UPDATE: We have moved to bigger, better offices with showroom facilities in Watford! Our Eastcote office is still open by appointment only.  

Ruislip Windows and Doors Ltd. Installers of double glazed windows, doors and conservatories.


Front doors, back doors, double doors, bifold doors and sliding doors

Offering sleek narrow profiles and slim sight lines, aluminium doors can make a real difference to the look of your property.

Aluminium is lightweight, strong and regarded as one of the most sustainable building materials available, being almost 100% recyclable. This inherent strength means that the security of your home is improved, there is no need to worry about warping or rust, and it is almost maintenance free.

Choose from a vast array of colours to suit your home, including a dual-colour option. We offer a variety of aluminium door systems, each providing robust performance and expert design, including ALUK, Crown, Alitherm Heritage, Architect Aluminium Doors and our Reynaers premium range.


Available in single and double door configurations, our entrance doors offer a complete range of glazing formats and include several added security features, including multi-point locking mechanisms. Available in a wide variety of colours, finishes and formats to best complement your home.

  • Complete range of glazing, panel and hardware options available,
  • Accepts a full range of restrictors and access control devices,
  • Available as a standard door option or with PAS 24 upgrade,
  • Multi-point locking mechanisms for enhanced security.
  • Cloaking feature conceals lock and prevents any access to locking points,
  • Single or dual colour options, polyester power coating and anodised finishes,
  • Can easily be combined with our aluminium window and door systems for a seamless look.

For further details and individual product specifications on our aluminium door range, please see our Brochures and Videos page.

Crown and AluK aluminium doors


Perfect for both the traditional and contemporary home

The Alitherm Heritage ranges were designed specifically to meet the requirements of refurbishment and renewal projects, particularly in sensitive planning areas. Featuring slim, thermally-broken profiles, Alitherm Heritage windows and doors are available in a number of formats, including fixed-pane, sash, top-hung and side-hung casement, pivot and tilt and turn. These different options may be installed in a combination of horizontal modules, which are stacked using coupling options to form a multi-part window which can be installed both as an internal and external window and door system.

Crown and AluK aluminium bifold doors


Probably our most popular aluminium door, our bifolds deliver outstanding reliability, performance and design every time. Our range of bifold doors enables you to expand your living space by opening up wide expanses of your external walls to your outside space, whilst at the same time keeping the weather out and the heat in during cold months. Built to your needs, our doors offer you a bespoke solution every time, from the configuration of the doors to the handles, accessories and colour.

  • Wide range of configurations available including corner options,
  • Tested to PAS 24 for enhanced security,
  • Continuous hinge for a seamless finish and prevention of fingers becoming trapped during operation,
  • High performance glazing and design with minimal profiles for a modern contemporary look,
  • Single or dual colour options, polyester power coating and anodised finishes,
  • Can easily be combined with our aluminium window and door systems for a seamless look.

For further details and individual product specifications on our aluminium bifold door range, please download our Crown and ALUK brochures.

Crown and Aluk aluminium sliding doors


Engineered for strength, stability, performance and aesthetics, these wide opening aluminium sliding doors let you enjoy the best views and, with our strong yet slim frame design, the light floods in too. With a higher glass to frame ratio than bifold doors, our aluminium sliding doors are ideal for smaller, more limited spaces where bifolds may not be a practical option. or if you want to maximise your views without any visual interruption.

  • A+ energy rating for excellent thermal efficiency
  • Slim frame for better sight lines
  • Stainless steel track and wheels giving easy glide operation
  • Integral air vent for improved ventilation
  • Single or dual colour options, polyester power coating and anodised finishes,
  • Can easily be combined with our aluminium window and door systems for a seamless look.

Inline sliding doors from ALUK

The ALUK range of inline or lift and slide premium aluminium doors offers high performance complemented by stunning design, adding a modern and stylish look to your home, Combining unique system design with a range of configurations including up to six panels with four sliding, they will enhance your home whilst keeping the weather at bay.

For further details and individual product specifications on our aluminium sliding door range, please download our Crown and ALUK brochures.

Bifold or sliding doors - which ones should I choose?


Great appearance and advanced performance mean inevitable demand for a modern and sophisticated door system full of benefits. Both our bifolding and sliding door systems have superb aesthetics and excellent performance. So which one should you go for?

  • Bifold doors can open up about 90% of the aperture, really opening up the room to the garden. Sliding doors by comparison will typically open up between 50% and 65% of the aperture.
  • For ventilation purposes, the sliding door offers the most flexible solution with the ability to open the door just as far as necessary to make the room comfortable. The bifold door’s flexibility will depend on its design, but often opening a door leaf is the minimum you can do to let some fresh air in.
  • If having an uninterrupted view is important, then a sliding door may be a better option. The bigger door leafs with large panes of glass give more of a panoramic view than a bifold door that has several narrower door leafs, each with a frame around them.
  • With the bifold door, you can choose to have all the door leafs stacking to the left or the right, or you can choose to split them so some stack each side. When making these decisions, it is worth remembering that the doors require some clear space around them in order to open, and you don’t want to be moving furniture or plant pots every time you open the doors.
  • The number of door leafs will usually be dictated by the size of the opening, but it is worth considering the benefits of choosing a design with a single access "traffic" door. Found on designs with an odd number of door panels, the traffic door is a single door that can be opened without unlocking the rest of the door panels. Operating just like a normal back door, this is convenient for when you just want to nip out into the garden quickly.


  • For aluminium doors in general, including bifold and sliding doors, download our ALUK and Crown brochures.
  • For contemporary aluminium entrance doors, download our Architect Aluminium Collection brochure.
  • For steel replacement aluminium windows and doors, visit our Alitherm Heritage page.
  • For our Reynaers Premium aluminium range visit our Reynaers page.
  • Check out our full range of aluminium doors on our Brochures and Videos page.
  • To see exactly which products are Secured by Design accredited, see the SBD website for member companies.
  • Discover the Ruislip Windows' blog and check out all our door articles.
  • Feel free to contact us at any time to discuss your requirements in more detail.
Installers of Sapa Crown, Kommerling, AluK, EcoSlide, Reynaers, Rehau, Hurst, Fensa and Certass registered.

Ruislip Windows and Doors Ltd

Unit 10 Metro Centre,

Dwight Road,

Watford, Hertfordshire

WD18 9SS

Tel: (020) 8868 1133   

Email: office@ruislipwindows.co.uk

Eastcote Office by appointment:

218 Field End Road, Eastcote, HA5 1RD.

© Ruislip Windows and Doors Ltd

Registered in England: 03054680

Fensa: 15058

Certass: TRR14010

Website by Michelle