Hodgey

Thanks for the replies, the BC Officer phoned and informs me I need to achieve a U value of 0.30 in the wall so Kingspan board will need to be used. The 12.5mm pink plaster board will propvide the minimum 30 min fire protection.

Thanks Andy, the garage is the same construction as the rest of the house, a cavity wall with stone on the outside and blocks on the inside with that usual 1 inch of polystyrene insulation stuck on the blocks, so I think I might be OK. I think I'm going to add a layer of this stuff over the studs, it's cheap and has surprisingly good insulation values. I'll do the garage doors as well. I've added the polystyrene boards into the calculation and it's now showing excellent thermal values but really poor moisture proofing, not sure if I should be worried about that as it's not an external wall? Hall_Farm_with_polyboards (2).pdf

By the way, still heard nothing from Octopus 😞

Hi all, hope someone can help. I'm part way through a partial garage conversion (two new rooms inside an integral garage with a small part of the garage and the garage door retained). The Building Control officer is happy with the floor and she has given me instructions for ensuring the new internal walls are sufficiently fireproofed. The walls are up, plastered and need completing on the garage side. I was hoping to crack on with the walls this weekend but I've been unable to clarify what the insulation requirements are (I suspect she might have gone away for the Xmas break). I've used the Ubakus calculator and my wall layers are looking like they will have a U value of 0.34. So far I've failed to find any info on insulation requirements for these internal walls and I'm a bit concerned I might fall short of reg's given there is an unheated garage on the other side. Does anyone know if there are minimum U values I must achieve on internal walls with an unheated garage on the other side? Also if anyone has any ideas to improve the U value I'd really appreciate your ideas on that. Location of new walls can be seen on attached Word doc and the construction from the inside through to the garage is as follows: @5mm plaster 12.5mm regular plasterboard 100mm Knauf Omnifit Roll 40 12.5mm pink fireproof plasterboard 18mm OSB3 board Cheers!!! Hall_FarmNewWallsU_Value.pdf NewInternalWalls.docx

I have PhilT, made an enquiry on their website about 5 weeks ago, all good for location etc. someone will be in touch soon etc. heard nothing. We're connection to the mains gas!

Update! ...Had three estimates for the ASHP which I can share for anyone else looking at this, two came in at £15k and one at nearly £22k. So, no heat pump for me as it's not viable. Gas it is then! Maybe I'll get a pump when the industry establishes itself better (in @ 10 years?).

Thanks very much Marvin you've given me some useful ideas there. I know nothing about MHVR so will find out more, sounds like it would be good for the bungalow as I understand they can suffer from condensation anyway. We were planning to get trickle vents in the new windows but maybe this could be a better alternative. We are replacing windows and doors so that will help the airtightness, the insulation seems to be pretty good and can be improved if necessary. The oil tank and boiler are coming out as they take up a 10' x 6' chunk of space that will become an office so I need to decide on its replacement asap. The E can wait.

Hi, I thought this might be a good place to piggy back my conundrum rather than starting a new thread. I'm replacing an oil based central heating system in a 1985 built bungalow with a 120m2 floor area and I'm struggling to decide between ASHP or getting mains gas + boiler. Connection to mains gas has been quoted at £3K, add on @ £3k - 3.5K for a decent boiler installed = £6.5k. So I'm considering ASHP as the future proof option plus the £5K BUS contribution might leave a few quid for a log burner to compensate in winter (I have read the complaints about ASHPs in winter, justifiable or not). We want to upgrade the existing single radiators anyway so that's not factored into costs. I'm really struggling to find any credible advice about ASHP's that isn't linked to recommeding installers so am feeling a bit dubious about the whole industry and thinking it might just be easier to connect to the gas, so I'd be really interested to hear from anyone what they would do in my situation. As we have just bought the house we have no historical data but the EPC says: Estimated energy used to heat this property Type of heating Estimated energy used Space heating 14288 kWh per year Water heating 2368 kWh per year