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ClayTec HFD Internal

Product Information

Interior insulation of timber-frame and solid exterior walls.


Wood fibers made of wood from responsibly managed forests, white glue for layer bonding.

Building material values

Bulk density approx. 160 kg/m3, compressive strength ≥ 50 kPa, nominal value thermal conductivity 0.040 W/mK, design values thermal conductivity: D: 0.040 W/mK, AT: 0.042 W/mK, CH: 0.038 W/mK, sd thickness = 40 0.20 m / thickness = 60 0.30 m / thickness = 80 0.40 m. Fire behavior according to DIN EN 13501-1: E

ClayTec HFD Internal

Wood fiber insulation board for interior insulation of timber-framed houses and all other historical buildings. The ClayTec HFD interior insulation board is glued locally into a clay plaster levelling layer or fixed with clay adhesive and reinforcing mortar. The soft boards decouple deformations of the structure from the interior plaster. They are inexpensive and suitable for many types of exterior walls.

Delivery form, coverage

Stacked and shrink-wrapped on pallets.


Store in a dry and well-ventilated place, not under plastic. Carefully protect from moisture and condensation during transport and storage.
Please note: As of production date 10.12.2022, ClayTec HFD is printed on the sanded, room-side surface. Please plaster this side only! For production dates prior to 10.12.2022, the unprinted side must be plastered (recognizable by the date stamp on the panel).
Insulation board with tongue and groove. W= 380 mm, L= 1.200 mm (covered area 365 x 1,185 mm= 0.43 m2), D= 40, 60, 80 mm.

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