High-strength extruded polystyrene thermal insulation products can be used to insulate floor structures. Regardless of the function and construction of the building, they can be inserted above or below the ground bearing concrete slab.
Thermal insulation placed beneath the concrete slab is continuously exposed to intensive stresses and load caused by:
- daily use (movement of vehicles, forklift trucks, weight of high shelved racks, machines, industrial equipment)
- static load (load transferred from adjacent building structures)
- dynamic load (starting, braking, vibration)
- mechanical load generated during construction phase
Irrespective of the type of load, the best thermal insulation option for industrial floors can be chosen from among the FLOORMATE™ 300-AP, FLOORMATE™ 500-AP or FLOORMATE™ 700-AP products. Each of the three options guarantees excellent thermal insulation, high compressive strength and stability during the foreseeable life of the building.
FLOORMATE™ XPS extruded polystyrene boards are suitable for the thermal insulation of floors:
- concrete slabs placed between strip foundation and pier foundation
- industrial floors exposed to excessive load (shelved racks in warehouses, forklift trucks, cargo vehicles)
- airport hangars when laid directly onto compacted gravel or sand bed or on a blinding layer of concrete
The manufacturing process for extruded polystyrene (XPS) plates produces a homogeneous, closed-cell material structure with a smooth surface skin (the extrusion skin) which offers:
- permanently high insulation co-efficient
- water and frost resistance
- high strength
- high elastic rigidity
- high resistance to damp diffusion
ORDER OF FLOOR LAYERS
Positioned below the concrete slabs, thermal insulation boards become integral components of the load bearing structure. Due to their high strength, permanently high thermal insulation coefficient and resistance to moisture and frost, FLOORMATE™ products enable the construction of any required floor structures.
To determine the load bearing capacity, under permanent and useful loads, of a floor structure containing the thermal insulation layer, use the value of compressive creep related (design load), assuming 2% compression, during 50 years).
The volume of steel reinforcement to be integrated into the concrete slab (considered a load distribution structure) should be calculated in cooperation with a structural engineer.
PERMANENT LOAD COEFFICIENT
The nominal compressive strength values of the boards should not be used for supporting structural calculations, however they can be used for making strength comparisons and classification. 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).
To allow for expansion, an additional void of up to 150mm may be required and will need to be confirmed by a structural engineer.
FLOORMATE™ thermal insulation products should be laid in an offset binding, directly on a compacted gravel bed or a thin blinding layer of concrete, complete with sand levelling if necessary.
The boards can be cut to size with heat cutter, knife or small-tooth saw. The cut surfaces can be fitted together precisely.
PROTECTION OF INSULATION
When the thermal insulation boards are laid on top of the damp proofing membrane, they also provide mechanical protection during the construction phase. This role is particularly important during the installation of steel reinforcement in concrete.