Floor insulation can be carried out using materials such as polyurethane foam, aminoplast (injection foam), or blown insulation wool.
Various insulation materials can be used depending on the floor construction. Closed-cell polyurethane foam is dense and airtight, making it ideal for achieving high thermal performance. If you choose blown insulation such as mineral wool, cellulose, or wood fibre, you will benefit from excellent sound insulation.
When insulating floors between the ground and upper levels, the same requirements apply as for intermediate floors, meaning similar insulation materials can be used.
For older floors, effective insulation solutions are available without removing the existing floor finish, but it is important to consult professionals. In cases where the floor covering is worn out, it is recommended to remove it and insulate the floor using blown insulation or polyurethane foam, depending on the required insulation performance and moisture behaviour.
In older buildings, excess moisture from the ground is a common issue. Therefore, choosing the right insulation system is essential to ensure long-term durability.
If the wooden structure is stable, larger gaps can be filled with polystyrene beads bonded with flexible injection foam. If the structure is unstable, it should be removed, insulated with polystyrene, and finished with a concrete layer.