Expansion gap
How much of a gap should be used in a hornbeam floor with an area of 15x20 metres? How much of a gap should be used in an oak floor of the same area?
An expansion gap should always be left where the length of the surface over the width of the floorboards is greater than 8m, and over the length greater than 12m. So the largest surface in the optimum configuration is 96 m². On a surface of 300 m² there must be one central gap along and across the surface. It can be a wooden or metal skirting floorboard of your choice. If the floor is to be glued, it can be 10 mm thick expansion cork. The variety of wood is irrelevant here.
