Add insulation internally

[Lizzardo]

I am planning a gradual touch-up room by room and due to fairly thin exterior walls, I am interested in adding insulation when I am already changing the surface layer.

The idea is to add a 70 insulation but I am a bit undecided on the best approach......

1: Frame a new wall outside the gypsum, insulate it, and close it up.

2: Tear down existing gypsum, frame, insulate, and close it up.

Are there any advantages to one over the other?
The 13mm I save by tearing down existing gypsum is completely unimportant....
Or is it even pointless to do this in 50-60% of the house?

 

[Lizzardo]

Anyone have thoughts, ideas, criticisms, death threats?

 

[pontuskarlsson]

Ingen som har tankar, ideer, sågningar, mordhot?

Build new walls on the existing ones, as you write yourself it's about a lot of work for 13mm.

 

[olofh]

How old is the house? 60s/70s, so perhaps the vapor barrier, if there is one, is quite worn out and you might want to take the opportunity to fix the electricity as well? It's not terribly much work to take a reciprocating saw and cut up the existing drywall and tear it away. I somewhat regret not doing it, but on the other hand, I don't know how much it would have improved comfort/savings in heating.

 

[Lizzardo]

How old is the house? 60s/70s, then maybe the vapor barrier, if there is one, is pretty worn out, and you might want to take the opportunity to fix the electricity too? It's not terribly much work to take the reciprocating saw and cut open the existing drywall and tear it away. I slightly regret not doing it, but on the other hand, I don't know how much it would have increased comfort/savings in heat.

The house is from the 90s and 00s, but it's a real budget build with rather thin walls. No, I'm not afraid of the job since it's quickly fixed. However, I would rather not do it unnecessarily if it doesn't help when I'm not taking on the whole house.

 

[olofh]

The house is from the '90s and '00s but it's a real budget build with fairly thin walls. No, I'm not afraid of the job as it's quickly fixed. However, I don't like doing it unnecessarily if it doesn't help when I'm not taking on the whole house.

Ok, then neither the electricity nor the vapor barrier likely need to be addressed. But how thin is the wall? You have to make sure the dew point doesn't end up on the wrong side of the vapor barrier, but sure, 70mm might not affect it.

And are you sure they didn't skimp so much that it would be possible to add more insulation in the existing walls? Maybe open up the first room you do to check how it looks inside, but if everything seems okay, I would leave the plasterboard in the remaining rooms.

 

[Nicklas Karlsson]

Steel stud wall and possibly calculate where the dew point will be to avoid moisture condensation on the wrong side as already mentioned.