Missing air gap in the cabin

[Micke64]

The following construction currently exists in a cabin:

Chipboard, plastic foil, 95mm stud, wind paper, exterior panel

Insulation is in the gap between the studs. There is no air gap. The panel is not painted with Falu paint.

Even if no moisture problem is detected, it would be better to address this correctly.

The proposal is to remove the panel, add a 45x70 stud with additional insulation, wind paper, 28x70 nail battens, new panel. There is no room due to the roof, etc., to increase the wall thickness by more than 10cm (hence 70+28).

Does this seem reasonable?

 

[Stefan1972]

do you have any problem today and when was it built?

 

[toolman77]

Is it a vented panel? The kind with longitudinal grooves on the backside

 

[Micke64]

No, no traces that can be seen. The house was built in the 70s.

 

[Micke64]

There are indications of moisture problems in other parts of the house. The panel itself looks good without any visible rot. However, the load-bearing beams under the house are made of pressure-treated wood, so hopefully, there is none of that in the wall.

 

[Oldboy]

I wouldn't have done anything until the panel has worn out.
Why fix a "problem" that doesn't exist?

 

[sblixten]

Remove a few boards from different places and see if there is mold growth.

 

[Peter_K]

My entire house is built with horizontal panel-wind paper-2" vertical tongue and groove. No air gap there either and the oldest paneling is probably from 1929.

 

[Micke64]

My whole house is built with horizontal panel-wind barrier-2" vertical tongue and groove. No air gap there either and the oldest panels are probably from 1929.

Good to hear it's not completely urgent. However, we still want to add insulation, so the question is still relevant.

 

[sblixten]

Install facade panels instead of an extra 70. That way, you will have broken all thermal bridges and won't need to frame up.

 

[Micke64]

Put facade boards instead of an extra 70. Then you break all thermal bridges and avoid having to frame up.

Sounds smart. Any tips on a variant? I basically only find Isover, but it still requires a ventilated facade: https://www.beijerbygg.se/store/pri...ng/glasull/fasadskiva-p-31-619?artikel=302002 or http://static.byggmax.com/Content/G...df?targetFileName=16870 - Arbetsanvisning.pdf

 

[sblixten]

Sounds smart. Any tips on a variant? I can basically only find Isover, but it still requires a ventilated facade: [link] or [link]

But you will have a ventilated facade after the procedure.
I have used isover 31 and P31 and think they are good.

 

[Micke64]

The question is whether it will be cheaper than regulated 70mm. Are there any facade panels with 70 mm depth? It undeniably looks quite neat and simple to attach...

 

[sblixten]

I used 80-panels from Isover a few years ago, but I'm not sure if they still have them. The panels have good insulation value, and considering broken thermal bridges and minimal risks for packed/missed insulation, I think it will be at least as good as regular 70 in compartments. Time is also saved on installation. It is somewhat more expensive than framed 70, but it gets better and you make up for it with the time saved.