Our roof Lanterns up-stands are manufactured from GRP (General Reinforced Plastic). They are constructed to a high thermal specification which includes a 45mm core of Polyurethane insulation.
The 4mm toughened double glazed safety Glass Argon filled units are double sealed with Silicone in the workshop. They are then further sealed on installation by fitting an external cosmetic trim around the top edge after the base has been fixed in place and sealed by the installer.