Internal VCL position

[BartW]

Hi,

we are midway through our timber frame house. 
 

We are now installing internal VCL and (as always) I am checking if all is being doing correctly when it is already done.  
 

seeing another post about vcl last night made me think if I am actually doing mine correctly. 
 

our wall buildup is as follows feom out to inside:

- timber open screen  cladding 

- UV membrane

- 25mm horizontal battens

- 25mm vertical battens

- external vcl

- osb

- 140mm timber frame

- 120mm insulation in between 

 

I then installed internal VCL, and aim to cover with 50mm PIR, then service battens and plasterboard. 
 

 

is it non-conventional?

 

most importantly, is it ok? It’s done now…

[Kelvin]

I was going to ask a similar question. 
 

The air tight barrier generally goes on the warm side of the wall. However I’m also thinking doing as you’re doing. Our timber kit build up is a full filled 302mm CPS space stud, 9mm OSB, air tightness barrier, 25mm service void, 12.5mm plasterboard. I was thinking of filling the service void too. 

[nod]

3 hours ago, BartW said:

Hi,

we are midway through our timber frame house. 
 

We are now installing internal VCL and (as always) I am checking if all is being doing correctly when it is already done.  
 

seeing another post about vcl last night made me think if I am actually doing mine correctly. 
 

our wall buildup is as follows feom out to inside:

- timber open screen  cladding 

- UV membrane

- 25mm horizontal battens

- 25mm vertical battens

- external vcl

- osb

- 140mm timber frame

- 120mm insulation in between 

 

I then installed internal VCL, and aim to cover with 50mm PIR, then service battens and plasterboard. 
 

 

is it non-conventional?

 

most importantly, is it ok? It’s done now…

All the TF that I do have the barrier directly behind the PB

[BartW]

3 hours ago, nod said:

All the TF that I do have the barrier directly behind the PB

But would the way I have done it be ok?

[Roundtuit]

8 minutes ago, BartW said:

But would the way I have done it be ok?

I hope so, internally it's very similar to ours: brick outer skin, 50mm gap, beather membrane, 11mm osb, 140mm frame with 120mm pir, then VCL (airtight membrane), with 40mm of pir over the top, 25mm mm battens then plasterboard.