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Underfloor Heating

Soldato
Joined
21 Oct 2012
Posts
11,088
Location
London/S Korea
I'm about to start a renovation of a flat I bought a couple of months ago. It currently has electric heating (no gas connection). I'm looking at changing this to an underfloor electric heating system. This should be more efficient as it will distribute the heat across the room and is far tidier which is the main reason for the change. I'm aware there are building regulation compliance requirements for part L with regards to U-values. Does anyone know about the procedure to achieve the compliance?
 
It is laminate at the moment. When I rip that up I expect it is concrete.

Thanks for the tips about testing the mat. I will definitely do that. I assume when it has been laid and is covered it will be a lot less vulnerable?

Do you know anything about the buildings regs? Do I need to apply for permission? Do I need to have an assessment done and certain thickness of insulation?
 
A lot less vulnerable, ROFL, I knew someone who had underfloor heating laid, then wifey had something fitted, chippy drilled the floor, killed the underfloor heating.:D

What are exactly intending to do with this place, just underfloor heating, or major work.

New kitchen, a few changes to the bathroom and new carpet. The radiators are very dated and so I'm looking at putting underfloor heating in. I much prefer that. Won't be drilling holes but don't want a chair leg to damage it.
 
I have done a bit more research on this. I think I need roughly 70mm floor insulation to comply with the regs. That will mean a lot of changes to skirting boards and doors. Need to think about this more before I commit.
 
I was under the impression it had to comply with part L. If so then it would cause me problems when I sell it if doesn't comply. Is compliance a requirement?
 
This is good news. :) I will see how much insulation I can squeeze in with minimal alteration to the doors. I will probably have to run the insulation through the entire flat or subtly drop taper it down in the hallway.
 
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Will do. Thanks for that info. Extremely useful.

I'm looking at aerogel blanket as an insulator below the mat. I have experience of aerogel through work and the blanket form seems to be used now for underfloor insulation.
 
Read a piece in one of my trade mags last year about aerogel insulation sheet & it's uses including underfloor heating.

That's good to know. I'm going to see how much it will cost. Initial impression is it is not the cheapest material but I know it is exceptional as an insulator.
 
As a slight thread hikack. We have a pretty small bathroom and my wife wants to replace the tiles in the floor Maybe 3m square at most.

At the same time she wants to add some underfloor heating. Are the strips pretty thin for the underfloor heating or will it be a bit of a ballache to do and having to raise the height of pipes for the toilet/sink etc to accomodate the extra floor height?

I think the mat itself tends to be very thin but you need insulation below it and some other layers above. The insulation alone will add 6 mm at minimum thickness. More will improve the insulation and minimise heat loss below the floor.
 
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