will add NMP to your price comparisons. The sheets are 600x1200x6mm so you would need 7 boards. NMP is fixed using a special...

grout protector spays are fine, always try and recommend them tbf, however, you need to combine this with a PH neutral cleaner (not bleach) as bleach would just strip the sealer. another option would be to go over the grout with Universeal Grout Rescue Colour & Seal

we used to sell a delta board in 2400x600x12.5mm however, this was only sold in our trade counter as shipping of this board would reuqire 2 pallets (ie too expensive) the 12.5mm delta board is now available in 900x1200 so it easier to transport.

Yep, give a local tiler a call, they should do a free no obligation quote. Least then you can find out what needs doing prep wise.

Hi @coling1988 you could look at fixing a tile backer board to the solid wood floor? thickness vary, you can get 6, 10, 12.5 and 20mm Delta Boards. these are 600x1200 in size. you will have to be wary of the different substrates meeting however, this will require an expansion strip

it would cost you less than £50 to buy a tanking kit for a standard shower, use normal plasterboard if you wish, the Tanking Kit we sell is an advanced sealing system based on co-polymer technology. it is designed to produce a barrier to moisture that is flexible enough to accommodate slight...

@Micky76 From the looks of the photo you have an issue were water is getting in to the back of the tile and causing the tiles to go like this.. was the area tanked/waterproofed before tiling? you might want to check if these are any pin holes in the grout, also check silicone seal around the...

heres quite a handy goto brochure from PCS (the makers of the Delta range of Wetroom and Tile Backer Boards) Delta Wetroom Brochure there are quiet a few different types of tray available and some fitting instructions are on the link above there is also a youtube installation video

@pody make sure you lay a self levelleing screed over the UFH........its best practice, everything else you have done prep wise is spot on IMHO. Level then you can put your baton down as you wish.

1 mm a day upto 40mm, 2mm a day after is the general rule. What type of screed is it?

id rip out and put a 6mm delta board (marmox/wedi type board) then tile with s1 adhesive. not a hard job at all.

i think this is starting to sound like an installation issue........ heres how a level access wetroom should be prepped.

Hi @bilabonic Universeal Grout rescue colour and seal is your answer. Universeal Grout Rescue Grout Colour Sealer is a great way to restore and renew your wall and floor grout to a better than new condition. Grout Rescue colour sealer is available in 10 stylish colours, when fully cured...

oh dear, sounds like the builder has dot and dabbed.......which is 100% the wrong way to tile, shame because it looks a decent job.

Hi @foxhole my understanding is that its because of condensation underneath. heres what the spec sheet for Tilemaster PrimePlus states: Plywood Overlay: Prior to tiling, ensure that new or existing boards are dry, i.e. conditioned to the environment in which they will be used. Plywood must be...

the grout looks a jasmin colour to me, pop into a local tile shop, ask to see there grout colour swatch, they should have a jasmin, see if it matches. It looks like a travertine you have, i bet that using the steam cleaner it has stripped all the sealer off the tiles (travertine like most...

Hi @conny can you check these are porcelain/ceramic, as they look like natural stone to me. Steam cleaner isnt going to do the grout any good either IMHO. If its NOT natural stone, there is a product on the market called universeal grout rescue colour and seal. Grout Rescue' colour sealer can...