Tiling onto Ply, can it be a success?

[AD1]

Tiling area is 38m2, How many bags are we thinking with S1? .. I had 14 of the S2.

 

[Just Rizzle]

WHY DO YOU HAVE WOODEN HANDLES ON PANS.
ANSWER BECAUSE WOOD IS AN INSULATOR.

take up all the wood and replace with 2 layers of backer board 90 degrees to each other both adhered to the screed floor and the other to the 1st layer of backerboard. this will allow better heat transference so reducing you soon to be sky high heating bills if you have wood as the layer above your ufh,and also reducing your 100% chance of failure due to the ply or wood.

 

[AD1]

The heating has been installed for 1 year already and works perfectly. Heating bills have went down, floors are warm to touch even with laminate flooring. I realise backer board would be better to tile on than ply hence why I am getting advice and hence the title of the thread.

Can someone respond to my previous comment on the correct adhesive from CTD?

I am now going to return the BAL grout for standard wide joint.

Thanks.

 

[Just Rizzle]

ardrit x7 with ardrion 90 aditive if that s the way you want to go

 

[J Sid]

[QUOTE Can someone respond to my previous comment on the correct adhesive from CTD? [/QUOTE]

I did, see above 😀

 

[Wayne Brown]

6mm for me with those mats for full coverage.

Am I reading this right, you have put ply over an anhydrite screed with ufh?

I thought that bud why fit ply over the screed ? It is such a poor conductor of heat and is a laminated product any moisture in there will result in failure of the floor there are far better options. Kop

 

[AD1]

The Screed is between the joists and not load bearing. It is supported by the insulation underneath. The 18mm ply is the structural load bearing floor and although it does insulate, it doesn't make the system ineffective and requires the flow rate to be slightly higher than a screed floor.

After living with it for a year I can say I'm impressed with the efficiency and performance and I must say I was sceptical before installing it.

 

[On one]

Somewhere along the line it sound like you are going to have an edge of your 18mm plywood that won't be mechanical fixed down to the joists(in between the joists) Ditra will only accommodate lateral movement, not vertical movement.

 

[Glynn]

Magix might be nicer than Setaflex?😉

 

[AD1]

I've gone with Mapei Keraflex Maxi S1.

Thanks for the advice.