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Gypsol HTC Thermal Screed

Gypsol HTC is a screed specifically designed for use with underfloor heating and cooling systems. It may be used with conventional heat sources as well as with renewable technologies. It is not pipe specific and is suitable for use with any underfloor heating system and in any type of construction, subject to suitable engineering. It can be used over timber floors, Lewis decking, and more traditional concrete and masonry systems as well as most other substrates. Suitable for both new build and refurbishment projects, Gypsol HTC offers an environmentally friendly screed to help improve the sustainability criteria of the project. It can be used to thinner depths than conventional screeds, requiring just 20 mm minimum cover to pipes, subject to substrate suitability. Gypsol HTC is suitable for use with all types of floor covering, and is compatible with the Gypsol Rustique Sealer, and is independently tested to ASTM1530.

General information





Specifically designed for use with underfloor heating and cooling systems, compatible with a range of substrates, ergonomically friendly installation, protein free, thin application thickness


Anhydrite binder, sands, water

Uniclass 2015
Pr_35_31_06_72 Ready-mixed self-smoothing calcium sulfate screedsPrimary

M13/110 Proprietary trowelled levelling screeds

M13/120 Proprietary self smoothing levelling screeds

M13/35 Unbonded construction

M13/40 Floating construction

Specification data - Ready-mixed self-smoothing calcium sulfate screeds
Product Reference

Gypsol HTC High Thermal Conductivity Screed

Additional requirements


Gypsol Rustique Sealer

Standard product features

Technical characteristics:

  • CO2 emissions: <2.0 kg/m² at 40 mm deep.
  • Recycled content: Binder – 98%, screed mortar – >36%.
  • VOC: Zero.

Application (minimum depth):

  • Bonded: 25 mm.
  • Unbonded: 30 mm.
  • Floating: 35mm domestic, 40 mm commercial.
  • Acoustic: 80kg at 40 mm.
  • Cover to conduits: 20 mm.

Gypsol screeds are suitable for use on most substrate types.

Digital objects
PlatformCompatibleVersionCertified to
IFC2X3 3 1.3
Revit 2016 4 2.0
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