Bi-fold doors run on rollers at the sill ensuring they don't pull the bi-fold door lintel down and therefore they work smoothly over the long haul. Top clearance allows up to 6mm of lintel movement.
Series 548 bi-fold door transoms have a narrow profile. This allows a designer to include 2100mm-high doors plus an overlight in a standard 2400mm-high opening. (Opening sashes as well as fixed overlights are available).
Very deep water ‘head’ at the bottom. The bigger this measurement - from drainage hole to the inside leg - the more assured the water drainage in wet or stormy conditions.
The Vantage Series 548 High Performance Bi-fold door features an unusual design embellishment - extra wide top and bottom rails that give the door the chunky appearance of traditional timber designs.
The centre hinge between bi-fold door panels has a built-in handle to allow the home owner to easily pull the panels back into the closed position.