Andeh

Most of our main rooms are 4m high, MVHR does the job fine at that height.

We have softened in the garage for washing the cars (inspired ) then everywhere else except for kitchen, utility near bedrooms (fill up water water bottles) and outside taps.

Went through simular with our builder's sparky... Cost us over £10k in overcharges, bullshit and inflated costs. Didn't realise until his 'late invoices' turned up, and by then it was too late. I know your pain, but if it's any consolation it's a memory from 12 months ago and one you do get over! If you're going through hell.... Keep going! There's an end to it.

If that's the garden room.... What's the house look like!? I'm looking forward to my garden room, as a converted shed! 😆

ASHP, UFH, 4kw solar array for a minimum. Don't bother with gas. Wire for a battery, but the economics don't make sense to assume it in IMO, just have it as an option further down the line. Yes for 3PH, to enable multiple vehicle charging (ie 2 in garage and one outside for visitors). Invest in insulation and air tightness to pragmatic degrees, there is a law of diminishing returns. Spend the rest on hard wiring and future proofing options.

Yep, as long as you have a slight fall and good water management/DPC you'll be OK. Can seal the grout for extra measure but we havnt bothered to do so yet.

Yes, whole thing to a fall via the slab, though for your area. I still think tile it with a small fall, and make a feature out of it... Especially if you have two doors there as well!.. Its not like you'll use the space for anything else or be able to grow anything there.

We have a 20mm tiled outside patio, and laid a lot for the concrete slab to make it work!!! Tiles don't get slippy, though never had snow on them so can't comment for that situation. I'd just tile over the top of it.

I'd opt for closer spacing to speed up heating and run a lower temperature!!

I got a replacement PCB from vent axia, after some random uncontrolled boosts. Their tech help were pretty user friendly. It's plug and play and only took 15mins to replace, just label/photo the before you disconnect and not all the plugs are pokey yoke. Label/colour coordinate to be safe!

Can't comment on inhibitor but pleased to hear pipes have been solved. Average house has dozens and dozens and dozens of pipe joints without issue, put this behind you now and crack on!

Give your local building control office a call, and ask them to come out and inspect and advise. Most of them are a helpful bunch. I bet the developer self certified and dropped the ball on landscape here. Even gravel will get bunged up with debris and allow damp to breach, it's a crappy job to keep it "clean".

Buy the cleaner that goes with it. I have a love/hate relationship with expanding foam!

Theory works I think, I would keep a few bricks helping hold that PIR in place just as a pure belt and braces approach.

Can you really hear anything from them at 2km away?? I've visited a few wind farms and they are loud when stood directly underneath on a windy day... But 2km!? Definitely never found the noise intrusive carrying out business around the wind farm itself. Compared to typical road noise, wind noise in your own property, a MVHR circulating air etc etc...... I really thinks it's worrying for worries sake. I think they are incredibly graceful thing,and each one a middle finger to OPEC, Russia, etc! Edit, A14 view I was referring to, as you drive up over the hill and see them in the field in front! Really cool.

I'd love wind turbines a couple of kms away, I think they're amazing. That view driving up the a14 near corby.... Gorgeous!

I am sorry OP, this (expletive deleted)ing game can be a shitter can't it!!!

We have SMART aluminium windows and front door, not best performance on paper, but that's aluminium for you. They looks good. Our (expletive deleted)ing surveyor put then down as the wrong design though, which wasn't realised until they arrived, I'm still mildly pissed off about it, but oh the joys of self build and the quirks of it....!

You might be hitting your limits here, 40mm isn't much insulation, and that is cheap stuff laid there. UFH pipes are pretty crudely laid. 22 degrees in a hallway would make me believe rest of house is probably warmer then that, esp upstairs. Might need to run heating a couple hours longer during very cold periods Replace laminate for tiles might get you an extra degree or two more. Are you able to upgrade insulation anywhere else? Loft? Draft proving etc? At the end of the day heat in vs heat out is a limit every house has at some eventual point, less insulation lowers that point.

It's trickier as the noise would be a lower frequency dull drumming! Like I said doesn't bother us, and I am pretty twitchy about sound..... The water dripping off the wall onto the window cills. .. That annoys me!!! (but I get over it)

Sedum would make a massive difference as it would cushion the rain dramatically. Weight and cost would be a headache though. We have a warm roof, 150mm PIR and a wood deck.... Can't say it's a biggie. You do hear heavy rain, but that's the Named storms everyone hears! Wind is louder then expected, but i think as part of the room has solar panels stood 150mm up off the roof, so it's probably the wind ripping through them. Not sure what noise you're worried about if I'm honest! Hearing the rain falling is no different to it blowing against a window which you'll never class as an irritant!

We knocked the building down the second bats were mentioned, don't need planning for that! We had a full ecology report done which said NO BATS, but planning warned they'd want a bat survey anyway, due to a planned october/November start of construction and confidence we would get planning approved, we pulled the demolition forwards, then a week later sent a very apologetic letter back to them. There were a few grave warnings on fines and penalties, but the risk of delay and costs made the decision easy. It helped that our new build was broadly speaking reusing the existing footprint (project planned as extension, but swapped to a full rebuild) so had they forced a rebuild we'd have made it work. We did have a real fight over trees, had a full tree survey which stated our garden was already over subscribed with trees. Planning wanted a full tree replanting plan, for the 4 small, low value, excessively aged trees. Took several weeks pushing back on it. An hour with a chain saw pre project, and those trees would never have existed had I known the headache they caused....

You guys are going to shit yourselves when you realise the impact on insulation when you open your front door on a cold or windy day!! 😂

Like I said, if you truly were worrying about it a moisture meter poked through the carpet would confirm if you have a leak there, that and obviously a registered pressure drop on system. If a joint was to fail eventually, it's only a days worth of DIY to fix it all and relay a screed there.

We've had compression fittings last fine. Reality is, you'd detect with a damp meter through the carpet if an issue was suspected. Carpet lift and refit no issue, fix, refit. ... Few £100 and days work should worse case happen. Worse shit happens. Average house probably has several dozen pipe joints all over the place! Get them rejointed, pressurise over a weekend to ensure pressure is fine... Forget and move on!!!