andy

I have an anthracite zinc standing seam roof (so black, gets hot as hell) and the build up from outside is zinc, underlay stainless steel clout nailed to 18mm plywood, 50mm battens open to eaves and venting at apex, fibreboard nailed to i-beams with 350mm of warmcell followed by 12.5mm foil-backed plasterboard and then plastered (not sprayed). This includes vaulted spaces and whilst we had a slight crack on the ends going towards ridge beam, I chipped it out and easifilled it to repair and painted and there's zero movement to date and no cracks. As others have said, sounds to me like a lack of (required) ventilation void and glass fibre is no substitue for PIR alas... get it rebuilt to spec.

I’m still sorting this but I’ve done cross batten at top of brick plinth height with a stainless steel mesh stapled to frame wrapping under counter battens and stapled to face of cross batten. Tongue and groove larch will get stainless steel screwed to the cross batten at some point in 2021… cladding will drop circa 20mm below bottom of cross batten is the current plan, maybe with a slight chamfered profile, who knows!

Yeah - Eddi it is then.

We drew up a spreadsheet, somewhat informed by (an utterly useless waste of money) QS.

Mulling either Eddi or Immersun on my 3 phase inverter install. Will be getting a Powerwall later this year but I think there's still value on getting one of these. Given I'm on net metering, do you happen to know if both Eddi or Immersun will understand this - I am pretty sure Eddi do?

I believe as long as it says secure on it, it's OK. I have this one: https://www.camax.co.uk/product/secure-sprint-211 And I'm using Octopus and they say as long as a SMETS1 meter has "Secure" on it, it is OK. It's submitting readings every 30 mins to them. https://octopus.energy/agile/new/

It’s not a SMETS2 one if that helps ? I’m still trying to get SSEN to take away my unrequired single phase overhead supply but we’ll get there… Don’t forget, all these connection and disconnection activities are zero VAT rated for new builds (inc. disconnection on demolish and rebuild) and they have no problem refunding you retrospectively. Andy’s top tip of the day!

For Tesla Model 3, look here: https://ev-database.uk/car/1321/Tesla-Model-3-Long-Range-Dual-Motor#charge-table You go from 7.4kW to 11kW, so 25 to 38mph. For Tesla Model S Plaid: https://ev-database.uk/car/1406/Tesla-Model-S-Plaidplus#charge-table You go from 7.4kW to 22kW, so 22 to 50mph. So for me, future proofing home charging and having PV and an ASHP plus no price uplift meant 3 phase the way to go. I even have a smart meter but that was a battle and a half to get...

Solvent where you can't access is what I did - it's so easy to use. Just make sure you know that the pipes for push-fit and solvent are a different size. Then where we have a sink or whatever it's standard McAlpine waste fittings which couples onto the solvent weld that's behind the wall.

Having finished mine off recently, I would definitely: 22mm hot and cold manifold. Isolated feed to all outlets from there - I went 22mm to 1 shower and bath and 15mm to everything else but that was cos I didn't have 10mm, probably makes sense to where flow not needed. Armaflex lagged everything - I used the self-sealing split stuff, really good but does need taping too where you go round corners. Probably overkill and took ages but hey, it's done now Continuous runs of Hep2O from manifold to outlet (or very close) - no way I would do anything different or use any other pipe. Absolute no brainer I feel here. Long 28mm runs to/from ASHP - due to circumstances these were needed but hell to work with, definitely design out if possible in future... Think that's the main bits from my recent adventures in plumbing.

At this point not, I don't see a use requirement for myself. The Q350 increases flow rate when it detects increased humidity (it's enough to boil a pan in the kitchen). There's a Python module here: https://github.com/michaelarnauts/comfoconnect That could be used to integrate if you wanted to. The reason I want to use that (eventually!) is to pull the stats into InfluxDB rather than control it per se.

Well technically of course they are fine but our new connection Southern Water insisted it had to be a brass stop cock, wouldn’t consider anything else.

I'm still in the process (adopting the MVP/aka agile approach to house building!) but I would say key things that worked for us have been the following: Manage it yourself - if you have the time and enthusiasum, then it's a good thing. If you are OCD about finished product you are after, it's a must. Where possible stick with single trade on site at a time - yes, it takes longer but it's so much easier to handle any decisions that will crop up Don't scrimp on the things you cannot change - fabric first And if you are doing the first one of managing it yourself, live with the fallout of no escape for a long time... Biggest challenge we've had was groundworks in the wet winter from hell last year on a sloping site - with aesthetic, time and money implications... doing it again I'd start groundworks more like March

Thanks, will see what I can find!

