Discovered that the outer wall lacks insulation, what do I do?

[vedtony]

During the replacement of some windows, I discovered that there's no insulation in the wall. Someone seems to have nailed raw boards onto the studs without insulating behind. Since it's an old house, maybe there wasn't anything available at the time(??)
But no wonder the walls have been ice-cold during the winter months..🥶😄

Does anyone have any ideas on what can be done? Fill with foam? Sawdust?

 

[Avemo]

How old is the house? There might be insulation deeper in the wall. I don't believe in fitting anything insulating into that gap. It is possible to tear down the inner wall and install a new one with insulation. But that would be quite a lot of work for a moderate amount of insulation.

 

[vedtony]

How old is the house? There could be insulation deeper in the wall. I don't believe in getting any insulation into that gap. It is possible to tear down the inner wall and install a new one with insulation. But it will be quite a lot of work for a moderate amount of insulation.

I've been told that it is a timber frame from the late 1700s, and then various boards have been added much later.
But as mentioned, the walls get cold, so I would preferably want to do something about it somehow.

 

[Ubbe55]

You should be able to blow cellulose insulation into the wall but it probably requires hiring a company for this. There's a link to this on byggahus. https://www.byggahus.se/forum/threads/blasa-ekofiber-sjaelv.137344/
Good luck/Urban

 

[annsofian]

I previously owned a detached house from 1908, completely uninsulated plank frame, probably never has been either. As I see it, there are 2 options:
Add insulation to the outside, consequences include changed proportions, shorter roof overhangs, deeply set windows that make the inside darker unless you move them out.
Add insulation to the inside, consequences include less living space and a lot of work to restore the entire interior.
Option 3 is rugs, wool socks, and a stove...

 

[leifherlin]

I previously owned a house from 1908, completely uninsulated plank frame, probably yours has never been either. As I see it, there are 2 options:
Add insulation to the exterior, consequences are changed proportions, shorter roof overhangs, deeply set windows that make the interior darker unless you move them outwards.
Add insulation to the interior, consequences are less living space and a lot of work to restore the entire interior.
Option 3 is rugs, wool socks, and a stove...

Voting for option 3, works perfectly in our house from the 1800s.

 

[Oldboy]

If it is a log house without siding panels, it may be due to fears of moisture in the wall and, therefore, not insulated.