Super_Paulie

im just doing the job in my place now but im using PIR, 2 layers of with the lower PIR between battens on nails and foamed in, the top layer on battens. Air-tight foamed where necessary, taped over and then the next layer of PIR foamed and taped. Then foam all around the perimeter. Zero drafts, cant feel any air movement at all but it wasnt an easy or quick job but it looks like it'll do the trick for my UFH. Too late to go back now anyways 😆 When i got down to the last piece it was like a howling gale underneath from the airbricks, all gone now.

havent leaked yet, seems a decent bit of kit.

Cheers gents. The 28mm goes on with a bit of cutting, slicing and cable ties. 35mm would have been better as JohnMo says, but this will work for me. Much appreciated as per 👍

I've just picked up some 28mm from Screwfix, see how that goes. That's as big as they went so I'll see how I feel about it.

I don't think I have it in me to start to carve up PIR again, was the most brutal part of the build so far! Nice analogy though 😆

I'm just about to seal up my floor. Forever. Before I do, what are people's preferred methods on insulation of the fittings within the void of a suspended floor? Or should I not bother?

Cheers guys. I've done what the majority have suggested above. The pipe leaves the floor around 100mm from the wall and is capped ready to extend into the cabinet when the time comes. Appreciate your input as always you lot 👍

sounds like a winner. So something like this, coming out on the room side of the joist and straight up into the unit. Could easily cut the unit out so the unit can be slid out if ever necessary and a false back on magnets or whatever to conceal it all. (waste not shown in image, obvs)

yeah this is coming up to the rear of a 300mm unit to the side of the washer. I could bring it up into the cupboard from the bottom like you say, i usually bring them up in the service void and then have a false back to conceal the workings so the cupboard is still free to use, and if i have major issues i can remove the cupboard and all the plumbing is still in-situ. However thinking about it i can see the advantages of having easier access to the valve the way you describe.

pipe is 15mm. If i chase the wall then it seemingly would be difficult to get that to come out at 90degrees unless i convert to copper below floor level, the bend radius isnt great on the layflat in comparison to a copper 90. Not a bad shout though.

mornin. Pretty easy one for the guys this morning. Ive got a situation where i need to bring up my cold feed for the washing machine and the wall is very close to the joist. There will be units over the pipe work. The wall is back to bare brick so it will need boarding which makes it even more tricky as it will project at least 20mm further. Do i: A) bring up between the brick and joist, manipulate the pipe to bring it past the board and then clip. Means the board wont be able to go as low as i would ideally like, or i could cut a channel from it B) go the other side of the joist and manipulate it back over. Means i can board lower but the pipe will be exiting the floor quite far out is possibly further out than the service void of the units C) chamfer the joist. Probably no good as its taking too much structure away but i threw in the picture for reference D), convert plastic to copper under the floor and then bring copper up with a few 45 bends. Means a joint under the floor which i was trying to avoid. Any opinions on best practice?

the Smiths SS80 is designed for low plinths like Ikea ones, based on the name im thinking they need a plinth that is 80mm high. Still might be a stretch but you aint gunna get smaller than that i bet. Smiths SS80

i have 2 large rads and 2 plinth heaters in my large space (70sqm) as a backup for the UFH. Those plinth heaters really chuck out some heat, might be worth looking at if you have a lot of kitchen units.

my "backup" radiators are the classical style i guess you'd call them, raw triple column and the heat they give out and retain compared to your standard radiator (that i have elsewhere) is unreal. They stay warm for hours afterwards when the others are stone cold. I have 22mm chipboard in mine which leaves me nervous for when i finally get round to commissioning it. If i could go back id defo get 18mm or a cement board of sorts but im all in now with the chipboard.

@JohnMo is really clued up on this and might be able to advise you further.

I wonder how the zones work around a beam like this... Might have to do some research on that one as I guess anything within 150mm from the ceiling and the wall is technically a zone. But where does that leave under the beam as it just ends rather than continue down.

i have my lower PIR attached by using clout nails into the battens and then pushing the 50mm into those nails so its held in that way, then foamed and taped. Then the 120mm over the top, staggering the joins and again foamed and taped. Yeah, the more insulation the better as far as im concerned, i have mine over the entire ground floor no matter if it has UFH over it or not, such as under the kitchen and island units.

as long as the EPS70 doesnt enclose in the bottom of the joists it'll be ok. The bottoms need to be left exposed to the air under there. See attached for what i have done in my own in terms of insulation, the lower 50mm is held on nails and the whole lot foamed and taped in. So long as your UFH system and design is sound, i dont see any real issues. JohnMo and Nick on here will be along soon im imagine, i got most of my top quality info from them in terms of buffer tanks etc.

The problem with all of the ideas is that my wiring will be out of zone to get within the flange of the beam. I'd have to go down (or up) and then sideways towards the web. Going out of zone is surely a no-no but I can't see a way around it.

i guess this would be more accurate, but without a switch directly below it then id be out of zone.

so far there is zero wiring, so everything is still on the table. The idea of the socket was to plug in whatever, LED strip, fairly lights, i dont know, and have it controlled via a smart socket rather than having a physical switch. We have a lot of smart control in the house and this was just an addition i said id look into. Its just to be used on rare occasions/events/ id image (not at all). But yeah, looking at it a socket up there would be troublesome if the smart ever packs in. So a light switch below, that would create a zone as well, and an exit above with a transformer sat on the beam. I guess that would make the device (whatever it is) not really transferable to some other latest gimmick she likes.

the missus has decided that having the option to plug in LED lighting along our exposed steel beam would be a nice idea. However im a bit stumped on how to achieve this as to get a socket within the flange of the beam seems impossible to do and keep the socket in a wiring zone, see attached. The only way seems to be having another socket horizontal to this one further along the wall but that doesnt sound great. I can come down from above but i wouldnt be able to get past the top flange of the beam. The dotted lines are the concealed steel post and the other end the beam rests of a brick/concrete pad stone, the wall to be clad with brick slips. Does anyone have any bright ideas on how i can achieve this, as im a bit stumped.

how do you connect them? L-in live, L-out switched live. S1 to the live side of the switch and S2 the returned switched live? All my new switches have a neutral as i made it that way but my old part of the house doesnt, so these might be interesting.

i hang my buffer tank on the wall with resin and threaded rod, it aint going anywhere. Could probably inject the resin into the hole and then drill and plug it again if thats the route you fancy.

going through something similar, but different. My builder didnt leave a big enough return next to the bifolds so i need to get the slimmest possible due to the above that the doors need roughly 8cm protrusion to actually open. I found a Haier that was 66cm deep and a Beko that was 70.5cm but its frustrating that i cant just pick and choose which was going to be be initial intention. Even so id have to bang it up almost flush to the wall behind so id likely have to carve a recess out of the blockwork at the bottom and not plasterboard the whole area behind the fridge. Still probably blow up but got no real other option.