TonyT

You could get 100 different answers for this question, so only you know what’s right, discuss with your sparky and get what you want.

You could have the ASHP, and just have flow and return tails blanked off at the house where the services will pop through to the extension.

Get the form from the DNO for your area. some are only interested in larger loads/ large motor/frequent starting loads. forget about lighting and power it’s negligible

My opinion then is for the size of property and that you want to go for 3 phase would be to go for the 60amp supply

Do you have gas heating? plans for EV Charger? plans for ASHP? Plans for PV? what size of house m2 single or three phase?

A few greenhouse tubular heaters would be good

Expanding foam via a foam gun to give a controllable bead. silver tape over all the joins and joists.

Angle grinder- use a hoover dust problem sorted. why waste expensive resin? Mortar will be fine

Get a humidity meter taped to the slab to see the RH of the slab. We used one with a yellow Tupperware type container that the normal humidity sensor slots into to read ground readings.

You can duct them too, and have a large unit in the loft space with insulated ducts to rooms, so doesn’t need to be the traditional mini wall mounted split system.

Just use a rotary isolator swa one end, T&E the other side. Handy point of isolation, Henley blocks aren’t suitable unless it’s double insulated conductors

Should you have pipework and cables in a chimney?

Why did the architect specify block, there must have been a reason? the builder likes timber as it’s easier, but it could have been block for other reasons, thermal, sound, carrying joists above….

Yes it can cause a blockage

Trades are probably that busy, see that the job will be a pain and just walk away, no fun in putting cowboy installations right. as all you seem to do is uncover more disasters and be the bearer of bad news regarding other trades poor work….

As so then to quote the guidance where they are getting their info from, usually works in stopping people quoting rule of thumb guidance or local working practice.

I would have had the fridge feed connected at the sink so the joint was accessible- you are just giving yourself future grief!

Looks like a new build living room to me- One of the big don’t care builders?

Or getting deeper worktops and cutting them down

Quote. MCS installation guide. ’Because PV array cables almost exclusively rely on double or reinforced insulation as their means of shock protection they should not be buried in walls or otherwise hidden in the building structure as mechanical damage would be very difficult to detect and may lead to increase instances of shock and fire risk. Where this cannot be avoided conductors should be suitably protected from mechanical damage, suitable methods may include the use of metallic trunking or conduit or the use of steel wire armoured cable in accordance with BS 7671’

Keep the heavy fire door for the toilet/utility, it will help keep the noises in the room where are generated

See what battery voltage they all operate from and try and decide on a dc solution.

You could say that about any cable though, but running it in SWA, in safe zones protecting cables at timber holes, adding safe plates over cabling will all help, totally agree about the photos for evidence.

4 or 6mm 2 core swa. Wrap the external cable in amalgamating tape and leave clipped to wall so it’s not damaging roof.( or gland it into a plastic box) leave plenty at either end to allow for a neat termination.

That flange piece could end up looking good, just got to have a bit of artistic flare. my mate made this, my wife saw it ( I’m not on social media) and she bought it it was a gas bottle