Energy costs make you look at things

[fred]

unless you have insulation the cold from the ground is going to sap it.

The more thermal mass (conc) you have above the insulation the cheaper it is to run.

For building regs its 100mm celotex or 150mm+ of eps. If it was my own place id put 500mm as its the best bang for the buck.

 

[6feetdown]

unless you have insulation the cold from the ground is going to sap it.

The more thermal mass (conc) you have above the insulation the cheaper it is to run.

For building regs its 100mm celotex or 150mm+ of eps. If it was my own place id put 500mm as its the best bang for the buck.

500mm insulation?

 

[V8Druid]

we use these guys for cheap kits

Plug-In Solar Self Install DIY Kits | Plug In Solar

Plug In Solar - Your DIY Solar Energy Solution

www.pluginsolar.co.uk

interesting website @fred

 

[fred]

500mm insulation?

the cost is minimal really and the payback continuous. 500 works brick, 2 x blocks + screed.

 

[V8Druid]

no.

This years FIT is 60.23 per kw/h. You also get paid 5.99p for exporting.

so the FIT has risen then ... 2012 was forty summat and declined to below 10p very quickly .... when did it start to climb again ?
just been googling and ...... " The FITs scheme closed to new applications on 31 March 2019 "
" When the Feed in Tariff finishes end of March, some of the excess electric generated by your solar energy array will inevitably go back to the grid. At the moment there's no mechanism to get paid for it. "

 

[Smiffy]

unless you have insulation the cold from the ground is going to sap it.

The more thermal mass (conc) you have above the insulation the cheaper it is to run.

For building regs its 100mm celotex or 150mm+ of eps. If it was my own place id put 500mm as its the best bang for the buck.

From experience not nearly as much as you would think as if that was the case our house would be more expensive to run than the neighbors as all houses are identical. But it's not despite how hot my wife keeps the house. All other houses on the street are on radiators.
The boards are foil backed to send heat upwards.

Definitely not inefficient enough to warrant digging the floors up especially on a house you intend to do up and move on quickly.

 

[Routy56]

and pointless unless you have a min of 100mm insulation under it.

It’s what we did with our conservatory UFH about 12 years ago - all plumbed in with our wet CH system by yours truly. Nice to walk about in the winter in yer socks
But we have wooden suspended floors in the rest of the house. I want to do the rest of the house but SWMBO says no

 

[GazCro]

They reckon beyond 150mm in a floor the benefit is miniscule and they only driver towards it is to satisfy building regs if you want bigger windows and need to gain every bit you can on saps calcs. Its funny you get places with 200mm in a floor and then 50mm insulated boards on the walls and 70mm in cavity doesn't take a genius to work out where the bigger gains are. The biggest advantage of proper ufloor screed and of the proper thickness is heat dissipation and an even floor temperature. If i were putting it in i would not use the usual manifold setup with pipework direct from boiler as this keeps boiler cycling all the time. Use boiler to heat a buffer tank with thermostat control and then run ufloor from tank via thermal blending valve. Its surprising how little water temp needs to be above desired room temp.

 

[Furniss]

We use wood for heat - wood is still reasonably available here and about 220€ a cord - we do about 2.5 cords a year average - there is a little Leccy wall heater in the kids room which is on a bit over winter otherwise no other heating... 1840 house with 60cm thick walls ... old technology but performs reasonably well I think.
I made a log splitter for compact tractor and used to buy 2m lengths and process it myself ,but times too precious nowadays and I buy it seasoned split in 50cm lengths.
Otherwise our electric bill is about 190€ a month average (im informed ) which includes little holiday cottage which is on electric wall heaters,I read that the government recently put a cap on EDF price rises and apparantly it costs them more to produce than they can charge at moment.

