ᐅ Insert insulation between rafters?

Hello,
I am planning to buy a house built in 1974.
The roof is completely uninsulated, so insulation is required.
There is continuous wood nailed over the rafters, so the tiles are not visible from the inside.
The attic is finished as living space, which would mean that the roof would need to be insulated from the outside if you don’t want to completely tear apart the interior of the apartment.
However, from the remaining crawl space at the very top, it is possible to see between the rafters all the way down.
Now the question is whether there is insulation that can be stuffed down from above there and still meet the regulations. Of course, this depends on the rafter thickness, etc.
Or is this complete nonsense and not something to worry about at all?

You could cover the roof and insulate between the rafters, and additionally add insulation on top of the rafters. That’s how it is done in our case.

Hello

Blown-in insulation could be the solution here.



Olli

I am using Iso Floc myself. These are salt-treated paper chips (making them fire-resistant and unpleasant for pests) that settle into every crack. It is ideal for corners and angles (so also for your application) and is blown in with air. The insulation properties are therefore not perfect but acceptable. Of course, you can find more detailed information in worldwide media sources.

In 90% of cases, it is not possible to comply with the energy saving regulations because the rafters are too thin.

Hmm, yes, I already suspected that, but it was still a good idea, thanks.

Apart from that, would it basically be possible to insert a different insulation there, or does it have to be installed in a specific way? I need to measure the rafter thickness sometime. If there isn’t a sufficiently insulating material for the existing cavity, then it’s not worth pursuing.