Pocster

I *presume* I silver tape the joints on the floor between each pir piece ????

I see ! Right ! Vcl over the lot and up past the upstands . All taped got it !

Why can’t I just cover the whole thing in vcl and tape it further up the timber . Why do the dpc strip around the perimeter? Is the vcl thin and likely to tear ??? That why ???

They would be perfect for that ? They have no grip on the surface but certainly don’t seem slippery when dry . They are structural glass so strength not an issue ( BUY THEM ! )

Nope ! Never gonna sell . I might build a modern art sculpture and incorporate them into it

Yes very dangerous device ; Best Buy something gentler like some glazing for example ... ?

I got a special price thanks to @Onoff.... You can’t have it unless you buy some ‘certain’ glazing I have ....

Toys !

So should I bend the dpc timber up onto the studs and nail it ? (only about a 30mm overhang) Then DPM 60cm wide around edges and up stud. Then that permagard membrane over the lot?

Surely I just need vcl Installer suggests https://www.permagard.co.uk/catalog/product/view/id/1532 Doesnt want black

You made it up good ! . I’m going with that ! Might have to pack between vertical timbers as membrane could sag between when screed goes on .

True - it would be lost with pb etc . yeah upstand pir 50mm So this type of thing ? Dpc overhang pushing the back pir out hence why I want to know if just taking a Stanley knife to it and trimming flush to timber frame ok .

I can ignore the lip and do this ? Can I trim the dpc under the timber frame as it gets in the way ?

Confused myself now . The original photo was upstand at finished screed - but that then means the edges won’t have any screed over them !!

So you are suggesting potentially this type of affair ?

Horizontal timber is base of timber frame

No Here’s a better photo

Hmmmmmm looking back at other photos i’m Not so sure now ! . Should the upstand be the same height as the floor pir ? I.e in my case 150mm - so it’s all flush ??

So in essence this ! ( with upstand at far end of course )

Step in block work at front wall - can’t remember why . Pack out with pir ; then our upstand in place . Just demo at the moment until someone says it’s wrong . If ok will foam in

Floor to top of timber frame is 23cm My floor has to be 50mm higher than planned . So I assume 150mm pir allows plenty ( 60mm ish ) for ufh and screed .

UFH company says for upstairs "We recommend a heavy duty 500G (polythene gauge) / 125m u (micron thickness) polythene membrane for the vapour barrier, green/clear so that you can see any markings made below." I'm guessing by "marking below" he means any markings I place on the PIR to show (for example) where I don't want pipework.

Ok - this is where I’m getting confused is dpm , membrane , vcl the same thing by different names in this context ??

We will be having tiles . My doorways are part on the blockwork that the timber frame sits on . So not entirely sure what you mean . Will take a photo tomorrow

Ok. I'm on beam and block ( upper floor!) So! DPM around room taped up the sides. PIR on that taped + PIR up stands DPM over that taped up the sides yeah? What about the holes for return and flow fo UFH?. Mine are coming up through the block floor. I don't think expanding foam likes plastic pipework. So what do I fill that with?; also assume just tape around the holes to DPM