OPT-Derby Aluminium Sliding Doors

The OPT-Derby Sliding door is one our most popular products. It is an excellent all round aluminium sliding door system. It has a new improved central mullion with a slim sightline between glass panes of just 47mm – and still able to span large areas wtih panels over 2500mm wide & up to 3000mm high!

Manufactured bespoke to your exact requirements, this versatile sliding door can be used on any project to add light and space, with multiple tracks to open up large areas to the outside, without compromising your view.

For more technical details & specification please see below…


The Derby sliding doors combine a competitive price point with an excellent specification and they are a definite favourite with our customers!

We manufacture our Derby aluminium sliding doors along with the Ascot Lift & Glide doors and other windows & doors in Snetterton, Norfolk, and we can also survey & install for you around the East Anglia area.

General Features / Specification

Suitable for residential & heavy duty applications
Maximum weight limit of 150kg per panel
Doors available in large panel sizes – over 2500mm wide and up to 3000mm high
Twin and triple tracks with multiple sliding panels to open large spaces
Typical sightline of just 47mm
Typical overall U Value of 1.6W/m2k
Air Class 3, 600 Pa – equivalent to 70mph winds
Wind Class AE, 2400 Pa – equivalent to 142mph winds
Water Class 7a, 300 Pa – equivalent to 50mph winds and water being pulsed at the frames under pressure.
Full complement of doors, windows and roofs to suit

Twin track outer frame with a depth of 120mm allowing for 50% clear opening.
Triple track outer frame with a depth of 180mm allowing for 66% clear opening, and up to 6 panels in total, sliding 3 to each side for an impressive opening to transform your property.
Option to install a triple track system with front faced fixed frame, so 4 panels in total which gives you 75% clear opening
Standard frame colours, black (RAL 9005 matt), Anthracite grey (RAL 7016 matt) & white.
Dual colour option – suitable for twin track only
Handles are available in black, white, silver anodised and anthracite grey with upgrade to stainless steel handles available.
Full range of other RAL colours are also available


Multi-point lock on master door
Interlocking profile on sliding panels
Anti-lift blocks on all panels
Internally beaded so that the doors can only be glazed and deglazed from the inside AND glass can easily be replaced in the event of breakages

If you are also considering a folding or ‘bifold’ door system, please click here to see our Lincoln bifolds or you can come and visit our showroom and see them both for yourself!