TonyT

Do a pasma course and use mobile scaffold?

Could you forget about the ply/osb and batten out say 600mm intervals ontop of the truss and then metal sheet that?

Just get the meter fitted by shell and then move to octopus, that’s exactly what I did

And who is going to find out? relax, open bottle of wine and forget about it

Plaster

Like NICEIC and NHBC and others…. Only interested in taking annual subscriptions, not good to fine members!

Probably a letter to him advising that you are withholding payment due to poor workmanship, variation from original agreement and damage to property. offer to let him complete works at a future date specified and the works checked by an independent third party this more than anything from stopping him taking you to court ( some/ poor installers have no shame) then when he doesn’t meet these agreed terms find someone reputable to carry our remedial works and issue new certificate

You could ask anyone to design anything and if the calculations came back as item x complies just, some may decide that’s fine go with that some may decide let’s go next size up. could be the same when sizing cable, a 6mm2 cable might comply ,borderline but leave no wiggle room, customer is paying for it so let’s go with 10mm2 covers the designer leaves a bit of wiggle room for future just incase things change when on site. I think you need to put this behind you and move on, still more challenges coming if you are managing to this detail, or invest the time finding a small builder with good skills and recommendations.

Have you paid him?

I’m for using the same materials that were originally used, so lime mortar for me.

Just like gas and electrical to get a certificate that ‘proves’ it safe. helpful for insurers, reselling etc

A3 drawings for me can the bothered with anything bigger. and I have laminated certain ones and pinned to the walls/ taped to glass for easy reference

Cause if you aren’t using hetas installer you can go down the self install route and get building control to sign off at appropriate fee. if you have don’t the bulk of the work as you say finishing it off properly shouldn’t be a problem

No worries👍

I know I was asking MrT Wales

Can the inverter handle the reduced start up voltage if you split the existing circuit into 2?

More pictures are required the only picture showing the switch looks questionable, and love the grey t&e clips on the flex. Another quality install!

Use a gshp and put the coils in the river. let the EPA argue about extraction (abstraction) as you aren’t pulling anything out the river!

In the commercial world, we use 1.5mm2 core mains flex, the audio snobs will advise it has to be oxygen free made by leprechaun’s at the end of a rainbow.

I would dig the 15m and have peace of mind and have the unit further from the house

Make sure the flooring is able to lift out

Get an asbestos survey carried out

28mm would be the next size up, mine is run in 28mm to supply boiler and range and then drops down to 22mm at each appliance

So it can modulate down to 1:17 so your only burning what you need so that’s good

Sorry Meant pipes and cables all really designed to be clipped to a surface/supported at regular intervals depending on the diameter/material in question. all round band is a good choice when a clip isn’t easy to fit