Bottom hung bifolds

George Barnsdale has launched its new bottom-hung bifold door range, designed to overcome the constraints associated with hanging from timber beams and non-standard openings.

The growth in timber framed properties in recent years and the continuing demand for bifold patio doors for such projects has caused a few headaches for developers and builders, the company said. This is mainly due to the challenges of hanging heavy weights from timber beams which causes deflection, preventing the doors from opening properly.

The new system developed by George Barnsdale for a leading oak frame manufacturer is designed to overcome this by transferring the weight to the floor with special bottom rolling mechanism instead of the traditional top roller mechanism.

Using the highest quality mechanism that incorporates guards to push away grit, and articulated carriers to compensate for imperfect openings, the new bottom-hung bifold range from George Barnsdale should open up architectural opportunities, the company said.

Designed for inward and outward opening, and double or triple glazing, the doorsets can be used for interior or exterior purposes. The doorset is also fully tested to BS6375 parts 1, 2, 3 and PAS24.

Technical director Hayden Darley said: “We spend a great deal of time listening to our customers, working with them to develop solutions, and the bottom hung bifold is a great example of this. We have our own on-site research and development centre that allows us to experiment with new ideas and products prior to them being third-party tested off-site.”