Isolating the roof is quite a job. We have 144 packs of rockwool that, in total can cover 518^m. The layers are 12cm thick and we’ll use a double layer. In total that should make the volume of the house decrease by about 31 cubic meter. So, not only is there less volume to keep warm, there also is an impressive 24cm layer of isolation on (nearly) the entire roof. At a few spots there is not enough room the fit in the entire 24cm.
With the isolation, the house becomes more homely. Less ‘hall-like-sounding’ and less direct temperature influence from the heat radiating, black roof tiles (obviously).
The tools with which you work are impressive. The orange (Hultafors) one is thinner and feels slightly flimsy. The black one (official Rockwool issue) is thicker but lacks the teeth at the curved tip. That makes it cut less well because when you cut on a table, the curved tip is what cuts the few millimeters that are on the table and the teeth cut a lot better than just a sharp edge. So, in case you ever need one: the orange one. We’re told the knifes can be sharpened with a right angled grider, but we have not been there yet.
With the isolation, a bunch of things are hidden ‘forever’ (or until we start working on the outside part of the roof). Ghostly faces, asbestos, electrical wires. A bit scary: “what if we need to get to it again?”
Once the two layers are on there, it will be finished with damp-proof membrane. Trying to get it around all the obstacles as good as possible…
