Ideal to achieve wider panels whilst exceeding building regulations for thermal efficiency without having to invest in triple glazing.
Double glazed 1.0W/m²K centre pane U-Value = Overall frame and glass 1.6W/m²K.
This system accommodates a glazing unit of 28mm or 30mm.
Acoustic performance tested at Rw=36dB. Further upgrades available.
Maximise your opening with panel widths up to 1,100mm and 3,500mm maximum panel height for narrower panels. A sliding post can be introduced at the running carriage position to offer greater balance to the doors in extreme situations. This enables us to provide larger panels and greater openings than anybody else. This is introduced for inward opening sets, heights over 2,700mm, panel weights over 75kg and seven panels or more folding in one direction.
Choice of 3 thresholds
Weathered track with double rebates offering peace of mind even in the most exposed of locations. One of the only bifold doors that can offer a double rebates on the bottom track which is why we achieve enviable weather test results ensuring that the outside is kept outside. On outward opening doors the internal finished floor can be level with the top of the track and then the step down to the outside can be as small as 3cm.
Low level track with single rebate low level Doc M compliant track recessed in to the floor with a single rebate. The floor on the inside and outside can be at the same level with the track in the middle sloping up only 14mm. This provides a single rebate for the doors to close tight against which is more weather tight than the flush track.
Non weathered flush track, Doc M compliant track recessed in to the floor with no rebates. Using a twin brush pile and a nylon strip for a virtually seamless connection between inside and outside. Whilst this is a very subtle detail it is recommended for a sheltered area only as there is not a continuous seal and reduces the weather rating with no guarantee against wind and water ingress which is a compromise for this contemporary look. A slope away or drainage channel is then recommended on the outside to prevent any water ever pooling up against this track.
A sill section with varying projection options can be used below any of these tracks. Please see downloads for the section details.