Using SLC to bring existing floor height to the height of extension floor. - TilersForums.com

[Bill]

25mm is the worst part, parts are much lower. its going over retro fit wet underfloor heating mats, hence the use of leveller.

So are you not putting insulation boards on top of the floor first?

 

[Flintstone]

What’s the underfloor heating system that your proposing to level over ?

 

[Old Mod]

So are you not putting insulation boards on top of the floor first?

What’s the underfloor heating system that your proposing to level over ?

Do you not think he may mean polypipe or similar?
As it’s a retro fit wet ufh system?

 

[Bill]

Do you not think he may mean polypipe or similar?
As it’s a retro fit wet ufh system?

I thought retro fit mats meant after the solid floor was in?

 

[Old Mod]

I thought retro fit mats meant after the solid floor was in?

The way I interrupt the situation is that the original house is 25mm lower because there’s ufh in the new screed and a retro fit system will be fitted to the existing and then levelled over to bring it up to one level.
Personally I’ll always level over any polypipe style ufh anyway, so I suppose that’s how I’d want to interrupt it.

 

[Dumbo]

Probably a good idea to get flor level first but not built right up ufh so ufh boards dont rock . Fit ufh then bring up to level of rest of house with levelling comp.

 

[AP tiler]

They are pro fix panels Ultra Low Profile Underfloor Heating Panels - Floor Insulation Panels - http://www.profixpanel.co.uk/profix-panel.php.
supplied and fitted by Underfloor Heating from Underfloor Heating Systems Ltd - https://www.underfloorheatingsystems.co.uk.
They have advised the builder i'm working for to self level directly ontop of the panels/mats. They've gone ontop of the existing part of the house floor. in the extension part of the house the UFH is just a standard wet system under the screed.