THE COMPLETE GUIDE
HorizonLite installation
The main reference for preparation, fitting and finishing your rooflight.
Open the PDF guideCAMBRIDGE HORIZONLITE
The installation information for our fixed frameless HorizonLite range, all in one place. Share it with your installer before work begins.

START WITH THE RIGHT INFORMATION
Read the complete PDF guide, then use the video for your roof type alongside it.
THE COMPLETE GUIDE
The main reference for preparation, fitting and finishing your rooflight.
Open the PDF guideWATCH THE PROCESS
See the HorizonLite installation video for a flat roof project.
Open on YouTubeWATCH THE PROCESS
See the HorizonLite installation video for a pitched roof project.
Open on YouTubeTHE SIZE THAT MATTERS
Choose the pair of dimensions that matches your roof opening. Every HorizonLite fits in portrait or landscape.
The overall rooflight is 100 mm larger on each side. Follow the PDF guide for the upstand and fitting details.
EITHER WAY ROUND
Portrait or landscape. The same rooflight, with the same roof opening.
The diagram shows the internal opening dimensions.BEFORE WORK BEGINS
Arrange installation with your own professional installer. We supply the HorizonLite rooflight and the information to help them prepare.
Give your installer the PDF and relevant video before the opening is prepared. Use the guide for the roof, upstand and fitting requirements.
Your selected internal size is the roof opening size. Check both dimensions, the overall rooflight size and your chosen orientation.
Check the net weight for your size and arrange suitable handling and lifting with your installer.
Yes. The internal size shown for every HorizonLite is the size of the roof opening. An 800 × 2000 mm rooflight fits an opening of 800 × 2000 mm, or 2000 × 800 mm if rotated.
Yes. The two dimensions can run either way round. There is no fixed width or length, so reversing the dimensions does not change the rooflight you order.
Start with the complete HorizonLite PDF guide. Use the flat roof or pitched roof video alongside it, depending on your project.
We supply HorizonLite rooflights. You arrange installation with your own professional installer, using our guide and videos to help them prepare.
Yes. Contact our team with your HorizonLite size or order number and we can help you find the relevant installation information.
HORIZONLITE HELP
Talk to us about your selected size or installation information.