Andehh

Your very last picture, I would masking tape it off and then apply a very thick black bead along the bottom.

I know how it feels OP, I laboured over every bit of insulating detail for our place until our 2.4 x 7m sliding doors were installed (I was abroad with work). They removed insulation from cavity and back filled with solid concrete and sat the flush doors on them (from what I can tell). The installers refused any other installation method or approach due to our big, heavy and expensive the doors were, but it has left me a massive cold bridge which can be felt 1 foot into the room. Not sure id have accepted the risk of forcing them to do it differently, but I'm pretty sure mitigations could have been found for some if it (between them and builder). As the doors are nigh on fully flush inside and outside, nothing I can do about it. You can't win them all. (edit: also be wary of knock on implications, fix one problem may create others, and adding flex or tweaking installed doors may create other issues)

I think they do, you lose flow rate I think! I'm not an expert, but you can't beat seperate hot and cold taps on their own, but then have the faffage of adjusting temperature. Fwiw the aqualiser customer support is outstanding.

Just as a care point, from a total layepersons point of view those slates look neat, lined up and normal. You'd need to explain and evidence what's wrong with them.

We opted for big sliders, as 85%of the time it's all closed up, so maximum glass views. Lot less to go wrong as well!

Time for a new roofer, or start resolving yourself I’m afraid. Part of self building is knowing you get good trades, and (expletive deleted)ing shit hole bastard crooked ones (delete as required). We got lucky in having so many good ones... But I would piss on the electrician if he was on fire.

It's a strong look for sure... Based on zero experience at all, have you looked at external roller blinds, and squaring off the windows at the top?

MIL had a boiler pack up on her, 10 year old boiler. Blocked heat exchanger, likely caused by British gas not doing a power flush when they replaced it She paid £3000 for a new boiler and full power flush, from a local chap, last week... Must be an easy 25+ rads in her house. Prob £500-800 I'd guess for the flush? Made a massive difference to the heating of the property.

Been in for 2.5 years, every heavy rain has me walking around staring at the ceilings.... 🙃

Makes sense to me! That'd be my approach to it I think.

Wait, what!?

Have you spoken to any of your neighbours? Do they have the same setup?

We wanted and got black inside and out, much prefer I the contrast vs white, and how it 'picture frames' the view outside.

Am easy Internal paint job for a magic man type mobile painter.....and you'll be better off for it without the risk of wet wood from condensation. We went through similar, wanted one large single pane of glass and some bastard stuck central mullion in them all... Was devastated for weeks, but on the survey paperwork it had been added and builder had missed it. Builder paid for whole new windows in the kitchen where the mullion was in your face, and was apologetic and mee and we accepted the rest. We just ducked it up, and 2 years later it's not cross my mind for weeks. We could have gone to war with the builder, but whichever way you cut it... We'd have ended up paying one way it another.

Damn, and I just bought four of them today! The tuya and smart life ecosystem is pretty good for device range to be fair... Software is a bit buggy and Chinesey though.