Thorfun

Maybe something from a structural engineer would carry some weight?

probably not want you want to hear but as has been said above if you apply for demolish and rebuild you'll save VAT which on a 180m2 house at £2k/m2 is well over the £52k CIL. so for the worst case scenario if they do enforce the CIL then if you're looking for a silver lining it could actually save money in the long run as you'll save VAT.

wtaf!

congratulations! having recently received our I know what a great feeling it is.

i've used traps like these (but different make) in a few places (under the bath and sinks in the bathroom) and like them a lot.

good luck!

I'm pretty sure that you were the one who told me to grow a pair and solvent weld everything when I was going to use push fit as well 🤣.

I've been avoiding this thread up to now as I'm not sure I ever want to comment on @Pocster's strap-on but oh well..... I would've thought that if it the strap-on boss was welded previously then it won't come off, right?

Check with your BCO before you finalise a decision

full on punk rock band \m/ she can always goes outside and work on the landscaping.

that'll probably take you about 4yrs.

I'm satisfied that my proposed solution will muffle the sound enough for SWMBO to be happy. obviously when i'm jamming in the music room i won't care about noise in the rest of the house! 🤣 i think i like to overthink things...........a lot!

about half-way through your build that was

it's not about the stated sound reduction etc it's more about building a ceiling to a manufacturer specification so that if it fails then i have a certain recourse. i'm sure i could easily make something up and it'll work but i want it to be "certified" by the manufacturer so i have someone to shout at if it all goes wrong. 😉

an interesting point. i spoke to BG tech support a little while ago as i couldn't find anything in the WhiteBook for what i'm after. they said that they have some internal docs they can send so i submitted a form and am awaiting those docs. that should give me various solutions and i can decide which is the best way to go.

i agree but you never know! it's definitely worth asking the question as it's not really their cash to give away as the VAT you paid will be going to HMRC, right?

damn! that is quick. need to get my arse in gear and collate all my invoices. good luck with getting better receipts. afaik you can't claim the VAT back that contractors have charged when they shouldn't but i guess you can ask the contractor/company if they'll refund it. again, good luck!

that was quick! how long has that been since you submitted the forms?

Yes. Works fine. But it is a basement so the temperature doesn’t really fluctuate and we rarely have the heating on down there.

thanks for the tip @nod. i did another search through the BG website and found this image for a secondary dropped ceiling. so it seems that the FEA1 steel angle is screwed through the plasterboard into the MF5 channels above allowing you to to repeat the ceiling below. so this will double the cost of the MF materials but give me an unbroken ceiling to reduce noise transfer above. i think this is what i'll do as it also means i can fit, insulate and board the primary ceiling without worrying about running cables before hand.

I didn’t put the ufh pipes in the slab in the end. They’re in a 60mm Cemfloor screed on 25mm PIR on top of the slab.

I wonder if you even own those panels. anyway, I don't really care as I'm not interested in anything like that. I get 15p/kWh exported with Octopus which is more than I pay for my imported cheap electricity on Cosy.

how much do they offer for solar export per kWh?

Thank you. Will go through the white book again and have a look.

Ahh…..thank you! Now I know what @Russell griffiths was talking about. That makes sense and is very interesting. I could make the boxes 50mm deep and lay a 50mm layer of Rockwool around them in the void and then cover everything with another 100mm Rockwool. definitely food for thought.