Sydney Woodworkers Hinge off Hinge Folding Concertina Doors can be an ideal solution for smaller openings to restrictive patios and thorough fares where the ability to stow the doors flat against the external wall is an advantage. Our unique integral spring loaded bottom roller supports reduce susceptibility to sag and improves stability.
IMPORTANT INFORMATION: Hinge of Hinge Systems are not technically equivalent to overhead track multifold systems. They are prone to sag over time and more susceptible to problems to movement in the surrounding floors or walls. Purchasers are cautioned that the bottom roller system minimises rather eliminates sag.