Oz07

Ah I understand i had manifold in last place worked well. If your cylinder is in airing cupboard and you have a separate utility/ plant room i suppose you'd have hot manifold in ac and cold in utility/plant?

What does that mean put in layman's terms

If you have manifold close to hot water tank then presumably could use big pipe to manifold?

Was that a typo in your original thread about australia? All their loos seem to be connected on a flexible with a tap on the wall. Must be some kind of reg over there? Here a lot of our toilets are plumbed in with fixed pipes. Even my old concealed loo was done with fixed pipework IIRC. Is there a reason they have to be on a flexi? Presume its too hard to change now.

I think OP said he was restricted to 350mm total due to foundation. My point is by the time you spend upwards of 2k on 25mm pir, 25mm battens and lose 50mm of internal space it doesn't seem economical

I'm with you I've never used pir in cavities either. I've done traditional with dot and dab and got great air test score. Parge coat prior and linked to airtight membrane on ceiling. I don't see how the pir helps you with this?

I think they're always a bit undersized. They're always designed to be filled or skimmed so suppose it makes sense to be smaller rather than bigger.

Is the blockwork already built up on the rake? If not you can nail it beforehand. Otherwise tosh one through top and bottom, not ideal. I've never really thought about nail position just do what looks right. A nail wants to be 2/3 into the back 1/3 into the front usually so just work on that principle. Obviously you dont want it near the thin cut edge it won't be doing anything. You want quite a lot of meat.

3 nails id have thought. It’s not something I ever give a lot of thought to just stop nailing when it looks right. The one next to wall just nail thru back of hip or valley into jack.

AI even coming for the blue collar jobs now

As @saveasteading id just give it time

I never had this problem after 5 years. Even more annoying for you if you're softening the water prior. What is likely cause? Suppose you could swap the manifold after 10 years and consider it a consumable.

And ask for the whole garage

Why are they trying to reinvent the wheel. Cement mixer and barrow is fine. Can't see anyone using it for a form pour

Why can't you dab tapered edge boards? I've done it before when only ones available. How much is a sheet of 25 bet its half the cost of 100? Will you go battens between pir or on top?

Ask AI what the payback period will be 25mm PIR is expensive for what you get.

Get some terriers. @Nickfromwales made me laugh you're on of these people we laugh at when we see a clip online of seagull nicking your chips. Why are you constantly targeted by them? 🤣 need to be on your guard more. @ToughButterCup this is what worries me about airtightness relying on hard to access membranes. A ceiling one is not so bad if can be accessed from above but a wall one sounds a nightmare to get to.

Think severn trent ask for 750 min here. Then their boundary boxes struggle to go that low.

Not meant as a dig @Gus Potter but would you agree that a house can be built without SE input? Not this particular house or this particular scenario nessecarily. Or would you say that every house built needs SE input?

Hear hear! In every industry. Hopefully a massive recession happens and we wake up and smell the cheese

God what happened to the future and the age of abundance. I'll deffo be putting aircon in my next place and I dont consider myself extravagant.

@Indy https://forum.buildhub.org.uk/topic/43530-mvhr-who-needs-it-i-dont/#comment-611326

Where is OP Cornwall?

I don't think they are mandated. I've had air scores lower than 3 in houses before and nobody has ever came along and forced me to have one. There's no mechanism to, unless the bco is very switched on. Besides isnt it mechanical ventilation which is in the regs not nessecarily mvhr? What's all this Dmev stuff you hear about? You're in the m&e business can we trust your impartiality here 🤣 I'm just saying I've lived with one in an airtight house and without one in a house with a score less than 3. Its just my personal opinion, nice to have but windows also work. Are @ToughButterCup and @nod nuts too?

Its unfortunate isn't it because they're a good window to have in summer can get some natural convection going.