As demand grows for excellent energy performance, there has been increasing emphasis on providing thermal insulation to the underground parts of buildings, ie the foundation structures, including strip foundations or slab foundations built beneath the entire building.
As well as reducing downward thermal flows, insulation also satisfies requirements for thermal comfort and for the protection of buildings.
Floor temperatures should not differ from the heated room air temperature by more than +/- 3oC, and condensation should be prevented both on the floor surface and inside the floor structure.
FLOORMATE™ thermal insulation products have demonstrated their proven performance in places exposed to humidity.
When designing and selecting thermal insulation materials to be in direct and permanent contact with the slab foundation beneath an entire building, ensure lasting and efficient operation by choosing the appropriate FLOORMATE™ product: FLOORMATE™ 300-AP, FLOORMATE™ 500-AP or FLOORMATE™ 700-AP.
Using FLOORMATE™ products for the thermal insulation of reinforced concrete slab foundations has the following advantages:
- long-lasting thermal protection, despite the permanent presence of moisture
- no damage to materials with subsequent extensions and compaction
- no ground water pollution
Integration of the XPS thermal insulation in the slab foundation built beneath the entire building will ensure anti-freeze protection of outside segments above the frost-line, in addition to ensuring thermal insulation of floors inside the building.
FLOORMATE™ thermal insulation in the slab foundation beneath the building should be laid only on precisely prepared and carefully compacted and smoothed substrate.
The thermal insulation should be placed beneath a load-bearing structure only following a sufficient static loading calculation.
To determine the capacity of the floor structure (containing the thermal insulation layer) to withstand permanent and useful loads, use the value of compressive creep (design load).
FLOORMATE™ thermal insulation products should be laid in an offset binding, directly on the compacted gravel bed or a thin blinding layer of concrete, complete with sand levelling if necessary.
To prevent potential chemical interaction of softening materials (eg PP felt or geotextile) with XPS a separation layer can be inserted between the waterproofing layer containing these softening materials (e.g. soft PVC) and the XPS layer. A requirement to insert a separation layer should be declared by the manufacturer of the waterproofing membrane.
The tongue and groove edge profile of FLOORMATE™ ensures it can be placed without creating thermal bridges.
FLOORMATE™ must be protected from temperatures higher than 80oC (melting heat, welding).