Pyramid Aluminium has launched its SlimFold bi-fold door that achieves a 1.4 W/m²K U-value with standard double glazing. SlimFold offers easy clip-in beading, with a 45mm wide slimline sash and is the latest addition to the Purelight aluminium system range.

Thanks to an innovative insulated thermal break, SlimFold bi-fold doors achieve a 1.4 U-value with a Low-E argon-filled warm edge glass unit, complying with the June changes to Part L of the building regulations.

SlimFold has a ‘super slim’ 45mm sash to give a narrow 100mm meeting stile, one of the slimmest on the market. Sashes can be up to 1.1m wide and 2.5m high, to create large glass areas with minimal frames, for incredible views.

Paul Bailey, MD of Pyramid Aluminium, said: “The most impressive thing about SlimFold is that there is no compromise. Despite having one of the slimmest frames on the market, it still offers incredible thermal efficiency and security.

“We knew that installers were preparing for changes to Part L, so we had to create something which complied with this. The multi-point shoot bolt locking system also features two hooks and three deadbolts for extra security, so it is the perfect all-round bi-fold door option.”

The SlimFold bi-fold features an aluminium clip-in bead making quick work of glazing, for an easy and speedy installation. Pre-delivery assembly and inspection also saves time on site.