Underfloor Heating Query

M1k3H

M1k3H

M1k3H

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6 Jul 2010
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Hey all, looking for any information from people who have looked into or have fitted underfloor heating.

House is split into 2 zones (upstairs and downstairs) controlled via 2 Nest thermostats and 1 gas boiler. We want to remove the carpets downstairs and fit some sort of hard wood (and also change the flooring in kitchen and downstairs restroom), so thought about doing this at the same time.

Current thought is to only have underfloor heating downstairs, and use the existing gas boiler, so fitting water underfloor heating and maintaining the boiler input and thermostat.

At the moment, I haven't been able to find any companies that do underfloor heating in the South Wales area.

I am looking at whether this is feasible and some indicative costs. If it is too expensive (more than £5k) then we might choose to just remove the carpets and fit some flooring. The house downstairs is roughly 65m2.

Any input appreciated.
 
We put underfloor heating in the living room, but electric.

The room is large and north facing, 2 large windows and only has 1 small radiator, so pretty cold in the winter.

We got an electrician in to fit the under floor heating and put down most of the screeding (the electrician did a really good job to be fair considering putting a floor screed over isn't really their trade as such) then floor fitter for 1 final screen and carndean over.

The whole job was about £3000 with electrician bring about £1600 the rest the flooring guys. The flooring guys were expensive and ****** it up the first time, but it's sorted now.

The system works really well for what we need it for though.
 
Thanks for the input, that does seem expensive, £1,600 for one room of underfloor heating. And I imagine electric might be easier to fit as well.
 
What about something like thermaskirt https://www.discreteheat.com/? It's piping within skirting board. It can be wet or electrically heated.

My brother's house has it and he says it works really well. Unfortunately, it was in when he bought it so I can't tell you how much it cost but from a quick Google, the actual product seems relatively reasonable. £900 for 24m, including 4 internal corners and 2 external corners.
 
joey1211 said:
Electric UFH is going to cost a lot more to run than a wet system. Here is a good guide.

https://www.homebuilding.co.uk/advice/retrofit-underfloor-heating
Click to expand...

Thanks, the more I read about it the more complex it seems, and might not be something we are willing to fork out for.

DanTheMan said:
What about something like thermaskirt https://www.discreteheat.com/? It's piping within skirting board. It can be wet or electrically heated.

My brother's house has it and he says it works really well. Unfortunately, it was in when he bought it so I can't tell you how much it cost but from a quick Google, the actual product seems relatively reasonable. £900 for 24m, including 4 internal corners and 2 external corners.
Click to expand...

The reason behind underfloor heating is to heat the floor, as we will be going with hard flooring. Otherwise, might as well leave the existing radiators.
 
We are colllecting quotes as we are moving into a new build.

there is a company called JK floor heating, they use a machine to grind the required route for the pipes into the concrete floor meaning you don’t lose any height. The quoted us £2300 for the grinding, laying of pipe, manifold and pump and control systems for 3 zones.

this we will probably go for and then decide on the actual flooring when we have a clue what the decor’ will look like.

we need to look at getting the radiators removed and the manifold hooked up as another cost before we commit.

also waiting to hear back about the construction of our slab, not sure if there is insulation, concrete, cement screed etc...
 
stuman said:
We are colllecting quotes as we are moving into a new build.

there is a company called JK floor heating, they use a machine to grind the required route for the pipes into the concrete floor meaning you don’t lose any height. The quoted us £2300 for the grinding, laying of pipe, manifold and pump and control systems for 3 zones.

this we will probably go for and then decide on the actual flooring when we have a clue what the decor’ will look like.

we need to look at getting the radiators removed and the manifold hooked up as another cost before we commit.

also waiting to hear back about the construction of our slab, not sure if there is insulation, concrete, cement screed etc...
Click to expand...

Thanks mate, have sent them an email to request a quote. Their system looks ideal in terms of not losing any height.
 
Have a wet system in the extension in the concrete floor covered with tiles. Works really well. However unsure of specific costs as it was all lumped into the total build.
 
Looked into this for our place but for us financially unviable, huge disruption and being an older "leakier" property may not be ideal.

If you're timber suspended flooring two methods.
Below, if you have good crawl space or basement
Above, removal of floor boards.

Both methods are almost identical, a metal spreader plate is attached to the joists, wet pipe work is clipped in then insulation under the pipe (to simplify the process)
You'll also need space around the boiler to fit the underfloor heating manifold and blending valve, also remember UFH works best as a low and slow hearing process.
 
ash_scotland88 said:
Looked into this for our place but for us financially unviable, huge disruption and being an older "leakier" property may not be ideal.

If you're timber suspended flooring two methods.
Below, if you have good crawl space or basement
Above, removal of floor boards.

Both methods are almost identical, a metal spreader plate is attached to the joists, wet pipe work is clipped in then insulation under the pipe (to simplify the process)
You'll also need space around the boiler to fit the underfloor heating manifold and blending valve, also remember UFH works best as a low and slow hearing process.
Click to expand...

Thanks for the input.

Ours is a 'new' built (2015) so it is pretty air tight.

I'm not too clued up about floors, but lifting the carpet up I can see what looks like concrete.

The current valves that are used for the current zones are upstairs in the airing cupboard (next to the Nest Heatlinks), so assume they can be mounted in there.
 
chroniclard said:
Have a wet system in the extension in the concrete floor covered with tiles. Works really well. However unsure of specific costs as it was all lumped into the total build.
Click to expand...

That is the ideal scenario, tiles on top of UFH. Of course, if cost is too large to justify then we'll just put down some laminate flooring (tiles would be too cold with UFH) and call it a day.
 
JRJ said:
@M1k3H whereabouts in South Wales are you?

I've had all my wet underfloor kit from https://naturalgreenheat.co.uk/ Jessie is good as gold and knows his stuff, I fitted mine myself but they can supply and fit if required.
Click to expand...

Based in Newport. Thanks for the recommendation. I already asked for a quote from JK. If they come back with a reasonable price, I'll give them a ring to give us a quote too, otherwise no point getting more quotes if the first one is way off budget.

JK seems appealing in that they grind the pipe moulds into the existing concrete floor so you don't lose any height, so asked for a quote from there first.
 
Hi, how did you get on with the underfloor heating ? We are in the same situation as we want a wet underfloor heating system downstairs and leave the upstair as it is with radiators supplying the heat.
 
Day 1 of 2, today the pipework will be in, then I'll cap the pipes before the floor is levelled fully on friday.

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50mm slab thickness
I’ve backfilled the grooves with levelling compound as per JKs advice. Then levelling the whole floor tomorrow or over the weekend.

With our heat loss calc, 125mm pipe centres worked but we have large areas that are ~ 100mm centres so hopefully it’ll all help our SCOP
 
50mm slab on top of 100m insulation presumably?

How thick is the levelling compound?

Just asking as it's not your conventional type of installation, nothing wrong with that by the way
 
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