Hello Peter. If I now answer "You are right," it should still be taken with caution. Not because I am writing this (and have no idea), but it depends on whether deduction areas (such as walls, etc.) have already been subtracted or smaller radiator niches (which are also covered) have been taken into account. Furthermore, it depends on the room geometry, whether the doors (and thus the door frame) open inward or outward. And finally, to confuse you completely, the parquet measurement must be considered. Due to the required waste, it is important and decisive whether one wants to lay long planks or a mosaic parquet with a cube pattern. Solution: Each room must be measured individually to create a measurement plan. This is not absolutely necessary, but it may save you a trip to the parquet dealer to either reorder material – or return it. Both are unpleasant and can be prevented by measuring the area of each room! Good luck: KlaRa