Wood fibre board (HFA) for planking wooden and metal stud constructions of interior walls, facing shells, ceiling and roof surfaces. Claytec HFA N+F are light and breathable. The small format as well as tongue and groove ensure best workability, even impacts in the field are possible. At the same time it is very expensive, making ecological drywall construction affordable for everyone! For the reinforcing layer, clay adhesive and reinforcing mortar is suitable.