Mk 1 Base Units, manufactured from strong rigid glass reinforced plastic, these units are designed for fast and easy installation. Fully moulded bottom with bracket attached in one piece with a 12mm mahogany plywood window board. PVC skin can be bonded onto top surface to create a strong window board.
This revolutionary development in GRP closed tool moulding, allows us to make a complete double sided finished base with no weak seams or joints. This is the first base unit ever to be made by this process. Fully insulated with polyurethane foam this base unit forms your internal & external sills. Comes complete with fixing bracket and GRP bracket cover