Nickfromwales

EDIT. PIR upstand should travel a bit further down, eg past the screed some more, but you get the idea.

Lose some of the inner, upper thermalite block. Move the PIR upstand further out. Thermalite can be cut with a wood saw or multi-tool, so make a staggered top edge and keep the coldest part of the thermalite away from the tiles. Then install the Compacfoam (purple) and that's a wrap I also think your tiles would fracture along that suggested line, given the distance of the dissimilar materials they would have to travel over to get to the door

Hi and welcome! You're wife will be happier, the more you know and the quicker and better the jobs get done Then take her on a holiday with the money you've saved yourselves. Winner winner, chicken dinner 🐔

If the lid is rusted and non accessible, you can ask them to replace it and this is almost always done for free. There should be a second stop tap inside, as @ProDave says, so look for that and make a note of it so if you need to turn the water off to the house in an emergency you are not outside on your knees doing it with a hammer and a torch

Yes, separate the two tanks to the two different disciplines; 1x UVC and 1x buffer, if you need a buffer that is? Have you eliminated the possibility that you could drive the UFH directly, without a buffer? With a HP I am a 100% advocate of installing a much bigger cylinder and storing at the lowest temp possible, and this will help massively with reducing the chances of freezing up the unit, routinely, over winter, when you go to heat it up overnight on cheap rate (as the solar will have next to now output then).

Totally get that, but if the membrane isn't absolutely perfect you'll get problems here. Eg the joints would need taping etc. Have you not considered filling the voids and doing a solid floor? I assume this will remain, otherwise, a cold ventilated space, yes?

Hi. Can you crawl under to execute the SF 036 and the membrane?

Hasn't reverse VAT now worked its way all the way back to the supply chain, even at the merchants? If not then that's just stupid, aka 'normal'..... If the builder / contractor verifies you as zero rated, then they should have a passport for the project which entitles them to zero VAT, even at the base of the pyramid. Since 2019 I have paid VAT out on everything and just waited the 90 days to get it back, it's no real ball ache tbh, and my average return was £7k, but most times I was ahead with billing as I trust the public as far as I can throw them. I guess the government will likely just keep charging VAT at the merchants et-al as there are just too many non VAT registered firms out there.

Yes. I'm sorry. There are no cookies. "somebody" ate them.

Good girl. Help yourself to a cookie.

Yup. Spend the money on something that has no moving parts, near zero maintenance, and gives an instant RoI. Solar PV, or more solar PV, or a battery.

The hole / gap can be filled with CT1 and smoothed flat with a scraper, and left to cure. The tanking solution will cover that in 2 coats with ease. I don’t really bother with those collars / grommets, even when supplied.

Try contacting these folk? https://www.tilingsuppliesdirect.co.uk/product/mapei-mapeguard-st-sealing-tape-corners-gaskets?attribute_option=Pipe Gasket 10-24mm&gad_source=1&gbraid=0AAAAADi7Txwhm5bQ3G4JvQUvTF7oz_nyn (Random internet grab)

Yikes. I’ll add that to the list. 🤦‍♂️. Appreciate you sharing that, thanks. That’s provoked me to contact previous clients to get a PRedV installed…… No mention of that in the manufacturers documentation when I installed it. Yay. Didn’t even come with 3-stage filtration, I had to ask the client to order that independently, ahead of my arrival. UV sterilisation should be standard, I assume this would make things far less grotty inside WC’s and washing machines?

What do you think is stupid money? To not have my ceiling cluttered with the usual ‘utilitarian’ looking air valves I’d happily pay these prices, especially in day rooms such as kitchen diners and living rooms etc, but even more so in a bedroom where the linear can be lost over a window etc. Why scrimp on something that you’ll be looking at all day every day? Place them strategically and design the layout sympathetically and you’ll have adequate, even, quiet airflow through any space. The projectile effect, a benefit from the Coanda ethos is a bit OTT here, usually reserved for long throw instances like commercial and public open spaces with vents on the vertical facades vs a small ish residential dwelling No need to go to all this hassle, and I think there’s a bit of overthinking going on here tbh.

Just post the plans again in your next post, please. I have removed them from the original, as it's the documents themselves that need editing before posting vs the post

The inner course should have been done away with at the openings?

If cold air cannot get into the void, then delta T and interstitial temp differences diminish massively. Also helps that the blown-in cellulose slumps back under its own weight so is not in true full contact with the underside of the OSB. The residual air gap is stagnant, and the humidity therefore controlled to a point that this is just non-problematic. I'd prefer this option vs a hybrid, as you have to be very conscientious (there, I spelt the bastard right this time lol) going down any other routes. Critics will choose safety in the face of fear, as in they doubt themselves and take the safe way out.

Oh bollocks......not enough sleep happening atm lol. Consciencous / conscientious. LOL....................................we're both shite at this haha

But not as big a bonus as "reverse VAT" on a LOT of things, meaning you don't pay the VAT in the first place, and therefore you don't have to go out of pocket from the get-go and wait until the end of the build to get it back

Architectural technicians are usually less pretentious and much better value for money. I take it you know you’ll be zero VAT rated for a replicant dwelling also? Start asking questions and searching the forum, fail to prepare - prepare to fail. Much better, and far less stressful, to understand the problem and resolve it before hand vs on the fly when the money clock is ticking

You can go for a hybrid roof there also, but the execution needs to be flawless. Needs a VERY contentious installer.

All I can say is it was the 5m x 5m ish balcony, and then a strip running off that about 1.5m wide x 7.5m long, basically a flag shape section of flat roof. No ventilation, MBC PH TF, and currently been weathertight, insulated (fully pumped with cellulose), and dry for prob 3-4 years, been lived in for 6 months and zero issues.

You are mistaken. These issues probably happened AFTER you took out the insurance. I am sure you just have very bad memory......

I've just moved clients into an MBC TF (PH) that had this exact detail, and the GF flat roof ran between the 2 separated upper floors (house had two staircases) and extended out into a 5m x 5m balcony. No issues there and I have been on site there on/off for a few years, including being up in the cellulose looking for a lost MVHR connection (that was just a delight....). I am finding out, at a saddening rate of knots, that the types of people in the industry I used to look up to are well educated f*ckwits. I've only met 2 or 3 architects over the last decade who have impressed me, others I have recommended the clients dismiss (and go with the one I rated). It's shocking how the public are left to rely on such people to help them and trouble-shoot, even at the design stage (pre-construction) but are just useless on a good day, expensive to the point of destruction on the bad days....