Alternative VCL to DuPont AirGuard Control

[Constantine]

Hi all,

My Architect has specified I use DuPont AirGuard Control as my VCL. I'm aware it's a 'brand' and as such there may be more cost-effective alternative products. Can anyone recommend one, please?

Con

[Russell griffiths]

TBH there are thousands of them, I would look at your budget and pic one to match it, at the cheapest end you can use a roll of polythene, and at the dearest anything from SIGA. 

The INTELO stuff looks nice. 

[MikeSharp01]

Be a bit careful, we went through this in our design and are about to go through it on our build. Using vapour barriers as the air tight layer - EG sheets of polythene is a risky option as it does not allow any vapour to pass through thus making it more likely that moisture can build up in the wall fabric. Hence your architect has specified a VCL as the air tight layer on the inside of the walls. Naturally on the outside you will have a breather membrane as a secondary water protection layer behind the tiles / cladding. As I understand it, others are more knowledgeable, the breather must be more permeable to moisture than the VCL so as to drive moisture out but it must be possible, when the conditions are right, for vapour to pass through the VCL back into the building - usually in the summer. 

[A_L]

Here is an alternative with about the same vapour resistance.

 

https://novia.co.uk/vapour-control-layers/vc2-avcl

[MikeSharp01]

10 hours ago, A_L said:

Here is an alternative with about the same vapour resistance.

 

https://novia.co.uk/vapour-control-layers/vc2-avcl

We used this on the Garden room part of our build in Whitstable, easy to use and relatively cheap (£70 per roll +VAT). Following your prod @Constantine I will revisit our wall / roof build up as I have noticed that the breather (not the VCL) is after, on the way from inside to out, the main insulation but before the metalised PU. 

Edited September 8, 2019 by MikeSharp01