Electric UFH heating under carpet as well as tile - Tile Advice

[Chris Gibbs]

I have a job to do in this lovely house... under tile heating in all bathrooms and en-suites. Thing is though in the two main bedrooms he doesn't want to see a radiator on the walls so asked if I could continue the under floor heating under his carpet.
the flooring at the moment is wayrock chipboard. I was thinking; maybe a tilemaster membrane over the floor with a 3mm bed of flexi, then under wire heating then a 10mm latex SLC, or would you use hardi backer boards, or even cement boards on the floor instead of a membrane?
All advice greatly appreciated.
Chris.

 

[One Day]

10mm thermal boards on the tiled floors (wedi etc) then slc onto the wires. Then just tile. Belt and braces, or if it's a large area - uncouple (ditra etc).
Carpet - I would do the same as for tiled, but make sure that the underlay is low enough tog rated for ufh. VERY important or heat gets trapped and damage occurs.
Also check the requirements carefully with ufh manufacturer when it comes to fitting under carpets.
Please don't use Hardibacker - it's rubbish!

 

[Chris Gibbs]

10mm thermal boards on the tiled floors (wedi etc) then slc onto the wires. Then just tile. Belt and braces, or if it's a large area - uncouple (ditra etc).
Carpet - I would do the same as for tiled, but make sure that the underlay is low enough tog rated for ufh. VERY important or heat gets trapped and damage occurs.
Also check the requirements carefully with ufh manufacturer when it comes to fitting under carpets.
Please don't use Hardibacker - it's rubbish!

many thanks Impish

 

[Flintstone]

I darent post a link but there's a popular site that sells different kits for fitting under carpets, have a google, it's a different sort of Matt.

 

[Chris Gibbs]

I darent post a link but there's a popular site that sells different kits for fitting under carpets, have a google, it's a different sort of Matt.

yeah its like a foil backed one that you slc over... I'm just wondering about the cement board to lay it on though? the more I think about it the more bullet proof it seems.
thank you though.

 

[Flintstone]

I'd ask the supplier mate see what they recommend, totally different to tiling

 

[One Day]

Heck I must be tired! Soft floor covering over 10mm wedi would be a bad idea - SORRY! Under carpet you're probably better off using HB (there - I said it!)

 

[Flintstone]

Insulation boards or insulated underlay are what you need rather than hardie or ply or anything like that

 

[Old Mod]

You can use variopro under carpet with a 10mm SLC covering, in bathrooms over insulation board and 5mm SLC

Variopro installation manual

 

[Chris Gibbs]

You can use variopro under carpet with a 10mm SLC covering, in bathrooms over insulation board and 5mm SLC

Variopro installation manual

thank you for the link... I don't suppose you know if you can connect extra length to the heating cable? the area is about 36m, the site only says the cables go up to 19m. looks just what I'm after though

 

[Old Mod]

thank you for the link... I don't suppose you know if you can connect extra length to the heating cable? the area is about 36m, the site only says the cables go up to 19m. looks just what I'm after though

The maximum length of cable will be determined by the amount of current the system draws.
You mentioned it was over several rooms, it wouldn't make sense to have it all controlled by one thermostat, each room would want its own.
Why heat a room if it's not being used.
And personally I'd prefer a bathroom to be warmer than my bedroom.
But it is a great system and simplicity itself, just as the Schlüter system is.

 

[Chris Gibbs]

The maximum length of cable will be determined by the amount of current the system draws.
You mentioned it was over several rooms, it wouldn't make sense to have it all controlled by one thermostat, each room would want its own.
Why heat a room if it's not being used.
And personally I'd prefer a bathroom to be warmer than my bedroom.
But it is a great system and simplicity itself, just as the Schlüter system is.

View attachment 88596 View attachment 88597 View attachment 88598

yes its exactly what I was thinking... impressive system (and expertly laid may I add)
the rooms are master bedroom 36m, en-suite 4m, guest bedroom 35m, en-suite 6m, main bathroom 10m. so it would have 5 thermostats. its just if the system would do the bedrooms really... I hope so as it looks the real deal.

 

[Old Mod]

yes its exactly what I was thinking... impressive system (and expertly laid may I add)
the rooms are master bedroom 36m, en-suite 4m, guest bedroom 35m, en-suite 6m, main bathroom 10m. so it would have 5 thermostats. its just if the system would do the bedrooms really... I hope so as it looks the real deal.

Well with regular electric UFH it should not be run beneath permanent items of furniture or sanitary ware. I can't imagine this being any different.
So you would preferably have some kind of room layout plan to work to, therefore avoiding wardrobes and the like. By the time you leave these spaces out, as you can see in the images above, you may well find you're down to 20m2 anyway.
However, most controllers take multiple mats, up to 4 normally I think, so increaseing the m2 up to even 30m2 from 19m2 is never going to be a problem.

 

[Old Mod]

Well I did NOT know that!
Just had a look at @Uheat - Jake website? one of our sponsors, and they do a similar system.
I couldn't see which floor coverings it's suitable for, but I'm sure they can easily supply that information in a post here.
Which would be interesting for future reference.

Uheat, UFH with decoupler

 

[J Sid]

Well I did NOT know that!
Just had a look at @Uheat - Jake website? one of our sponsors, and they do a similar system.
I couldn't see which floor coverings it's suitable for, but I'm sure they can easily supply that information in a post here.
Which would be interesting for future reference.

Uheat, UFH with decoupler

#Agree