• Manufactured with pinewood, vacuum impregnated and coated twice with acrylic varnish,
• Suitable for roofs with pitches between 20° and 90° (complete with flashing).

Top windows are windows which are triangular FDL, or arched FBL. They can be installed on the join above any roof window. Top windows are non-opening. They can be used to create original shapes, additional lighting and an attractive interior design. Use of top windows gives buildings a strikingly distinctive character.