Make life easy, search the forum.

Discuss Laying large limestone tiles over UFH in the Tiling on Underfloor Heating area at TilersForums. USA and UK Tiling Forum

S

Schoolrunmum

Please checkout the following advertisement.
Hello all,
We had a wet self levelling screed floor pumped into our kitchen back in October. UF Heating has been running well since. Just ordered 900x600 limestone tiles and need advice on prep before laying them. We have been told various things, conflicting too. Do I need to seal/prime the floor? Do I need a decoupling membrane? Do I use a fast or slow drying https://www.tilersforums.com/forums/tile-adhesive/? Do I use a flexi https://www.tilersforums.com/forums/tile-adhesive/?
Thanks in advance!
 

Ajax123

TF
Arms
Reaction score
933
I assume when you say pumped self levelling screed you mean something like Gypsol. If so...

Turn off the underfloor heating for 48 hours and carry out moisture test to make sure its dry. sand and vac the floor to remove any loose friable laitance or other contamination. Prime it using an acrylic primer and stick an uncoupling membrane down using a gypsum based https://www.tilersforums.com/forums/tile-adhesive/. then stick your tiles to this using a flexible https://www.tilersforums.com/forums/tile-adhesive/ suitable for the application and grout with a flexible grout. clean off and seal tiles once https://www.tilersforums.com/forums/tile-adhesive/ and grout are fully dried.

the gypsum https://www.tilersforums.com/forums/tile-adhesive/ is a medium rapid setting with a pot life perhaps 40 minutes to 1 hour. on top of the uncoupling membrane rapid set or standard set is largely a matter of personal choice.
 
OP
S

Schoolrunmum

I assume when you say pumped self levelling screed you mean something like Gypsol. If so...

Turn off the underfloor heating for 48 hours and carry out moisture test to make sure its dry. sand and vac the floor to remove any loose friable laitance or other contamination. Prime it using an acrylic primer and stick an uncoupling membrane down using a gypsum based https://www.tilersforums.com/forums/tile-adhesive/. then stick your tiles to this using a flexible https://www.tilersforums.com/forums/tile-adhesive/ suitable for the application and grout with a flexible grout. clean off and seal tiles once https://www.tilersforums.com/forums/tile-adhesive/ and grout are fully dried.

the gypsum https://www.tilersforums.com/forums/tile-adhesive/ is a medium rapid setting with a pot life perhaps 40 minutes to 1 hour. on top of the uncoupling membrane rapid set or standard set is largely a matter of personal choice.

The guys that laid it tell me its TS40 by Gypsol, if that helps..oh, and the tiles are being delivered tomorrow, but will have to stay outside till we lay them. Snow forecast here tomorrow, is cold likely to crack them or anything?? Also, can anyone recommend an acrylic primer?
 
Last edited by a moderator:
OP
T

Time's Ran Out

Use a primer recommended to go with your https://www.tilersforums.com/forums/tile-adhesive/.
Outside fine - keep off floor and covered.
 

Ajax123

TF
Arms
Reaction score
933
The guys that laid it tell me its TS40 by Gypsol, if that helps..oh, and the tiles are being delivered tomorrow, but will have to stay outside till we lay them. Snow forecast here tomorrow, is cold likely to crack them or anything?? Also, can anyone recommend an acrylic primer?

that's interesting as TS40 is not a mix. there is TS20 and TS15 but no TS40??? how deep is it? is it on insulation?? Who Laid it??
 
OP
S

Schoolrunmum

that's interesting as TS40 is not a mix. there is TS20 and TS15 but no TS40??? how deep is it? is it on insulation?? Who Laid it??
Hi Alan, apparently it's Classic...laid by Southern Screed..it's 50mm on Kingspan 80mm approx with wet UFH x
 

widler

TF
Esteemed
Arms
Reaction score
2,341
If you can get tilemaster use there matting along with anylfix to fit it and depending on the colour of limestone use either grey or white s1 tilemaster addy .
Id personally use standard set to fix the tiles .
Screed need sanding , vacing and priming using tm primer (if you can get it, if not use which ever addy you can get hold of)
 
OP
S

Schoolrunmum

I'll have a go at most things, but we have so many jobs to do we are getting a tiler in, but we have had 2 quotes, and both advised different things....
 
OP
T

Time's Ran Out

Tell us what was advised for an opinion.
Have they been recommended and have you seen their work .
 

Ajax123

TF
Arms
Reaction score
933
Hi Alan, apparently it's Classic...laid by Southern Screed..it's 50mm on Kingspan 80mm approx with wet UFH x
that's fine. I know they don't make a TS40 cos I work there... Classic is just the normal all purpose screed so treat as per advice above.
 
OP
S

Schoolrunmum

that's fine. I know they don't make a TS40 cos I work there... Classic is just the normal all purpose screed so treat as per advice above.
Thanks all, we have been told variously to use fast drying https://www.tilersforums.com/forums/tile-adhesive/, then slow drying, flexi and non flexi, and a decoupler...confuzzled!
 

Reply to Laying large limestone tiles over UFH in the Tiling on Underfloor Heating area at TilersForums.com

Or checkout our tile training advice or the Tile Standards

This website is hosted and managed by www.untoldmedia.co.uk. Creating content since 2001.

New Tiling Questions

UK Tiling Forum Stats

Threads
66,601
Messages
866,709
Members
9,513
Latest member
05jtaylor
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock