Polystyrene for dry flooring UHPD (STIROTERMAL DRY)

Product detailed description

Dry underfloor heating systems in industrial buildings, production halls and heavy-use environments require insulation solutions that maintain thermal performance while supporting mechanical loads. This board is engineered for dry underfloor heating systems where the heating pipes are embedded in a screed or directly adhered to the surface. It provides a stable base for pipe layout and ensures even heat distribution. The 30 mm height accommodates standard pipe diameters and allows for sufficient insulation depth to reduce heat loss toward the subfloor.

The board is particularly suited for installations where high compressive and bending strength are essential, such as in warehouses, automotive repair garages and manufacturing facilities. Its EPS core ensures low thermal conductivity and dimensional stability at elevated temperatures. The clean dimensions of 1200 x 600 mm allow precise alignment with modular pipe systems and facilitate efficient coverage of large areas during installation.

Technical parameters

Installation and connection

Install the boards in a dry environment, ensuring the subfloor is level and free of sharp objects. Lay the boards adjacent to each other, aligning edges precisely to avoid gaps. The 30 mm height should be confirmed with a spirit level to maintain flatness across the entire surface. Once the layout is complete, secure the PEX-AL-PEX 16 x 2 mm pipes using clips or adhesive according to the system instructions. Ensure the pipe spacing matches the selected 150 mm or 300 mm configuration. Check that all joints are sealed and that the pipe routing does not cross structural expansion joints. Avoid overlapping boards unless necessary, and ensure the cardboard packaging is removed after unloading to prevent contamination.

Compatibility and accessories

This insulation board is designed to work with stainless steel manifolds and PEX-AL-PEX 16 x 2 mm pipes. A separation film is recommended to prevent direct contact between the insulation and the screed layer. A spreading plate can help distribute load more evenly in areas subject to dynamic loading. Related products include Separation Film 601001H and Spreading Plate UHPS. When ordering, calculate the number of 0.72 m² boards needed based on room area and add 10% for cutting waste and irregularities.

Technical background for designers

The board functions as a thermal barrier between the heating pipes and the underlying structure. The 30 mm thickness ensures sufficient insulation depth for dry systems, where heat transfer occurs primarily through conduction and radiation rather than convection. The material’s dimensional stability up to 80°C prevents warping during operation. Integration into the system requires careful calculation of pipe spacing and flow rates to achieve uniform heat distribution. Long-term efficiency depends on maintaining the board’s integrity and avoiding mechanical damage during installation or later modifications.

Service and operation

During operation, inspect the system periodically for signs of mechanical stress, such as cracks or deformations in the board. Confirm that the pipe layout remains fixed and that no movement occurs due to thermal expansion. Monitor the system for uneven heating patterns that could indicate poor insulation or air pockets. While no scheduled maintenance is required, any visible damage to the board should be repaired or replaced to prevent long-term performance degradation.

Frequently asked questions

Can this board be used with radiant heating systems other than underfloor?
No, it is specifically designed for dry underfloor heating systems and not intended for wall or ceiling applications.

Is this insulation suitable for use with heated screed?
No, it is intended for dry systems where the heating pipes are laid directly on top of the board without being embedded in a wet screed layer.

Can the board be cut to fit irregular shapes?
Yes, the board can be cut using a fine-tooth saw or utility knife. Always wear protective gloves when handling the material.

What is the maximum allowable temperature for continuous operation?
Continuous operation is permitted at up to 80°C without compromising the board’s dimensional stability or thermal performance.