When you own a house, summerhouse or other property, you are obliged to pass through chimney inspection at least once. a year. Even everything is ok, it costs you 400.- crowns.
This is not valid for the roof. The roof check is not mandatory. In case you will find some leaks inside the building, it can be already late and the damage can be rather expensive to repair.
If someone should look at your roof, you need a telescopic ladder or a high-lift platform, or dismantle part of the roof to get to where it is needed and the operation can stretch for an hour or more, depending on the size of the roof.
This is not the case if a drone is used to inspect the roof. It is a non-invasive operation where the inspector does not risk falling through the roof and causing further damage, not to mention the speed of the inspection.