Vapour barrier thoughts on renovation

[Space Race]

Finally on the back end of restumping our 12 year old log cabin and starting to think about details for the insulation and overcladding of the walls. I’m following the idea shown in the attached pics (photos from logcabinkits.co.uk) but worried the vapour barrier would trap any existing moisture in the logs.

 

Improving the air tightness would be great but struggling with concept of wrapping wood in plastic. Would one of these fancier “smart” barriers be better? Any suggestions?

The cabin already has some rotten logs I’ll need to cut out and patch and the North face won’t dry out again now whilst summer.

 

Any thoughts from the more knowledgeable on this?

 

For clarity in case its not clear, From inside to out

 

68mm logs

Vapour barrier

Insulation frame for mineral wool batts

Breathable membrane

25mm vertical batten

25mm horizontal batten

Vertical timber / metal cladding

[Redbeard]

Seems like a good use for Pro Clima Intello.

 

I take it the pic with the clear plastic on the outside is just temp rain-cover? 

[Space Race]

Thanks, I'll take a look at that Intello. Assume it's one of these smart membranes. The pics are not mine but the clear plastic looks to still be there after the insulation frame has been fitted, Assume its their vapour barrier.

Someone else used Ekovilla Smart X but I've not seen this as readily available to buy as the Intello you suggest. 

 

Because I'm working on this part time and solo (slow A.F), dealing with Highland weather and all my layers are external, I'm concerned about trapping in moisture 

[Redbeard]

10 minutes ago, Space Race said:

The pics are not mine but the clear plastic looks to still be there after the insulation frame has been fitted, Assume its their vapour barrier.

So you think the insulation went outboard of that?

[Space Race]

Yes. They started with a log building (similar to mine), 3rd pic down is their vapour barrier, 2nd and 4th pic they have added the timbers in which batts will sit, 1st pic shows batts being installed. 5th pic shows their breathable membrane and battens ready for cladding.