The Lignum Alu Flat range combines the modern look and the high resistance of aluminium on the outside with the excellent heating values of wood on the inside – in a natural, environmentally friendly manner.
It attains peak heating values of up to Ud 0.91, which makes an enormous difference compared to conventional aluminium doors, with approx. Ud 1.5.
NEW! The Lignum Alu Flat wood/aluminium exterior door is also available for flush fitting with the frame on the outside.