top of page

ClayTec HFA Maxi

Product Information

Wood fibreboard (HFA) for planking wood and metal stud constructions in interior areas. For interior walls and facing shells DIN 4103-1, installation area 1 or 2, for ceiling and roof surfaces. On surfaces of water exposure class W0-I according to DIN 18534-1, e.g. in bathrooms (except shower areas) and domestic kitchens. With reinforcement layer, substrate for YOSIMA Clay Designer Plaster or ClayTec Clay topcoat fine 06 with CLAYFIX Clay Paint as well as for other ClayTec clay plasters.


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

Building material values

Compressive strength ≥ 150 kPa. Bulk density approx. 250 kg/m3, thermal conductivity value 0.05 W/mK, µ 5. Heat storage: Cp 2.1 kJ/kgK, 13.1 kJ/m2K. Fire behaviour according to DIN EN 13501-1: E
For stability according to DIN 4103-1, sound insulation of walls and facing shells as well as building material class and fire resistance class of walls and ceilings, see ClayTec guideline ecological drywalls in the system.

ClayTec HFA Maxi

Wood fiberboard (HFA) for planking wood and metal stud structures of interior walls, facing shells, ceiling and roof surfaces. ClayTec HFA maxi boards are lightweight and breathable. The large format of 125 x 187.5 cm ensures efficient work, it is matched to the 62.5 cm drywall grid. With the inexpensive large construction panel, ecological drywall construction becomes affordable for everyone! Clay adhesive and reinforcing mortar is suitable for the reinforcing layer. In addition to this product sheet, the ClayTec guide ecological drywall in the system applies.

Delivery form, coverage

Welded on pallets á 45 pcs.


125 cm x 187.5 cm = 2.34 m2, D = 25 mm. Weight approx. 6.25 kg/m2 = approx. 14.6 kg/board

bottom of page