TonyT

The slab reinforcement makes a great earth conductor, you used to have to seek the structural engineers approval but think that’s dropped from the 18th. The problem is the connection needs to be accessible for inspection, in the past, we used rebar shaped to go outwith the foundation and then bring the rebar into an earth connection chamber.. brazing used to be an option but again accessible is the requirement for future testing. look at the furse website for more info

You spend all the money on fancy sockets and switches and use fast fix boxes😩 I dislike them with flat plate accessories and the fact you rely on a little bit of plasterboard holding them In. metal boxes on dwangs/noggins for me.

You can add sand to the top soil to improve drainage….

Looks good so far. No reason why the finished article won’t look good either. at least he’s giving it a go

Pea shingle

Can’t you dig the soil away from the wall? if not can’t you dig a French drain and install perforated pipe to get the water away from the house? And reinstall the soil?

If you can ditch the combi go for the system boiler. immersion back up in case the gas goes off, what’s not to like.

https://mcdonaldwaterstorage.com/wp-content/uploads/2020/11/POWERFlow-Installation-Manual-Iss-3.1.pdf

Drain at both locations?

I use wet and forget for green build up on paths etc. I think the brick acid would be a better shout

Can’t recall. It’s my mates house, I’m just helping with the M&E design…

Internally, building a steel box frame to take the loads of the new level and slap throughs for more open plan living…

I just wrapped the electrical box with tescon tape prior to fitting the boxes then where the cable and screw penetrated box sealed with clear silicone.

Get some 3x2 lay 2 flat with the appropriate gap you require and make partitions day 12 “ high screw to existing trusses and flooring screwed to top

Helping out on one now, not a terrace but Victorian property none the less, taking the roof off adding another floor, putting roof back on. New steel frame back to ground level is taking the weight of the new level.

I think I was using IN4007 when my sae envelopes from cricklewood electronics arrived after a long wait, those were the days waiting to see if the postman had delivered when I came back from school…

Battery management system would be my choice rather than a diode

You paid for the drawing and it would be reasonable that you would use it to obtain any information relating to your build. I wouldn’t worry about this, plenty to worry about later when you are building😀

Don’t block the air bricks, they are required to keep your existing timber floor in good condition. ducts can be installed to extend the airflow to the new out walls in the extension

Power cut isn’t a surge, so your call, if fitting a new consumer unit I would install it definitely, that unit only fits a Hager board so you have to watch if you have space in the existing that it’s not type tested for other manufacturers equipment

Undercut doors help ventilation if that’s desired….

Can’t comment on hardboard, but did this with 6mm ply. it was cut with a utility knife and nailed with ring shank nails.

Yes you get offset quadrants too, longer on one side, I have a Matki one no issues 17 years on…

Check out blacksmiths etc for brass sheet mine supplied one to replace a damaged threshold strip on a Victorian front door entrance

What happens when the screed is poured if there is no sheet material/slip membrane? collect under the joins?