Nickfromwales

A self-builder is more than capable ( most do anyways ) of documenting, with pictures, the methods of construction for the dwelling. Fabric standards etc become irrefutable then, plus the seller would then be able to show statistical data from the solar inverter / electric bills etc and effectively ( and factually ) demonstrate the very low running costs of the property as actual facts / figures. Selling with these credentials should sort the wheat from the chaff. Soon there will be a better clientele, but better builders will need to come first.

Just a word of advice here, to anyone about to plan / undertake such works. Your local water authority will have very particular guidelines and specifications for this type of work to be done to. Don't let your groundworkers assume that the previous job would be a good enough template to go off!! Ask the LWA for their specifications and learn them up front, on behalf of your chosen contractors, then be sure to ask your groundworkers to tender for THOSE specs vs what they think will be 'acceptable'. Garnish them with copies of everything and make sure they've read and understood it exactly. Measure twice, cut once

No good around a door which gets slammed / there's movement around the perimeter of.

I love it when you talk mathy.....

You could get some 1/4" steel plate and stich down both sides of the timber ( to form a steel splint to join the wood sections together ). Would be entirely possible as long as there isnt any issue with the wood. If it were mine, it would be an RSJ all day long. Steel RSJ's are cheap as chips tbh. But not to run under the joint, I'd go the whole run under the timber, end to end. What is the length of the garage from wall to wall?

Peter is correct. 10mm runs should only ever come off 22mm 'main' pipework. 10mm pushfit off 15mm pushfit is 1st year apprentice plumbing. Did you have to give this one a bottle of warm milk every 4 hours? For your build / fabric type I think 9kW is way too low an output. If there NEEDS to be a thermal store, then the ASHP should have been spec'd as a high-temp split. Not the best I'm afraid.

Food’s really nice there.

You always have a push-fit or compression fitting immediately off the waste / trap. Some European stuff have a solvent weld fitting on an adjustable / universal joint but I’m not a fan of those tbh. I only recommend what I’ve been doing, leak free, for nearly 3 decades. McAlpine are ‘industry standard’, but other suppliers may do something different / more pleasing to the eye etc. Impey stuff is bombproof. Order as you need things, unless you have safe, secure storage where these things don’t have to be moved out of people’s way every 5 mins.

Go see Chris in the Swan Inn in Sturmy, and I'll put one behind for you.

Either way around, I do not see how this can compete with a blower and an ear, then smoke to finish up if required. How many times are you supposed to heat the place up? And how, effectively, in a new, partially constructed, building do you heat all the spaces up enough to keep performing this test? How much difference in temp must you create when the temps in and out aren't miles apart? Last clients test, you could hear the air getting sucked through a hole where a screw had been put in and taken out, eg which should have been AT taped over. KISS.

You've not got any pubs near where you live?

Thermal imaging for airtightness testing is a load of nonsense AFAIC. Heating a house up and then running around outside before it cools down will not show you where it's leaking inside. Indiscriminate on a good day, utterly useless on a bad one. Snake oil if you ask me, and bloody expensive snake oil too. "No".👎

Expert status is now upon you. 👊

It basically sheds any excess energy, above a set point, to ground ( via the earth pin ) instead of dissipating it via a sacrificial component ( as an SPD does ). All good, give it a whirl.

TBH I'd go for the Belkin, as it's rated at 13a and offers a guarantee against failure of devices plugged in to it. Download the MI's from Belkin and read up a bit to see if it says no pumps / inductive loads over x number of Watt's etc.

It's mandatory, but wont solve this particular problem. The OP needs a filtered supply to remove spikes / soften disconnects when the grid drops. An SPD isn't for that and won't 'trip' in these instances ( or the world would go potty as that would be £200 or more each power cut, plus the wait for an electrician to attend to replace the SPD ). Remember that an SPD is a single shot device and blows like a HRC fuse would.

All wastes are top access ( aka “self-cleaning” ) with nothing underneath than waste fittings. There’s nothing to ‘get at’ so don’t worry about that I waffle on considerably here;

It needs to be a filter, vs a one shot SPD etc. That will give protection from frequent fluctuations, and not need expensive replacement by an electrician ( after every power cut / surge ). The shower is a digital mixer so no big power supply. The one linked in Screwfix should be fine. Or; https://www.argos.co.uk/product/9473188

Greggs sausage, bean and cheese melts are available in the N, E & W so not a problem. Down South it's a cartel.

AFAIK "have" to. It's to limit the current on the consumer tails. @ProDave?

If there's a 100a in the supply head, and there needs to be a 3rd party SF as the tails are >3m, then you're supposed to de-rate to 80a in the SF.

What is there not to like about this chap? 👍

Most is down my back Makita 18v hairdryer lol? SWMBO can then share my batteries.

Hi, and welcome. I'm a very big fan of MBC Timberframe's turnkey slab / frame package, and if you want a stress free / as seamless as possible a build then that's a great option. Not the cheapest option afaik, but very quick and simple with the majority of the paperwork / red tape / professional services all encompassed. I don't know of any other TF suppliers that actually offer this as turnkey, and I do know some suggest this but then fall quite short on delivering. Go up and see MBC's factory, and you can even go and see builds in progress, which may be beneficial to you. Other companies offering this likely do exist, and I'm sure others will post here accordingly. Happy hunting, and good luck. Don't forget to search this forum for everything else, as there's a massive amount of good information and support available here .

If you were happy, could you share their contact details here please? Subject to their agreement also.