new build outside light

[Rockingit]

Of course they do, but the main reason they like them, is building cost, and how fast they can be thrown up, not necessarily the reasons you give!! Those vapour membranes, are critical!! loss of it's integrity and and rot and damp will follow. And with the timber sizes that they use these days, it wont take long to rot through!! Give me a conventional built building every single time!! lol!!

Nothing wrong with the concrete framed, block infill buildings on this project!! lol!!

I'm not disagreeing with you, but if you take a step back and think about it, any component of a building system is 'critical' these days so what's with singling out just one method?

 

[kw1980]

Drill down into kit, then straight through both skins, including vapour barrier. Then all you need to do is cover over the hole you have made with an appropriate tape. Aluminium foil tape works, or I have also used another cloth like tape (this was more suited to a passive house type environment)

 

[Rockingit]

Drill down into kit, then straight through both skins, including vapour barrier. Then all you need to do is cover over the hole you have made with an appropriate tape. Aluminium foil tape works, or I have also used another cloth like tape (this was more suited to a passive house type environment)

You're assuming that it's not been boarded already! If you can be close enough to tape the barrier then you're close enough to do the job properly and not need to puncture it in the first place.

 

[kw1980]

Jobs I work on come out of a factory pre-fabricated with vapour barrier already in place. And the job does get done properly!

 

[Rockingit]

Jobs I work on come out of a factory pre-fabricated with vapour barrier already in place. And the job does get done properly!

How/where do you tack cable then? Do they come with an additional 20-30mm battening before boarding to create a services void? Am assuming the joist space is packed with kingspan? (Genuine question btw, it's something we struggle with all the time if there's no batten space!)

 

[kw1980]

Yes, they come with 40mm battens running vertically, cables are ran as normal through floor joists then down inside service zones. 1st fix joiners fit top and bottom runners before attaching plasterboard. The wall panels and roof panels come pre-insulated so no Kingspan in between joists.

 

[ayjay]

all these posts on such a basic q from a poster that has ect

its a ****take

 

[Rockingit]

Yes, they come with 40mm battens running vertically, cables are ran as normal through floor joists then down inside service zones. 1st fix joiners fit top and bottom runners before attaching plasterboard. The wall panels and roof panels come pre-insulated so no Kingspan in between joists.

Lucky you! We normally end up with a bun-fight for the last 20mm left on the joist to clip to before VB stapled over and then boarded. But this is just 'normal' vapour barrier not Passive House. Did a Passiv a couple of years ago but it was a self-build on site so we got the first bite whilst the frame was still open. Was still a complete PITA though!

 

[Rockingit]

all these posts on such a basic q from a poster that has ect

its a ****take

Well if you care to actually read them you'll find that the last 50% has been valid discussion on the relative points of timber frame construction - I hardly call that taking the pi55.

 

[kw1980]

Usually work with normal vapour barrier, have only done one job with a passive house set-up. Came out of the same factory, same set-up regarding joists and service zones. Different tape used was the only difference for me, but the joiners had a real hard time passing the air tightness tests.

 

[DPG]

all these posts on such a basic q from a poster that has ect

its a ****take

Ayjay, have you ever posted anything useful or helpful? Daz

 

[Rockingit]

Ayjay, have you ever posted anything useful or helpful? Daz

Not that I can think of!