Dave Jones

pipe size also dictated by flow rate and temp. Can be bad for efficiency to over/under size.

take several close up photo's in good light and take them to your nearest merchant, trav, jewson etc they have access to brick matching service for free which will get you a decent match and also ones that are actually available.

crikey sounds awesome. can you rig up a smallish pump into a a 3 port valve connected to heating and your hot water so you can have both ? Small central heating pump ? Just have to sort out if its got any gremlins in iut that will furr up your pipework i guess ? Basically treat it as a free ASHP just missing a pump.

drop it into the sewer, helps keep the pipes clean.

means no poles or legs in the opening so its clear. scaffs love to leave their poles long and shove them through openings to save cutting them.

doesnt look structural at 900 centres and no double studs, no noggins etc. is it a legoland house ? whats above it, what is sitting on top of the top plate can you post a close up

grp trays every time.

unless you owe them a substantial sum that will motivate them to return, little to no chance of having them back. Are you qualified to manage the build, do you know what you should be looking for etc ? Whilst it saves money may not be best decision. Did you have a contract in place ? We all know to go legal is mega bucks, no certain outcome and takes an age.

make sure to copy in the planning officer its their job to liaise with statutory consultees.

i have the comfopost, its crap. honestly dont bother. for the price of it you can get a lot of fancoils which do actually work.

correct, should be at a min doubled up studs under it. i'd want written confirmation from the joist supplier that the builders 'method' of fixing the 2 cut halfs is correct. NHBC state multiple studs to be used on load bearing walls. https://nhbc-standards.co.uk/6-superstructure-excluding-roofs/6-3-internal-walls/6-3-5-load-bearing-timber-walls/#:~:text=individual studs%2C rails and head,a maximum of 600mm centres I'd pause and get an SE in, deduct his cost from builder retention, and look over the lot before anything else is covered up.

how many days to do the job ? How many of them ? You have a company, buy the materials yourself and reclaim the vat if its a business expense ?

get your husband to have a look, its pretty straighforward..

make sure its ventilated. Warm roof much easier to detail but you need the build height which is what most people struggle with.

do your own water calcs, free http://wrcpartgcalculator.co.uk/ fan test your air test guy will do at same time as blower door test.

you'll be in good company with architects then. Big difference between theory and practice.

you want 100mm centres max for low flow. Kick this lot into touch and do it yourself/sub in the trades. You will get a superior setup for half the cost.

speed does not exist in our council thats for sure.

our local council don't even validate any application in under 13 weeks lol

so you built the corner wrong. the top plates need to be continuous and not floating in the air, BCO should fail it as its structurally not safe. Google California corner.... Whats with the osb not cut or fixed square?

the value an architect provides is the design. that's it. Everything else is ancillary which anyone can do.

you need contract works insurance, £2-5k.

you need the 25mm pir the full perimeter, can include against the marmox but not needed.

£5k and barter from there.