Do you have a sloped roof that limits the use of the area directly underneath the roof pitch? With our knee wall doors, you can convert that unused space into additional storage space. The Columbus knee wall doors are available in standard dimensions or as individual made-tomeasure product.
Climatic-proof system means locking technology from the field of window construction. The Designo and Quadro loft ladders lock tightly and reliably to Deventer window seals and Roto window fittings - 100% tested.
- High energy efficiency
- Durable and sustainable
- WDL ensures airtight connection from the factory
Trio installation system without foam or adhesive. The loft ladder is inserted into the ceiling opening, and the WDL creates an airtight connection to the building structure. Simply insert the mounting screws into the pre-drilled holes and tighten them with a cordless powered screwdriver - done!
- Time savings and ease of installation
- Simple, secure and professional installation
- Product quality for cover and ladder