Roger440

And this is why prices wont come down. The status quo suits everyone involved, all printing money as fast as they can. The rest of your 3 monthly, near identical posts isnt really relavant, nothing will change unless some structural changes to the market are made. They are not likely (putting it mildly) to be made, so prices just keep going up. Prices wont come down unless some action to do so takes place. That will impact someones profit somewhere. So isnt going to happen. Indeed, Ed just ADDED £300 a year to everyones bills just 2 weeks ago. You clearly dont think so either, given your refusal to demonstrate the courage of your convictions. In the meantime, you can continue to discuss the same theoreticals over and over. Wont make a blind bit of difference. When serious changes are made to the market, that will be a great time to discuss.

Lots of words. Ignores my point entirely. When will my electricity prices go down? Odd you ignored my generous offer. I wonder why?

No it wont. Not in any meaningful timeframe. If you genuinely believe that, lets bet on it. 6 years from now, proceeds to charity of your choice. As for reform of levy and taxes, Ed just added £300 per household per year with his latest grant harvesting scheme. That will help!!!!

Good summary right there! And pretty reflective of a large chunk of society now. Net zero seems to have created a significant sized cult. No idea how it ends though..............................bankruptcy?

Thanks for all the info. As always, hard to know what to do. The cavity AND IWI gives a wall that meets current standard, which i hadnt thought was realistically achievable. Im more keen on heavily insulating the extension and do rather less in the old part which is 2 ft thick stone walls, so lots of unknowns and variables. Good news is, floor is concrete, albeit uninsulated (as far as i know, laid in 19080.) And yes the rainscreen will be ventilated. All pretty conventional.

Came very close to fitting 2 in my office and "clean room" in my workshop. Well, the propane filled ones, so no need the an F gas person. Sadly, my "electricity supply" issue means that ill need to go oil for that too. Lots of second hand boilers around at the moment for bugger all money. And easy to DIY. Which is a shame, because this would have been much simpler.

I know you dont want to, but id be talking to these guys for an "all in the box" solution. I found them very helpful when i was looking at an off grid property. At the very least it will give you an idea of whats possible and the costs. https://www.energy-solutions.co.uk/applications/off-grid/easygrid

Good point, missed that. Got those at work. Dont think id want them in my house though.

Thanks for the explanation. I see 2 issues preventing me here. One, i wouldnt have the first clue about how to manage or deal with the electronic/IT side of all that.. But probably more importantly, if it subsequently showed a problem, that would mean major rework to deal with it. Thats not something i can do. If i do something it has to be right first time. Paying for WUFI is yet more money not spent on actual upgrades. Its not about justfying it, you still have to have it. If it just ended at that report it wouldnt be so bad. But it doesnt. As i suspected, and you essentially confirm using a ubakus model isnt without risk. Which leaves doing nothing as the only "risk free" option. Which, im not keen on as the extension is really quite poor thermally, not helped by fronting into the prevailing wind. The old stone part of the house is far better in that regard. As regard joist ends, that something ive yet to establish what has been done. If its through to the cavity, that probably the end of cavity fill ideas.

Nothing much, aside from no insulation other than in the roof and ancient failed double glazing. I knew all that when i bought it though, so that was my choice. But it does have a relatively new, perfectly adequate oil system and keeps us nice and warm. Sure i "could" replace it with a heat pump, but the obvious blockers are cost (substantial) , woeful incoming electrical supply (60amp (has to run my workshop too)) , and probably more importantly, the unreliability of the incoming power supply, which is just what it is out here. If i go to an ASHP, im going to freeze in the event of another multi day power outage. Currently i can fire up the generator to keep the basics on including the heating. Id need a rather larger generator to keep a house with an ASHP running. Lets call that another £2k. Are you able to expand on how you got an ASHP system for £4k? SimonD in another thread, when i asked why ASHP's cost so much to fit showed his workings for a house just completed and it was £11k just for materials. So, id guess at least a £15k job. Thats a vast difference. As you can imagine, the payback at £15k is essentially never, as oil is at least as cheap, if not cheaper than an ASHP. Even at £4k it wont payback, but one might choose to do it anyway for future proofing.

If thats what other people are happy with then thats good for them. Ive lived like that, and have absolutely no desire to do so again. There plenty of opportunity not to live like that in the UK.

Not with the things i wanted i couldnt. Well not for this money. I guess i could have bought a small house on a normal street with a postage stamp garden and single garage that was super efficent. But then my life would be pointless. I would simply die of boredom. But, hey, one less person consuming resources.

Who do i vote for? Id like a warm cheap to run home. Problem is, to get that i have to spend out big. Bigger than makes any sense. I aquired a bigger oil tank instead so i can be more choosy when i buy my oil. And the old tank gets recyled as a tractor food tank.

This. Was no issue if i didnt do the cavity, but U value not as good, obviously. Regardless of what i do, there will probably be an additional rainscreen of Hardie plank or similar outside

But how would one monitor the effects if the dew point did actually move into the wall build up?