ThermScreed insulating floor screed.

ThermScreed is a high-performance, lightweight insulating floor screed developed to enhance the thermal efficiency and moisture management of solid floor constructions, particularly in retrofit, refurbishment, and heritage-sensitive projects where conventional insulation methods may be impractical.

Formulated using a blend of expanded mineral aggregates (such as perlite) and a lime-based binder system, ThermScreed provides a structurally stable yet highly insulating screed layer that can be applied directly to prepared substrates. Its low density and microporous structure significantly reduce thermal conductivity compared to traditional sand–cement screeds, helping to limit heat loss through floors and improve internal surface temperatures.

A key characteristic of ThermScreed is its vapour permeability, allowing moisture to migrate through the screed and evaporate naturally. This makes it particularly suitable for solid floor constructions without damp-proof membranes, as well as older buildings where maintaining the hygrothermal balance of the structure is essential. By avoiding the trapping of moisture, ThermScreed can help mitigate issues such as rising damp, condensation, and floor-related mould growth.

ThermScreed is typically installed as part of a breathable floor build-up, and can be used in conjunction with compatible finishes such as lime-based toppings or breathable floor coverings. Its lightweight nature reduces imposed loads on existing structures, while its adaptability allows it to accommodate uneven or irregular substrates, common in refurbishment scenarios.

Suitable for use in residential, conservation, and light commercial applications, ThermScreed offers a practical alternative to rigid insulation boards and dense screeds, particularly where floor build-up depth, substrate condition, or moisture movement are key design constraints.

Overall, ThermScreed provides a holistic floor solution, combining insulation, moisture regulation, and substrate levelling within a single material, supporting the delivery of energy-efficient, breathable, and fabric-compatible floor systems.