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Old 07-01-2020, 20:19   #1
DanHawkes
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Anyone experience of underfloor heating?

As per title......
I've built a summer house measuring 6m x 4m on a concrete slab. It's been suggested that it would benefit from underfloor heating. I'm not looking to spend loads as the summer house has already gone over budget.

I'm looking at the electric mats that you can get almost anywhere. Is there anything I need to consider or be aware of?

Any constructive comments appreciated. Cheers
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Old 07-01-2020, 20:56   #2
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Interesting... following this as its given me a idea.
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Old 07-01-2020, 21:08   #3
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Hi fella, I can suggest that you don't put just any one down, because if it goes, that's it unless you rip up the floors (I've got tiles). Warm up have been reliable for me although I have two large mats in the kitchen and I run them off 1 control unit which I replace once every 2-3 yrs, the bathroom one has been ok for 10 yrs and they're on all the time.
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Old 07-01-2020, 21:08   #4
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Mega money to run mate I would think twice
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Old 07-01-2020, 22:04   #5
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Mega money to run mate I would think twice
Really? I didn't think it was too bad. Originally I was going to just go with a couple of wall heaters and then someone suggested underfloor heating as a viable alternative. Does it take a long time to warm up?
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Old 08-01-2020, 08:30   #6
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Quote:
Originally Posted by DanHawkes View Post
Really? I didn't think it was too bad. Originally I was going to just go with a couple of wall heaters and then someone suggested underfloor heating as a viable alternative. Does it take a long time to warm up?
Underfloor heating is nice, but can be more costly to run than a "normal" radiator because you're paying to heat up the concrete slab and that heat is being leached out directly to ground.
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Old 08-01-2020, 09:03   #7
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This

Quote:
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Underfloor heating is nice, but can be more costly to run than a "normal" radiator because you're paying to heat up the concrete slab and that heat is being leached out directly to ground.
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Old 08-01-2020, 09:14   #8
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The trick with electric underfloor heating is to let it tick over i tell all my customers to keep it around 20c and adjust from there.
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Old 08-01-2020, 10:18   #9
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If the structure is properly insulate you can use a small electric radiator set to tickover.

My mate built a studio in his backgarden, 4x8meter, maybe slightly larger.
It's very well insulated and just uses one small wall-mounted radiator for heat, it's perfectly fine even in winter.
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Old 08-01-2020, 11:06   #10
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Quite expensive to run.
Ideally lay it onto 6mm tile backer insulation boards, then the heat should come up into the room & not back into the concrete mass.
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Old 08-01-2020, 13:20   #11
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Thanks for all the input gents.

I already have bought the insulation and some of the floor components - 50mm polystyrene sheets, damp proof membrane and 22mm T & G chipboard. I was told that the floor may feel cold as it is on a concrete slab. That's why the underfloor heating was suggested. I'd prefer not to go down the underfloor heat route if I'm honest.
The rest of the room is well insulated, so once the heat is in there it should stay. Plus I live darn sarf where it never gets too cold!
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Old 08-01-2020, 19:22   #12
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I fitted eletric underfloor heating in the kitchen, my mate went for proper system on separate boiler and totally regrets it.

I'm glad I did ours, we dont have a radiator or anything in the kitchen a d it takes the chill out and leaves nice and luke warm.

Defiantly doesnt cost alot to run, we have it under real oak flooring

https://www.theunderfloorheatingstor...eating-systems

Bought it from the above, great service, afterservice is top notch aswell when I needed advise on testing it before fitting etc

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Old 08-01-2020, 21:23   #13
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i have an electric systen under the tiles in my utility room ,you wouldnt want to HEAT the space but it defo takes the chill out the room ,its not expensive to run either
you need to run a fused spare off the main house fuse box ,but i believe you can now get plug in systems ,not sure how good they are
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Old 08-01-2020, 21:38   #14
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Quote:
Originally Posted by Rampant View Post
Underfloor heating is nice, but can be more costly to run than a "normal" radiator because you're paying to heat up the concrete slab and that heat is being leached out directly to ground.


I beg to differ. If you lay the UFH on suitable insulation it makes the heat travel upwards into the room instead of through the floor. Therefore itís not expensive to run if installed correctly, plus it heats a room more evenly than trying to pump a radiator on full blast.


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Old 09-01-2020, 09:16   #15
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Quote:
Originally Posted by DanHawkes View Post
Thanks for all the input gents.

I already have bought the insulation and some of the floor components - 50mm polystyrene sheets, damp proof membrane and 22mm T & G chipboard. I was told that the floor may feel cold as it is on a concrete slab. That's why the underfloor heating was suggested. I'd prefer not to go down the underfloor heat route if I'm honest.
The rest of the room is well insulated, so once the heat is in there it should stay. Plus I live darn sarf where it never gets too cold!
The insulation will make the biggest difference, heating pads or not. Although UFH is great (I have a water based system in our new kitchen) its really for rooms where you want continuous heat rather than occasional use as it does take a while to warm up and then cool down. If you just want anti-freeze then maybe just put in a small area?
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