PAROC 10 cm Insulation (Roof and Floor Insulation)

PAROC 10 cm is a 100 mm thick stone (mineral) wool insulation used mainly for the roof and floor in sauna and wellness cabin construction. The roof and floor face a larger temperature difference against the exterior than the walls, so they require a thicker insulating layer to maintain a stable cabin temperature. The material is produced by melting basalt at high temperature and spinning it into boards with an open yet stable fibre structure. Stone wool is non-combustible, and its insulating properties do not change under prolonged exposure to heat from inside the sauna. At the floor, the boards are combined with a wearing layer that withstands mechanical load and moisture.

Advantages of PAROC 10 cm insulation

• Lower heat loss through the roof and floor: The greater insulation thickness reduces heat loss exactly where the temperature difference against the exterior is highest.
• Class A1 non-combustibility: The material is suitable for direct contact with structural elements near the heat source.
• Stable floor temperature: The insulation limits the transfer of cold from the ground or foundation slab into the cabin interior.
• Long service life without loss of properties: When installed dry, stone wool retains its shape and insulating performance throughout the structure’s service life.

Which stone wool thickness goes where

A sauna cabin structure does not use one insulation thickness for everything. What decides it is the temperature difference between inside and outside at that point in the structure and the load the layer has to take.

The vapour barrier belongs with the insulation

Stone wool on its own does not stop moisture. Inside a sauna cabin a reflective vapour barrier is therefore fitted on the warm side of the insulation to keep water vapour out of the insulating layer. If the vapour barrier is missing or damaged, the vapour condenses in the insulation, the insulation loses part of its performance and the moisture stays in the structure. Taping the joints and junctions is therefore just as important as the thickness of the wool itself.

Related terms: PAROC 5 insulation, Ventilation, Metal roofing, PVC flooring.