Conor

The SC, if it is the main one the supply, is the property of the water company and the point at which ownership normally changes. It's usually on the public side, close to the boundary. I'm not sure if the one your are describing is the main one, or how your supply is routed. Either way, make sure this one is accessible, if a meter were ever to be installed, it would be installed somewhere more accessible, in the public domain. Fyi a new meter is install is usually a small excavation, squeeze off of the existing supply, a new meter box, and a metre or so of new pipe, coupled to the existing pipe either side.

We looked in to the as well, told no by the manufacturer.

I have a friend who had this issue. They fitted a polycarbonte type roof to the underside of the joists, falling away from the house to a gutter. you'd want some sort of flashing / sill along the wall to direct water off the building.

Keep the upstand. The wood will be fine. I've 7mm laminate over a 50mm upstand and it's fine. I put a bead of silicone between the foam and boards, rather than underlay (as per the laminate instructions).

First question is, what is the weld doing?

I never had that issue, I put all three floors in to the one model and it gave me total heat demand at the top of the report. Make sure you get an ASHP that can easily do cooling, you're going to need it! You'll fing likes of May and September will be the difficult months and the sun is lower and will bypass your overhangs.

Create a service void along your ridge and have all the ducting run there. You only need 150mm or so. The. You run a single supply and extract duct up from your mvhr to manifolds housed in the void. keep it all withing insulated and airtight envelope.

He'll have to move it.

Ouch. You'll want to work on that glazing and reduce it. It's going to cost you a lot to run and potentially very uncomfortable in the summer. Has your architect done a full heat gain / loss model?

No, that's a reality I don't want to see 😭

Your first tport of call is to check your deeds and make sure these are not within an easemt / wayleave. Could also be part of the public sewer system if collecting form other properties. I see two beaches feeding in to the main line. Definitely right in tracking all those pipes to see what is what. From somebody that used to survey water network assets, chambers in people's lawns were the bane of my life. Please don't bury it 😭

Mine came with really short cables as the are designed to sit directly behind the panel. Installing them in the loft would be a real pain as you'd need more cabling (more voltage loss) and multiple penetrations through your roof membrane and airtight layer. Our ceiling is vaulted and only a 50mm service space, so once boarde dup you'd have to rip plasterboard off to get at them. PLUS they may not be properly ventilated and you might have overheating issues. Think that's enough reasons there not to do it

I found LoopCAD over estimated heat loss. Says ours was 9kW, reality closer to 5.5kW. maybe I got some setting wrong. I'd reduce spacing in larger areas to 150mm, 200mm in other areas. Flow temp of 32c. Should work well. LoopCAD assumes the UFH is the only heat source, and will give warnings if supplimentary heating is required.,

How long ago was this built?

Water will be coming through the tiles, down and out through the wall. What's behind the wall and under the patio? Are there drainage channels / slots int he wall?