 

[Shovelhands]

It’s what we did with our conservatory UFH about 12 years ago - all plumbed in with our wet CH system by yours truly. Nice to walk about in the winter in yer socks
But we have wooden suspended floors in the rest of the house. I want to do the rest of the house but SWMBO says no

Just had all my timber floors out……

 

[GazCro]

It’s what we did with our conservatory UFH about 12 years ago - all plumbed in with our wet CH system by yours truly. Nice to walk about in the winter in yer socks
But we have wooden suspended floors in the rest of the house. I want to do the rest of the house but SWMBO says no

Imho underfloor heating becomes cheaper to run the bigger the area you heat with it especially if just zoned straight off boiler with boiler cycling etc the boiler is putting all the work in at one end for little output at the other in just one room.

 

[Furniss]

It’s what we did with our conservatory UFH about 12 years ago - all plumbed in with our wet CH system by yours truly. Nice to walk about in the winter in yer socks
But we have wooden suspended floors in the rest of the house. I want to do the rest of the house but SWMBO says no

Put your slippers on ffs its cheaper
I think we have all got a bit soft ... they used to put another layer on back in the day.

 

[Furniss]

Just had all my timber floors out……

Hope you put them through the Woodburner

 

[V8Druid]

We use wood for heat - wood is still reasonably available here and about 220€ a cord - we do about 2.5 cords a year average - there is a little Leccy wall heater in the kids room which is on a bit over winter otherwise no other heating... 1840 house with 60cm thick walls ... old technology but performs reasonably well I think.
I made a log splitter for compact tractor and used to buy 2m lengths and process it myself ,but times too precious nowadays and I buy it seasoned split in 50cm lengths.
Otherwise our electric bill is about 190€ a month average (im informed ) which includes little holiday cottage which is on electric wall heaters,I read that the government recently put a cap on EDF price rises and apparantly it costs them more to produce than they can charge at moment.

paid our leccy bill, end of last month ... 290 quid for the quarter ... fiver less than the previous year's same quarter ... and it's gone up through the last 12 months .... no leccy heating, but all leccy cooking, what the boiler needs to keep it functional and my consumption outside with me tools, etc. ....... we don't consider circa 25 quid a week dear TBH . Boiler uses circa 8-9 ltrs kero/day this time of year. We have the house at about 17.5-18C and the wood burner gets lit about 5.30 of an evening unless it's a real cold, wet day and we're indoors and feeling the need for (flames) it earlier ..... barn is very late 1600s, solid, thick walled, well insulated in the roof and a lot of it is dry lined, so could well be a lot worse ... have a few drafts that could do with sorting on windows, when the weather improves and this year we're gonna do ourselves a reminder list of what's what, or it'll get forgotten again , 'til the weather turns to tish. Could cost a lot more to be comfy, than it does

 

[V8Druid]

Just had all my timber floors out……

did they burn well

 

[Routy56]

Just had all my timber floors out……

I'd be really interested in what you are replacing them with and what system of UFH
Just don't tell Sharon what I am scheming

 

[Shovelhands]

did they burn well

Yes they did, was getting short of firewood and too tight to fill up the oil tank so the floors seemed like a logical choice for heat. Kept everyone warm and happy but Mrs and kids moaning now about the big step off the bottom of the stairs…..
Little do they know, the stairs are next….

 

[V8Druid]

Yes they did, was getting short of firewood and too tight to fill up the oil tank so the floors seemed like a logic choice for heat. Kept everyone warm and happy but Mrs and kids moaning now about the big step off the bottom of the stairs…..
Little do they know, the stairs are next….

followed by an Ali ladder to replace 'em

 

[bobthebuilder]

just doing a house now ,had solar fitted 5 weeks ago ish ,4370 fitted with i boost,
house has new floors insulated walls and roof,it will have a buffer tank ,air source and a small lpg gas boiler ,
reason for boiler the house is large in a proper cold spot ,with 4 bathrooms ,air source is terrible for heating water quickly

 

[bobthebuilder]

also a 3 year waiting list on a tesla powerwall