An ornate façade, shared parts of the building and renovation constraints can rule out a straightforward external insulation plan. In a flat in a tenement building, internal insulation can then be considered. It is not worth starting by choosing the thinnest PIR, however. The wall, floors, moisture and the conditions for carrying out the work in the specific building must first be established. Heritage protection may apply to various elements, and the scope of the necessary approvals depends on the building and the works. The ownership of the walls, floors and installations also matters. The inability to alter the elevation does not automatically mean that every intervention from inside is permitted.

A garage for parking, a place for repairing bicycles and a cabin visited in winter have different needs. A sensible budget does not mean buying the thinnest board for everything. First you need to establish where warmth is required, how often the heating will be switched on and where moisture in the room comes from. Only then do you choose the insulation. If a car is simply parked in the garage, human thermal comfort is not the main goal. When you repair sports equipment there in the evenings, the temperature at the workbench and the absence of draughts become important. In a seasonal cabin, the time needed to heat the rooms after a long break is an additional factor.