Epwin Window Systems has launched a new integral cill for its Stellar Aluminium slimline bi-fold door.

The sleek low sightline cill brings enhanced sightlines and is said to save 35mm of height when compared with a traditional bi-fold cill. According to Epwin, it is also uses fewer component parts and is quicker and easier to install than a separate outer frame and cill, especially on refurbishment projects.

The cill was introduced in response to customer feedback and the reaction to the innovation is reported to be ‘extremely positive’.

Stellar fabricator, Peter Adams, at Capital Windows, said: “The integral cill is a great product. It’s easy to install and offers a low-lying flush aesthetic that our customers really appreciate.”

The Stellar Aluminium slimline bi-fold door includes polyamide thermal break technology to deliver low thermal conductivity, ensuring it meets the requirements of the 2022 Part L Building Regulations with standard 28mm double glazing.

Installers are said to benefit from faster installation times with patented pre-gasketed knock-in beads that speed up glazing. There is also an adjustable patent-pending locking stile so the clearance between the lock and keep can be adjusted to take up cutting tolerances.