Make life easy, search the forum.

Discuss Backerboards on wet ufh in the Tiling on Underfloor Heating area at TilersForums. USA and UK Tiling Forum

M

mike1979

Please checkout the following advertisement.
ok i went to look at a job wet ufh with flo screed on top all dried out etc the problem is in the dinning room they have laid a wooden floor and the tiles are to go around the primiter of the floor the into the kitchen through to the wetroom and basically they have lifted the former in the wetroom 6mm because they knew the wooden floor was going to be really thick so I suggest rather than trying to use leveller as it’s going to be an arse ache I suggested using a 4mm insulated backerboard and the customer said I was talking rubbish and a self leveller needed to be used as it would transmit the heat more than my backerboard any input would be great and if my board was a rubbish idea I shall hide in disgrace many thanks lads and good luck England tonight from a welsh lad
 
OP
D

Dumbo

The key here is the word that you use , insulation . Your choice of board will prevent or limit the transfer of heat from the subfloor
 
OP
M

mike1979

So you think by using the insulated backerboard it would prevent or limit heat ?? And I should self level it up 6mm
 
OP
D

Dumbo

First part definitely as you usually use insulated backer board to prevent heat transfer from electric ufh to the substrate so as only to heat the tiles .
Levelling compound will give better heat transfer .
 
OP
M

mike1979

That’s a good point and thinking about it I shall bow down to this one and agree fibre flex leveller it is
 
OP
F

Flintstone

I agree with the customer here, why wouldn’t you level i? It’s made for the job!
 
OP
M

mike1979

All points taken admit silly idea moment of brain madness we all have them get the Johnson 6x6 out loads of dots needed job done thanks for not insulting me too bad
 
OP
A

Alan Mearns

B3CA2472-7463-47DE-B101-83B01316C042.jpeg
The key here is the word that you use , insulation . Your choice of board will prevent or limit the transfer of heat from the subfloor
Hi I’m new to the forum and have a similar question. My builder is wanting to use hardiebacker board (12mm) (picture attached) on top on the laid water pipes. My concern is that unless they use a cement board specifically designed to be highly conductive, the Hardiebacker board will significantly limit heat transfer. Is this correct?
 
OP
D

Dumbo

View attachment 101808
Hi I’m new to the forum and have a similar question. My builder is wanting to use hardiebacker board (12mm) (picture attached) on top on the laid water pipes. My concern is that unless they use a cement board specifically designed to be highly conductive, the Hardiebacker board will significantly limit heat transfer. Is this correct?
I know expert on this matter but maybe you should phone hardi and get them to integrate the u values of their board and also no more ply and Beava board . I do expect their values to be similar in a like for like thickness . Cement boards transfer heat to a degree whereas foam insulation boards are designed to insulate so therefor wi limit heat transfer . But I would say that the builder is doing the correct thing . But one question why are you not using a tiler their are regularly people on here saying something gone wrong when their builder has tiled something . After all would you ask a tiler to build a wall
 
OP
A

Alan Mearns

Thanks for your reply. I will email hardiebacker and ask the question. I take your point regarding using a tiler. Reading this forum has highlighted how specialist this business is. Kicking myself.
 

widler

TF
Esteemed
Arms
Reaction score
2,341
hardie would be fine, and hardie will tell you so, it will heat up like a screed as it’s directly on top of your pipes.
So it’s just acting like a pumped or s/c screed
 
OP
W

Waluigi

Orbry Pro Ply to go onto wet UFH.

It’s listed in its technical literature.

HB and Aquapanel are also both suitable but can’t find any info on that.
 

Ajax123

TF
Arms
Reaction score
933
They have already laid a timber floor in the bulk of the area... timber a great insulator.... something like hardibacker board would be ideal. I agree annjnsulated backer board would present an minor issue but really at 4mm depth it is a technical and not a practical issue. The effect on the heating woild be very very small. It would also act as a very good uncoupling system. Trouble is customers always know better cosntheybhave read a brochure and listened to largely uninformed opinion from non tilers, and non experts in heating systems and screeds.
 

Reply to Backerboards on wet 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.

UK Tiling Forum Stats

Threads
66,599
Messages
866,698
Members
9,508
Latest member
sj1709
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