dpmiller

Insulation is good. I like insulation. It even seems to be working... Overnight temperatures are dropping radically but the small amount of heat that the diverter is putting in during the day seems to be hanging around nicely. Drops consistently from 16 and a bit to 15 and a bit overnight. And while we're airtight there's not yet any insulation in the attic and the GF is a bare uninsulated subfloor so I think we're doing OK. Was given the loan of a plasterboard lifter so that'll make things slightly less difficult in the near future. Oh and got some company for the digger, a dog-rough but useable Thwaites 4000 dumper. Putt Puttt Putt.

Our guy was great. In UK parlance only an AT, but fully trained in NZ where they focus a lot more on the buildability and structural side of things apparently. Absolutely no pushing of his ideas onto us and a easy exchange of requirements and facts.

me too. there's around the same gap between the back of our (black) tiles as the under-felt ventilation gap. Dunno.

think it's much cooler under a panel outside?

nothing that I can see in the 17th? And if it's a non electrical reg I'd be intrigued considering the number of gas boilers that are fitted in loftspaces these days...

We've microinverters and I chose to hang them in the loft. Any loss of life is easily compensated for by ease of replacement.

I'll second the difficulty of working above the panels. Our roof was an absolute mare as we've panels crammed in around a dormer and with a valley each side. But yes, you can fling them up, poke the wires through a nearby felt overlap, and carry on...

The Kinetico units are a bit different, there's a clear cover ontop of the meterhead that you can easily unscrew to swap out a little metering disc underneath.

more toys installed. Acquired a Solar iBoost+ and while I don't have any water storage yet I did have the desire to hang on to what generation we do have. So plugged an 800W halogen heater in, to keep the cool at bay. Last night at 7pm? still a nice warmth. Pretty impressed. today at 9am. heater maxed out. What to do... Plug the kettle in. Well blow me, if the kettle hasn't gone the whole way to the boil twice today. 5.5kWh captured. not bad...

Not sure I agree with many of your downsides... If it's a factory kit, you won't be short. Payment generally phased no difference in floor buildup, same structural and acoustic considerations. Case in point, we've poured screed over posijoists, and while the accousitc insulation is mostly in place the PB isn't up yet. Better half clumps about in hiking boots on the site and based on the foot noise I went outside to talk to her (I could hear footfall but absolutely no indication of direction) only to find she was upstairs directly above me... Floor is both stiff and silent. Exterior walls can be service battened.

stealthy flow restrictor time @ProDave?

I've just poured thinscreed over a FF pipe loop on our build, I've put UFH in the bathroom and ensuite for comfort but the loop also covers the open plan landing/balcony.

Speed of response may well be a positive as well as a negative. Certainly, the supplier of our product thinks so https://www.rtu.co.uk/assets/documents/Ultraflo-Heat-Response-Study-by-UU_180208_142848.pdf

I dunno, 12 tonnes of anything takes a wee while to heat up or cool down.

50mm is fine for many poured screeds, the one we chose requires a minimum 25mm over pipes.

only a small proprtion of the flow will manage to make it up the small pipe.

that sounds useful @PeterW . I didn't think 1/2" at 400mms would want to move too much. @Onoff I'll be filleting the larger gaps but would worry about foam tearing the AT membrane over time as it moves around in the wind. The metallised layer is the AT, and I've noticed that the Sicrall is sticky enough to delaminate the membrane...

that's pretty white!

So I need to batten over our inner insulation layer on the slopes. External walls are already done as part of the TF contract. The ceilings won't be battened, we're using 1/2"TE, and all studwork and the roof are at 400ctrs. Do I need to batten horizontally top and bottom? If so i guess we'd be about 100mm in from the insulation edge to screw firnly through, yes? Or at 400ctrs is battening on the rafters enough? ta.

Yup. Spent too long fitting extra relays to Microflows to signal fan on, back in the day. And that was when they had the Mk1 auto speed control which used a resistor/thermistor pair for feedback & isolation. SLOOOWWW response...

I hope you have more success on the BMS side than some of the lab suites I've been in. Inputs vs feedback vs actual stable control is one heck of a black art...

built-in humidity sensor in our Vent Axia works remarkably well

We did things completely differently. We trawled online "book plan" services (there are at least three big ones over here), found a design that was attractive to us and then via phone and email discussed changes to the design to suit our needs. Ended up being a full redraw, and our guy was absolutely superb.

so you don't have any data?

how do you know that 2ft diameter is overkill but yet 1.5ft is "too slim"?