Glazing, Frame & Upstand

Glazing, Frame & Upstand

Learn how our rooflights are constructed, how the components work, and how each element works together to create world-class experiences.
Require further assistance? Our Daylight Experts are always on hand to help.
Upstand & Performance

Upstand & Performance


Vario by VELUX rooflights come with a wooden upstand that uses EPS Foam to keep homes warm. It’s easy and safe to install, great for most flat roofing materials (e.g. the burning of roofing felt or the application of rubber roofing materials), and is supplied in either 150 (minimum requirement) or 300 mm, depending on project requirements. We provide a 10 year VELUX Guarantee on the upstand and glazing unit. 

Doublet Gaskets

A pre-fitted gasket system comes with all Vario by VELUX rooflights, ensuring a 100% tight and secure connection between the frame and upstand construction. Some alternative glazing products are fixed to the roof construction or to an upstand built on-site using adhesive silicone or similar – this installation procedure increases the risk of condensation and potential leakage. 

Vapour Barrier

A rooflight should always include a vapour barrier. Vario by VELUX do not supply this and we recommend this is sourced separately. 

Glazing & Frame

Glazing & Frame


All our glazing units come with the option of double or triple glazing. Double glazing has the benefit of maximum daylight penetration, while triple glazing reduces the amount of heat and light that can enter through the glass, which helps regulate indoor environments. 
All glazing comes with a laminated inner pane which enhances safety and mitigates the risk of UV rays fading interior furnishing and surfaces. The laminated glass is constructed using two glass sheets with a very thin layer of polyvinyl butyrate (PVB) between them,  providing the highest quality and durability. 

Each glazing unit comes with warm edge spacers to guarantee thermal breakage and energy efficiency. 

Silk Screen

The Vario by VELUX glazing units also come with a 115 mm black silk screen which is designed to protect the pre-fitted gasket system from the sun and to enhance the overall aesthetics of the product.  


Vario by VELUX frames are built using lightweight aluminium. They’re highly durable, strong and selected for their excellent corrosion resistance, joint strength and malleability. Thanks to Corner Keys, the frame provides a smooth surface and a seamless connection. Each frame is treated as standard with either RAL 9005 Jet Black or RAL 7043 Traffic Grey polyester powder coating to enhance durability, as well as weather and corrosion resistance. Specifiers can customise the powder coating with a variety of special colours. 


When manufacturing the frame, we use a highly durable and weather resistant adhesive silicone to fix the glazing unit to the aluminium frame. The silicone we use is also regularly used in the structural façade glazing industry when building skyscrapers.


Contact us

Contact us

Our Daylight Experts are here to help you with information regarding positioning, dimensions, specification and more. 

by telephone 01592 778246

by e-mail:

or by using our contact form

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Design with daylight