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- CommentAuthorTriassic
- CommentTimeAug 22nd 2012
I'm (fingers crossed) in the process of buying a 1940s vintage timber bungalow, which has no insulation at all and heating bills of around £3,000+ per year.
In the longer term (5-6 years) my aim is to replace it with something better, but in the short term what is the cheapest way of insulating the place (walls, suspended sub floor and roof)? -
- CommentAuthorJames Norton
- CommentTimeAug 22nd 2012
Bang per buck* as far as I recall is something like this:
- loft roll
- cavity roll
- mineral / glass fibre batts
- Blown cellulose**
- EPS
- PU / PIR
- XPS
- Sheepswool
- Aerogel
*R value per £ per sqm
** depends on amount
J -
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CommentAuthorfostertom
- CommentTimeAug 22nd 2012
Interesting you put blown cellulose so high up the bang list, above EPS even. How come?
I find blown cellulose almost prohibitive - an eco-luxury anyway, tho with rare combination of advantages - not only excellent sequestration, but also hygroscopic, leaves no untreated corners/joints/cracks, and therefore quite effectively airtight.
Blown glass fibre (spit) is cheaper. -
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- CommentAuthorJames Norton
- CommentTimeAug 22nd 2012
I'm sure on a whole house worth I was quoted about £5 per sqm per 100mm, note 'a whole house worth' and at a thickness of about 200mm ie you can squirt it in at one end and you don't need two holes every stud, if you actually wanted 100mm ie between studs its more expensive, about £8, and for smaller jobs obviously its more expensive so I suppose on reflection should perhaps drop down the list.
J -
- CommentAuthortony
- CommentTimeAug 22nd 2012
CERT insulation is free, and they fit it too! apply now! -
- CommentAuthorTriassic
- CommentTimeAug 22nd 2012
I thought CERT was only free if you were in receipt of benefits of some kind? -
- CommentAuthortony
- CommentTimeAug 22nd 2012
no -
- CommentAuthortony
- CommentTimeAug 22nd 2012
I got it for a property that I am a landlord of!
They are giving it away as fast as they can at the moment -
- CommentAuthorTriassic
- CommentTimeAug 23rd 2012
I assume all I would get is cheap and chearful rockwool under the free scheme? -
- CommentAuthorjamesingram
- CommentTimeAug 23rd 2012 edited
you can get graphite EPS for you cavities, and usually glass wool for lofts (check out Tesco or your energy supplier) I think CERT will be ending in October ish?? -
- CommentAuthortony
- CommentTimeAug 23rd 2012
31st -
- CommentAuthorTriassic
- CommentTimeAug 23rd 2012
So what replaces it in November? -
- CommentAuthorPeterStarck
- CommentTimeAug 23rd 2012
I'm living in a 1920/30s 4"x2" timber frame bungalow while building a replacement house in the garden. I had the walls and ceiling insulated with blown rockwool fibres and it has saved me nearly 1000l of oil a year. It has paid for itself easily over the last two years. Well worth doing. -
- CommentAuthorNick Parsons
- CommentTimeAug 23rd 2012
''So what replaces it in November? ''
Should be the Green Deal and the Energy Company Obligation (ECO). There's going to be a gap, though. -
- CommentAuthorTriassic
- CommentTimeAug 23rd 2012
I'm told that the Green Deal is a waste of time and few people will take it up as the customer has to pay all the costs and is loan based at any loan is 7.5%?
What is the Energy Company Obligation (ECO)? -
- CommentAuthorseanie
- CommentTimeAug 23rd 2012
The Green Deal looks like a train wreck waiting to happen. ECO is sort of a replacement for CERT, with an emphasis on solid wall insulation, HTT properties and vulnerable households. I'd expect the money available to be hoovered up by larger scale projects so it might not be mush help to individual householders. -
- CommentAuthorNick Parsons
- CommentTimeAug 23rd 2012 edited
Glossary: HTT = 'Hard to treat'
Seanie said: ''I'd expect the money available to be hoovered up by larger scale projects so it might not be mush help to individual householders. ''
I'd understood it differently, but until the definitive 'rules' are out we are all guessing.
My understanding was that the big GD providers would get allocations of ECO to apply (according to whatever formula) to solid wall or hard-to-treat properties alongside the (insufficient) GD money. My own example - solid walled detached. Likely EWI cost £25000. Absolute max savings probably £500 p.a., if the assessor fails to notice the IWI. £500 x max term of 25 yrs = £12500, and I have allowed nothiing for interest. Is the ECO going to stump up £12500+ because I have solid walls? Watch this space. -
- CommentAuthorSaint
- CommentTimeAug 23rd 2012 edited
Posted By: TriassicI thought CERT was only free if you were in receipt of benefits of some kind?
That's correct or if the recipient is over 70 -
- CommentAuthorSaint
- CommentTimeAug 24th 2012
Posted By: tony31st
31st December -
- CommentAuthorSaint
- CommentTimeAug 24th 2012
How about using insulation that can be reused in the next phase of the project.
That probably precludes most fibrous insulants but certainly some of the more robust rigid insulation boards can be used again providing you install them in a demountable fashion in the first place -
- CommentAuthorJames Norton
- CommentTimeAug 24th 2012
Demountable would normally invite thermal bypass, typically solved by liberal applications of squirty foam eliminating any demountability....
....however if cut short and gaps packed with glass wool...?
J
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