The Conservation Rooflight®

The original Conservation Rooflight® remains unsurpassed in high spec design with a traditional look.  It combines modern thermal efficiency with all the authentic design features to retain the character and value of any heritage or listed property, meeting all current building regulations.  The Conservation Rooflight® is frequently featured on award-winning landmark buildings and is used on a number of National Trust & English Heritage properties.

Wide range of stock items available. Ask about our Made to Measure service.

History in a new light

Designed to faithfully replicate the Victorian cast iron roof window whilst benefiting from the latest technological advances in thermal performance. Its design retains the character and value of any heritage building or Listed property. 

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Key features

  • Meets current building standards, satisfying conservation officer, English Heritage and National Trust requirements.
  • Simple and cost-effective way to introduce more light.
  • Designed with slim clean lines and a low-profile to match the roofline, enhancing a building’s aesthetics with linking bars for every size.
  • White internal linings that sit flush to the reveal.
  • Achieves whole-unit U-Value of 1.5Wm2K in accordance with EN ISO 10077-2:2012.
  • Top hinged opening (as opposed to centre-pivoted) for an authentic appearance and to maximise the space below.
  • Straight forward to install.
  • Available in sixteen standard sizes and a Made to Measure service also available.
  • Designed and built in Oxfordshire.

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    Technical Information & Downloads

    Sizes & Prices Between the Rafter

    Installation Overview

    Roller Blind

    Sizes & Prices On the Rafter

    Opening Options

    Flashing Kit

    Pleated Blind

    NBS Specs

    NBS Specs

    Installation Guide

    Installation Manual Between the Rafter

    Building Regulations

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    Technical FAQ

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    Terms & Conditions

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    Which installation do I need?


    When we refer to rooflight sizes, we use the structural widths and lengths that the rooflight will be fitted in to. The structural dimension is the clear opening that is required within the roof structure in order to install the product directly on to the rafters (main structural members making up the roof). We call this an ‘On The Rafter Installation’ or a ‘Proud Installation’. The rooflight height may be a little greater than the roof build up, so the rooflight may sit slightly proud of the roof level, however this still results in a beautiful external aesthetic for most roof types, especially traditional builds.


    If you have a very low-profile roof build-up, like slate, the rooflight may sit noticeably higher than the roof level when installed on the rafters. If you want a completely seamless aesthetic externally, you could install ‘Between the Rafter’, to achieve a completely ‘Flush Installation’, meaning you can’t see the rooflight frame at all from the outside. This means that the framework for the rooflight to be installed on sits within and below the rafters. This type of installation requires a bigger structural opening to accommodate the whole rooflight.

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    on the rafter


    On the Rafter Cold – Clay

    On the Rafter Cold – Clay – FK

    On the Rafter Cold – Pantile

    On the Rafter Cold – Sarking

    On the Rafter Cold – Slate

    On the Rafter Cold – Slate – FK

    On the Rafter Warm – Clay

    On the Rafter Warm – Clay – FK

    On the Rafter Warm – Pantile

    On the Rafter Warm – Slate

    On the Rafter Warm – Slate – FK


    Between the rafter


    Between the Rafter Cold – Slate

    Between the Rafter Warm – Slate

    Between the Rafter Cold - Slate - FK

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