Installing electric underfloor heating - Step by Step Guide

[Ian]

I just tweeted it as well.

What twitter name is the forum under?

 

[DHTiling]

Just click the link back tab above and you can tweet direct from the thread.

Tilers forums doesn't have a tweet account , unless Dan has set one up..

 

[Dan]

Daniel (ContractorForum) on Twitter

We have one for all, saves messing around following loads of accounts.

 

[jmc1234]

Re: Fitting electric underfloor heating.

Nice one Bri,

I am just about to lay insulation boards prior to UFH. Unlike yours mine have come without instructions so curious whether I should butt joint or leave expansion gaps. Most info on web suggess that you leave expansion gaps and fill with Flexi ady.

What do the experts think?

Thanks in advance

 

[Ian]

If in doubt, leave a 2mm expansion joint. May be worth contacting the manufacturer or supplier to see what they recommend.


Sent via Tapatalk for iPhone

 

[jmc1234]

Cheers Bri,
First UFH so appreciate the advice.

Thanks

 

[Straightline]

Great post, very informative ! Cheers !

 

[Dockers Tiling]

Cheers for guide Bri. Needed a refresher for a job coming up. Good to be re-assured that what I was going to do was right with the addition of S.L.C.

 

[Dannym80]

Good thread, Ive only ever used the boards once & that was 4 years ago now! Very useful info and has certainly refreshed my memory, cheers Bri.

 

[Living Heat Ltd]

Great post this sort of information is massively helpful to beginners and even experts as it clearly outlines the correct method. You would not believe the stories we could tell of what some people try and do when laying ufh.
The only information I would add is how to test the mat prior to laying it.
1[SUP]st[/SUP] Never connect the mat or cable to the mains power when rolled up as the heat in the middle of the role has nowhere to go and the cable will simply over heat very quickly.
You mention testing it during instillation and the watchdog that the mat you fitted came with but what if this is not supplied. Having a cheap multi meter £5-10 ish we have found is the best way to test mats. You can do a simple continuity test, resistance reading and insulation test all of which can be very useful readings and very easily obtained with this devise. The better units also have a watchdog type facility which will sound should you damage the mat during instillation / tiling. The reading you can get from these devises can be very useful especially if you ever have problems later down the road.
I hope this adds something useful.
[FONT=&amp]Andrew Knight.[/FONT]

 

[Ceramico tiling]

Cool post..Why do you need to apply the self levelling over the tile adhesive screed?

 

[Qwerty]

Cool post..Why do you need to apply the self levelling over the tile adhesive screed?

Apart from making a level surface to tile onto, it also protects the cable when troweling the adhesive as well as fully encapsulating it to ensure no air pockets and an even transference of heat to the tiled surface.

 

[AliGage]

As above.

I happened to of quoted for a UFH install last week and was asked the same question about the SLC. Another thing I mention is if you ever have to break out and replace a broken tile. Less risk of damaging the wire if it's in SLC and not burried in the adhesive.

 

[pgc555]

Was wondering why you don't just pour over the mats in one pour instead of thin set first? Seems to cut out one more steep and the tape on the Warmup mats will hold very well to the primed surface of the boards.

 

[Ian]

Was wondering why you don't just pour over the mats in one pour instead of thin set first? Seems to cut out one more steep and the tape on the Warmup mats will hold very well to the primed surface of the boards.

I find there's always a bit of cable that floats. I've tried both ways and putting a layer of adhesive down before SLC gives a better finish and also takes away the risk of snagging a cable when SLCing.