I think this is the approach I am going to go with @PeterStarck can I ask where you got the adaptors for for connecting this? I don't seem to be having any luck here working out what to get.

My reason for going 3 phase was two-fold: 1. Overall usage of the house may have exceeded 100A ultimately and sparky wasn't happy. 2. Future-proof for EV car charging and additional PV (already have 6.1kW so doubt I will add more now).

So I've had confirmation today that I am indeed on net metering and apparently that's the default that the Sprint 211 meters are set to. Now this is indeed good news but my last challenge is to see if I can get just 1 Tesla Powerwall 2 installed (instead of 3...!)... If I can then my plan is back on track as Tesla monitors usage across all 3 phases with CT clamps, where I am feeding back to the grid it draws more power on the phase it is connected to to top up for free. Powerwall only feeds and protects its phase for the house but that's OK.

I must admit to not being too clear on the exact bits here @PeterW myself. I didn't think both a HepVo and tundish were needed if the tundish has a self-closing membrane? Then I can just have both regen and overflow feeding in above the tundish?

I have the same plumbing I need to finish in my utility for softener and I am planning on putting one of these in: https://mcalpineplumbing.com/overflow-fittings/tun-dishes-non-return-valves/tun5-cl-tunvalve-straight-through-clear Or https://mcalpineplumbing.com/overflow-fittings/tun-dishes-non-return-valves/mactunc-tundish-self-closing-valve My understanding is that for regs compliance there has to be a break between the regen/overflow and drain which a tundish would give you. The bit I haven't worked out is how I "properly" secure the overflow and regen outflow into a pipe that feeds in above the tundish apart from doing similar to what you've done @Russdl This is work to be done in a few weeks for me, so good timing on question

Because the government are bowing to the selfish, short term demands of the building companies lobbying... and/or are benefiting themselves from this. Building regs should be forcing everything built now to be passive standard but alas I don’t see that happening anytime soon, just pathetic stunts like the recent green grants nonsense.... irks me somewhat you could say ?

MVHR (and PV IMO) are both no brainers if you are building a modern, well insulated and airtight house. I have a Zehnder Q350 unit and I can't speak highly enough of the unit - quiet, efficient and does what it says on the tin. Given your other choice is *shudder* trickle vents - I mean, come on!!!!

@Dan F That's what I was told by my supplier when I tried to order 1 Powerwall late last year. Apparently it's a new SSEN G99 regulations where they don't want the phases unbalanced but hey this might be the sort of thing where if you ask again you get a different answer... if you are told something different please do let me know and who you use as my preferred outcome is 1 x Powerwall. @Nickfromwales I have started looking at the DC battery options as I have a 3 phase SolarEdge system but have not opened that conversation yet as I think this might be a different SolarEdge inverter, not sure I can retrofit but as I said I've not looked yet. Downside of DC coupled is I'd need to put that in my comms room rather than in the garage that I can do for AC coupled Powerwall.

Hi Dan I had a 3 phase meter installed by Octopus last year - lots of challenges along the way and suffice to say I still have my old single phase supply as they mixed everything up... However, they don't seem to know about "net metering" so perhaps the key phrase here is "vector sum" instead? I am still not even on their outgoing tariff but hopefully will sort that soon. The other down side of 3 phase is if I wanted Tesla Powerwall now, I need one per phase, so SSEN now stipulate, I really cannot see how the maths there adds up, alas I have 6kW of PV, so I don't know how well 2kW/phase (minus active load) would charge the batteries - hell, on the bright side I'd never run out of battery capacity!

I have a home brew (by plumber) 22mm copper pipe loops for hot and cold with Hep2O 1/4 turn full bore valves for each feed, then a continuous Hep2O run to the target for each pipe (no joins in walls to hopefully avoid any future problems).

The only way it can be used and prevent birds getting in underneath, getting trapped and dying would be if you buried the entires perimeter which just isn't going to happen (and doesn't happen, thus making the stuff even worse). Plus if you do use it, it should be checked at least a couple of times a day to see if there are any birds trapped, so they can be freed. Alas I see this an an unneccesary and dangrous trend further impacting our already hard-pressed wildlife and I hope we see it banned soon.