Non-retractable blinds were originally designed as a robust form of sun screening for museums and art galleries but have now found a domestic application with the growth of the conservatory market. Aluminium or timber slats are mounted on nylon clips that are located on aluminium support racks. The system is very versatile and can be cut to fit virtually any shape of glazing. It is particularly suited to high-level windows or where control access is difficult. It also has an application as an adjustable suspended ceiling. Aluminium slats are available in 25mm to 90mm widths and timber in 50mm. There is also a version for audiovisual purposes using an interlocking 90mm slat for a higher degree of light exclusion.

Mounted externally, using a reinforced 80mm slat, considerable benefits in solar heat rejection can be achieved. The system is often used on commercial greenhouses to control both light and heat. When used externally, all aluminium components and sections are anodised or powder coated.

Types and operation

Manual

With either a cord tilter or gearbox with operating rod.

Electric

With a tubular motor mounted on a rack arm to a geared drive.

Components

Slats

25mm, 50mm, 80mm, 88mm and 90mm aluminium or 50mm timber.

Rack arm

Aluminium section that supports the slatting area.

Pivot arms

Nylon supports that are fitted into the rack arm and carry the slat clips.

Slat clips

Nylon clips that hold the slats.

Operating strip

Aluminium strip to connect the slat clips.

Drive shaft

Aluminium shaft that connects the rack arms to the operating mechanism.

Brackets

Stainless studding with nylon clips to the rack arms.