Reynaers Aluminium Doors & Windows

Unique aluminium window and door systems that exceed the performance standards expected in modern building design.

Architectural Glazing for Retail & Trade

If you are planning or considering large panelled or multi-panelled aluminium doors or windows for your project contact us to find out how we can help design your new project.

Our systems are available in depths of 58mm, 70mm and 77mm, with a wide choice of colours and finishes customers desire, with the performance, quality and flexibility the trade demands.

All the latest structural, thermal and wind calculations are available, as is a comprehensive suite of CAD, NBS Specifications performance and environmental data.

Bedford Bi-Folds Ltd are a ‘Reynaers at Home’ approved dealer for fabricating and installing aluminium bi-fold doors, sliding doors or windows. Manufactured to the highest standards, tested and certified to the latest standards and accreditations.

Reynaers at home


The option to choose an alternative colour internally and externally from traditional colours to bespoke colours make it possible for any homeowner to add their own personal touch. All are available in Matt, Satin or Gloss finishes.

If you know exactly what you want, fill out our S1 roof lantern order form to request a quote. 

Colours for Sheerline Aluminium roof system available from Bedford Bi-folds Ltd
Sheerline Aluminium roof system available from Bedford Bi-folds Ltd


The Sheerline Roof Lantern is fabricated from aluminium which not only makes it durable but also due to its efficient properties and ease of highly efficient recycling processes makes this one of the most sustainable materials available.

If you have any queries or questions please contact us on 01234 342669, or leave a message and we’ll get straight back to you


With innovative anti-tamper screws, enclosed glazing, security tape, glass lock combined with unique ridges Sheerline have created one of the most secure aluminium roof lanterns on the market. 

You can read more about the technical specification in our Sheerline Lantern brochure

Sheerline Aluminium roof system available from Bedford Bi-folds Ltd

The UK's most secure roof lantern - keeps the heat in and intruders out.

The S1 lantern combines aluminium’s clean lines with exceptional thermal performance and features our innovative Thermlock® multi-chamber technology to keep you and your property well insulated against the worst of the UK weather.

Design and innovation within the construction of the S1 Roof Lantern have eliminated weaknesses previously seen in other traditional glass lanterns. Features such as anti-tamper screws, enclosed anti-tamper glazing, security tape and our patent pending glass lock, alongside our unique high-security ridge end, ensure there isn’t an easy way to enter your property via your flat roof lantern.

Sheerline Video

Sheerline aluminium roof lanterns are available in a choice of 10 styles from square ‘pyramid’ designs to grander options suitable for larger ‘orangery’ style installations. Maximum sizes range from 2.4 up to an impressive 6m long, all set at a 25˚ pitch and all weather rated for the whole of the UK*. If you would like to order or request a quote please complete our S1 Sheerline form and one of our team will respond to you asap. 

Product Features

S1 Roof Lantern Technical Features:

  • 28mm glazing 1.0 U-value W/(m²K)*
  • Secure with enclosed anti-tamper screws
  • Security tape
  • Glass lock
  • ThermLock system multi-chamber technology 
  • Co-extruded perimeter
  • Hardwearing powder coating (inside and out)
  • Laminate glass upgrade

*Centre pane U-value. Subject to glass specification.

View our Sheerline Brochure brochure,  packed full of more information for you to digest. 

Please complete our S1 Aluminium Survey Sheet for any order requests.




Play the Sheerline S1 Aluminium Roof Lantern Video

It is possible to request different internal and external colours for your frame.  We offer popular colours or a variety of other RAL colours. All are available in Matt, Satin or Gloss finishes.

  • Pure White
  • Anthracite Grey
  • Jet Black
  • Cream
  • Agate Grey
  • Squirrel Grey
  • Pastel Turquoise
  • Chocolate Brown
  • Hipca Gloss White

*Subject to glass specification.
*Rated for a snow load of 1.2 KN/m2. Covering the whole of the UK up to 200m altitudes.

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