SOS - The house is too cold and we have insulated before

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Hi All.

We live in a 4 bed 1930's semi which also happens to be a chalet, about 3yrs ago we decided the house was just too cold and especially with very young kids in the house, we had to do something about it.

2014 - We removed all carpet and changed to wood flooring.

2015 - Changed boiler to a 34 combi boiler from a system boiler, at least we got hot water on demand and heating efficiently.

2015 - Loft insulated to 270mm thickness

2015 - We were told by the energy company who did the loft that our walls were solid walls, hence they could not insulate it, however the first 1 meter from the foundation is a cavity brick wall, afterwards its solid 9" blocks. They said it wasnt efficient for them to just insulate 1m from the foundation upwards if they could not do the entire height of the wall which is not possible to do.

2015 - Dry linning to some walls, road facing and also the side. So this was done using timber frame with celotex 60mm in between the battens. Crucially, just plasterboard and skimmed on top, no insulated plaster board, so we have thermal bridging. Amazing how one sknowledge increases in 3 yrs.



Here are the problems we still face. The house is still so cold. Our only respite is from April til say Mid September, as our garden is south facing so at least the house is hot during these months, winter is always a nightmare, just checked energy use gas bill is about £100 a month and we are barely comfortable. There are a few things that I am looking at since we plan to extend in the next year.

I feel we are loosing heat from the floor, will insulating the floor make any difference. I read somewhere it can save £40 anually, this is not enough savings for me to warrant hte cost of doing the work. However, I want someone to tell me otherwise. The fact that the wood floor is on top of floor boards, I feel heat escapes from there easily as you have the gaps. What is hte most effective way to insulate a floor ?

The internal drywall insulation, am i right that if one uses a 25mm insulation ontop of a plaster board, this will be more efective. If this were to be done, will it still be necessary to insulate the wall from the outside or how effective will this be ?

External insulation - Due to the nature of the works we are doing, it presents an opportunity to insulate the walls from outside also.

Our kitchen - Almost feels like being outside, we know it the biggest heat looser, solid construction, with a hip to gable roof. The kitchen feels like it was added to the house at the rear, there is no loft insulation as one cant get to it, the spot lights feels like air conditioning units, we are very well aware of it, however as we plan to extend, it will be knocked down and
rebuilt as part of the extension. I just thought I had mention this.
 
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Windows?
Draughts?

£100 per month is not so bad for a 1930's 4 bed house.
Size of family?
Gas supplier/plan?
Is that year round, or just winter months?
 
Windows feel draughty atimes, but i am not sure. When i am sat in the 4th bedroom which is the study downstairs, i feel a bit of little breeze coming in. The windows, some are old and some were changed before we moved in, however what can go wrong with a window that would not be glaringly visible ?

The area where i feel draight is the bay window, which we insulated from inside, so it just confuses me. it could also well be the bay window causing leaks.
I change plans every year, so i am on top of that. winter months is almost £100 on gas alone. Size of family is 5, 3 kids & 2 adults.
 
Windows feel draughty atimes, but i am not sure. When i am sat in the 4th bedroom which is the study downstairs, i feel a bit of little breeze coming in. The windows, some are old and some were changed before we moved in, however what can go wrong with a window that would not be glaringly visible ?
Double glazing?

The area where i feel draight is the bay window, which we insulated from inside, so it just confuses me. it could also well be the bay window causing leaks.
I would suggest that double-glazing and addressing the draughts is your next concern.

I change plans every year, so i am on top of that. winter months is almost £100 on gas alone. Size of family is 5, 3 kids & 2 adults.
IMO, that's not bad, considering the building and the size of family.
 
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Does it get warm if you turn the heating up?
The thermal bridging from the battens where you have insulated with 60mm celotex will not have made a huge difference. If those rooms still feel too cold you need to investigate improving the windows or increasing the heating.
External wall insulation is something you could consider. Talk to your neighbour as it would be best to do the whole building at the same time, to avoid odd-looking joins.
Putting back the carpet will make it feel warmer if you tend to walk around in bare feet or socks.
 
Can you expand on your description of 'chalet' - does it have sloping ceilings upstairs, and if so do you know the thickness of the joists in theae areas and what's been done to insulate them so far?
 
put aside the amount of your monthly payments for the moment.

Looking at your actual (not estimated) meter readings, how much gas do you use per year?

Over the last month (or whatever recent period you can check) how much gas are you using, on average, per day? For example in winter I typically use 6 or 7 cubic metres per day in December/January/February, depending on mild spells and cold spells.

This will tell us how much heat you are putting into your house.
 
Yes we feel the warmth when the heater is on. However give it an hour once house is on 23 deg, on a cold night the heat just evaporates.

We are doing a major extension next year. It's huge and it's the last one. So I want to have an idea of what I can do and pen it all down now.



Does it get warm if you turn the heating up?
The thermal bridging from the battens where you have insulated with 60mm celotex will not have made a huge difference. If those rooms still feel too cold you need to investigate improving the windows or increasing the heating.
External wall insulation is something you could consider. Talk to your neighbour as it would be best to do the whole building at the same time, to avoid odd-looking joins.
Putting back the carpet will make it feel warmer if you tend to walk around in bare feet or socks.
 
Can you expand on your description of 'chalet' - does it have sloping ceilings upstairs, and if so do you know the thickness of the joists in theae areas and what's been done to insulate them so far?

Yes roof slants upstairs. They 6 by 2 joists and I put celotex in between the slanting bit 4 yrs ago.

Of course it would have bridging issues as well because there is no .access to joists unless one takes off the roof tiles.
 
Took a reading before going to bed. I will do same today to get a good idea. I will reply tonight

put aside the amount of your monthly payments for the moment.

Looking at your actual (not estimated) meter readings, how much gas do you use per year?

Over the last month (or whatever recent period you can check) how much gas are you using, on average, per day? For example in winter I typically use 6 or 7 cubic metres per day in December/January/February, depending on mild spells and cold spells.

This will tell us how much heat you are putting into your house.
 
Took a reading before going to bed. I will do same today to get a good idea. I will reply tonight
One reading in any random 24 hour period is useless.
It all depends on activity within the house and weather outside, which you can appreciate, gives rise to many variables.
Don't forget, you gas is also heating your hot water.
 
have a look at your old gas bills (they will also be online) for any Actual, not Estimated, readings.

I take mine monthly.
 
Sure. I have the monthly readings. I thought you asked for recent daily reading. I will post that I'm a few hours when I'm home
 
If you have some readings, you can calculate the average daily use.

I do mine at the end of each month so I can easily see average daily cubic metres in January (about 7) and in July (about 0.5)
 
Yes we feel the warmth when the heater is on. However give it an hour once house is on 23 deg, on a cold night the heat just evaporates.

23 C is really warm, and your bills seem quite cheap. What are you expecting? Where did you live previously? Somewhere with a wamer climate perhaps, or maybe just a more modern house?

Because your insulation is inside there is not much thermal mass, so it will cool down relatively quickly - but also warm up quickly.
 

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