At A1 Garage Doors, all our doors are constructed using interlocking 77mm x 18mm thick (including radius), twin walled aluminium slats and filled with CFC-free insulating foam.
This combines strength whilst helping increase energy efficiency with a typical U value of 5.2 w/m 2K. The doors can easily span an opening up to 5400mm wide and come complete with a heavy duty weather seal to the bottom section.
