Underfloor heating

[Ormond]

Looking for experience in underfloor heating....currently building an extension off the kitchen, the kitchen floor needs sorting anyway. Total floor area 60m2...was thinking underfloor heating in the whole area. Rest of the houses is oil central heated. What I'm waiting to know is running costs really....how often would the boiler be running , I'm guessing you leave it on low all the time in winter. Any guidance would be appreciated

 

[the-mad-welder]

@Adeptandy

 

[Speedstar]

Looking for experience in underfloor heating....currently building an extension off the kitchen, the kitchen floor needs sorting anyway. Total floor area 60m2...was thinking underfloor heating in the whole area. Rest of the houses is oil central heated. What I'm waiting to know is running costs really....how often would the boiler be running , I'm guessing you leave it on low all the time in winter. Any guidance would be appreciated

Best there is , get that slab of concrete warm & it takes next door to no heat to keep it that way with lots of insulation under it & in the walls

 

[br jones]

Looking for experience in underfloor heating....currently building an extension off the kitchen, the kitchen floor needs sorting anyway. Total floor area 60m2...was thinking underfloor heating in the whole area. Rest of the houses is oil central heated. What I'm waiting to know is running costs really....how often would the boiler be running , I'm guessing you leave it on low all the time in winter. Any guidance would be appreciated

Underfloor every time ,no loss of wall space ,a much better consistant heat ,cheaper to run ,especially in a extension new build ,rads upstairs.also helps if a floscreed type product is used,

 

[S J H]

I put water underfloor in downstairs, just radiators upstairs.

I would just say to plan the routes and know where kitchen cupboards will go. Ours was a bit of a rush, and I thought it would just spread through the slab and tiles to be an even heat, but you can feel where the extra pipes run back to the manifold.

 

[Timbo]

Don't skimp on insulation under the floor, I think regs say 100mm, go for 150mm at least.



Don't do a concrete biscuit - it takes too long to respond.
DO a 50-70mm screed instead.

Don't do a back and forth, have concentric rings of pipe.

Don't skimp on cheap controls. Use active thermostats, and have the manifold temp and balance set properly.

Yes it needs to be wired such that its able to call for heat 24/7.

Would I recommend UFH over rads - by about 1000% yes

 

[Ramrod]

Just recently renovated whole property, radiators pipes all out, installed hot water UFH throughout.
To early to know running costs but a heads up to what's available, looked at several systems then found these people, whole property (185m2) installed in 3 days.
No digging, No dust, no water, no moving skirting or doors, brilliant.

Videos | JK floorheating

jk-gb.com

 

[Adeptandy]

I've put mine under the kitchen cupboards, stops the cold spots behind the cupboards and damp forming

 

[Adeptandy]

I've done 1 where a radiator was removed and a room built on the side of the house ( exixting rad now the door ) you'll need something like this https://underfloorparts.co.uk/produ...on-underfloor-heating-manifold-upm3-pump-set/ to pump the floor loop and I'd wire it through a room stat specific to that room.

 

[Ormond]

Thanks for your replies so far....in the new extension it'll be 200mm over block and beam floor...so that's grand, only problem with the kitchen is at the moment it's a concrete slab, then 50mm kingspan with a floating floor on top. So all the flooring and insulation is to come up but doesn't leave me very scope for insulation under the screed. What's my best options...i don't want to take up the slab as I believe it's thick! The floor in the kitchen needs re done as its all over the place with movement. So when the floor is up to temp...and it's just ticking over how does the boiler cycle....small amounts after or a big burst every few hours.

 

[Adeptandy]

https://www.wundatrade.co.uk/shop/h...-ultimate-single-zone-underfloor-heating-kit/

This is an easy way of doing it on an existing floor, done our place with it, working well, can certainly get the place warm and saved a lot of work digging floors up. ( just don't buy there thermostats, they're cheap slow responsive rubbish )

 

[Hfd Cattle]

Have got underfloor heating downstairs and upstairs . I can't stand the sight of radiators hanging off a wall . It is brilliant . We still light the wood burner cos we like to have it lit so heating is turned off in the lounge . Our heating is run off ground source and costs virtually nothing to run .

 

[Ormond]

Also I believe tiles are the best option to transfer heat for the floor...out of interest how does a good laminate floor work with UFH?

 

[Ormond]

https://www.wundatrade.co.uk/shop/h...-ultimate-single-zone-underfloor-heating-kit/

This is an easy way of doing it on an existing floor, done our place with it, working well, can certainly get the place warm and saved a lot of work digging floors up. ( just don't buy there thermostats, they're cheap slow responsive rubbish )

That's what I'd be looking for....20mm would leave me with 50 mm screed to match in....hate having any change in levels in the floor if possible

 

[Clive]

had underfloor in my last house and the current one

there is no other way to heat a house once you have had it

insulate well, my wet system is cheap to run, the electric system (bathrooms and ensuites) is expensive however to run but ideal in those applications so a mix of wet and electric is ideal



think about multiple zones in a larger room and use a stat for every room - I can recommend Heatmiser Neo

 

[Ormond]

this is the extension part so don't want to mess up walls with low rads

 

[Headless chicken]

Due to a burst pipe we had to redo our house. We put electric underfloor in as we have a wind turbine and no central heating as such. I love it. Still working out how to keep the heat on all the time as it keeps dropping to 16. Other than that it’s awesome.

 

[Adeptandy]

Also I believe tiles are the best option to transfer heat for the floor...out of interest how does a good laminate floor work with UFH?

Tiles are good, all our floors are now tiled

 

[Deutzdx3]

Looking for experience in underfloor heating....currently building an extension off the kitchen, the kitchen floor needs sorting anyway. Total floor area 60m2...was thinking underfloor heating in the whole area. Rest of the houses is oil central heated. What I'm waiting to know is running costs really....how often would the boiler be running , I'm guessing you leave it on low all the time in winter. Any guidance would be appreciated

It works in a very different way to radiators as has probably already been said, you’re right in that you do leave it on at a pre set temp, the zone valves control each area differently. it’s not much good if you come home and are cold as it’ll take to long to warm up. Was toying with putting it in an similar size extension to what you have but not economical unless I install a second boiler as the remainder of the house is radiators. Great way of doing it if you’re starting from scratch with plenty of insulation.

 

[renewablejohn]

Put electric UFH in an ensuite and works really well with tiles and 50mm recticel foam direct over upstairs wooden floor.