Product introduction

Designed with incredibly narrow 55mm frame depths, the SF55i is our best-selling aluminium bifold door and ideal for standard configurations in extensions, renovations or self-build homes. The square-edged profile and slim sightlines help maximise the amount of glass and break down the boundaries between inside and out.

For more than 20 years SUNFLEX UK has manufactured specialist aluminium door systems and our range of highly engineered sliding doors offer the perfect solution for larger openings in extensions, renovations or new builds; maximising the amount of glass and breaking down the boundaries between inside and out.

Designed to be the most thermally-efficient bifold door, the SF75 offers Passivhaus standard thermal performance and is specifically manufactured to accommodate a triple glazed sealed unit, and thanks to its advanced thermal break technology it can achieve an incredibly low U-value whilst maintaining the same usability and slender appearance of the SF55s.