Someone is drilling about a hundred holes in my house as I write this entry, hence the reference to cheese. They'll - at least I expect them to do so - also fill those back up afterwards, once they're done insulating the cavity walls. This relatively small investment should pay off quite well over the course of time, with ever increasing energy prices. I'll never be able to make the current house a Low Energy House, because to do so would require extensive changes, which are realistically only possible when taken into account while building.
The cherry on top of the cake is the fact that 42% of my investment is paid for through various local and federal government grants.
In case anyone is interested : Pluimers Isolatie.
Cheese, cake... could it be that I'm slightly hungry? Off for a bite!