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Fully Insulated Upstand

Insulated upstand - timber with pitch

What is
an Upstand?

what is an upstand icon

Rooflights installed on flat or low pitched roofs should be fitted at least 150mm above your finished roof covering and at an angle sufficient to ensure water does not pool on the glass.

This is achieved by installing an upstand (or kerb) under your chosen roof glazing system.

What do I need to consider?

pitch of upstand

In reality an upstand plays just as important a role as the rooflight itself when it comes to air tightness, weathering and of course thermal performance.

A large number of onsite issues are the result of poorly made, poorly insulated upstands without the sufficient fall required to prevent water ingress.

Can I build my own Upstand?

Can i build my own upstand

Recent changes to Part L (Building regulations) mean that while it’s possible to construct your own upstand, you will now be required to provide evidence to show a U Value of under 0.35 WmK.


What to look for!

When creating your own upstand there are a number of things to consider.

What to look for!

When creating your own upstand there are a number of things to consider

Thermal efficiency – The upstand can often become a thermal weak spot within your build, cold bridging (caused by using solid timber) increases both heat loss and the chance of condensation within your home.

Air Tightness – The area between the underside of your rooflight and the top of the upstand is one of the most critical when it comes to both weathering and air tightness. Understand more about the importance of air tightness.

How are you planning to ensure your rooflight sits correctly on your upstand ? Silicone? Specialist glazing tape? If you are unsure please feel free to contact us.

upstand for rooflight on site | EOS Rooflights
what is the difference between warm and cold roof

Upstands Height!

150mm is the minimum upstand height for building regulations but we also have options for warm roofs.

We can offer customized solutions to meet your roofing needs with our diverse range of rooflights. Opt for a 150mm upstand for a cold roof or a 300mm upstand for a warm roof, ensuring optimal insulation and energy efficiency. Whether you’re leaning towards flat glass rooflights or lantern rooflights, our offerings provide a perfect blend of style and functionality. Elevate your living space with our advanced designs, tailored to suit your preferences.

Find out the difference between warm and cold roofs and what this means for upstands.

Benefits of an EOS upstand over one made on site?

Why have an EOS Upstand?


The core of our upstand is made of a super thermal Polyurethane meaning our upstands achieve U Values as low as 0.32W/mk.


Optional pre-installed gaskets ensure a superior seal between your rooflight and upstand.


Our unique design allows either a flat packed or fully assembled delivery. Installation takes less than 10 minutes.

Fully insulated upstand - Timber with gasket

Ask us about making your own upstand.

If you want to build you own upstand on site you will find some useful information in our latest blog;

What is an upstand and how do i build one ?

Alternatively why not add our fully assembled, building regulation compliant insulated upstand to your EOS Rooflight.

Contact our team

If you have any questions, would like a bespoke price or want to enquire about our installation service. Give us a call or drop an email:

Call EOS Rooflights today 0208 462 3557

Eamil EOS Rooflights Today [email protected]

4.83 Average

321 Reviews

David Baker

EOS were chosen as the rooflight supplier as our builder had failed to deliver the items. Rooflights were 1500mm square, something other suppliers were unable to provide. Rooflights were delivered and fitted on a Saturday morning two weeks before Christmas. They dropped onto the prepared upstands. Great service from start to finish, they knew exactly what they were talking about, the manufacturing is first class, they were local. Would we recommend them to anybody who wanted a first class product. without a doubt.

Posted 1 month ago


We have had several eos rooflights (possible 10-12) over the last 5-6 years. Every one has been as it should be. Received in perfect condition, delivered on time. And the roof-lights are well made and look perfect once fitted. Company is also very helpful if help is required. I’ve seen cheaper alternatives supplied and fitted by others but they are inferior quality. These are

Posted 1 month ago

Alison Smith

Very happy with your service

Posted 1 month ago


Very efficient sales team

Posted 1 month ago


Needed a large bespoke roof light upstand made and they managed to turn it around in a day! Great company, would definitely use them again. Thanks

Posted 1 month ago

David Kingston

Great company to deal with, made the process very simple, delivered on time and fitted perfectly

Posted 1 month ago


Easy to deal with, the pricing was great and delivery of 5 skylights was quick and stress free. One small problem was quickly resolved, great company.

Posted 6 months ago

Justin David Davis

Great product despatched and delivered very quickly

Posted 6 months ago


Great rooflights

Posted 7 months ago


Recently purchased an electric roof light from EOS. Very happy with the finished product, study and functions very well. It also looks very stylish. I received excellent customer service from EOS at all stages, they couldn't have been more helpful. Highly recommended.

Posted 8 months ago


Great Rooflights , simple to fit and swift delivery, many Thanks

Posted 9 months ago

Liam Grenander

Very professional customer support / sales team. Dealt with our roof light enquiry quickly and kept me updated on transit and delivery. Will be purchasing roof lights from them again when our projects require them.

Posted 9 months ago

Brad Lander - Bailand Construction Ltd

EOS Rooflights were knowledgable in their field, very helpful and the products (Roof Lantern and Flat glass roof lights) were of a good quality. The Roof lights were easily installed and full installation instructions were supplied for those who are installing for the first time. Would recommend.

Posted 9 months ago

A Memet

Very efficient with processing my order and delivery. I ordered a 3M roof lantern and a smaller flat roof light. Both were simple to install on my own upstands and they both look great. My only negative was the cost was a lot for what they are but I don’t think eos are excessively expensive, I think the roof lanterns themselves are what’s pricey. Anyhow I’m happy 😃

Posted 1 year ago


EOS were brilliant all through the consultation/sales process and delivery. The skylight looks great and works a treat with the electronic switch. Their after-care support was also very helpful and patient when we mistakenly thought we had an issue. Would highly recommend them.

Posted 1 year ago

Jonathan Tregidga Buyer at Legacy

As a company we have used EOS for some time. We use the EOS Rooflight Flexi Lid product a lot and also the EOS Smoke Vent Rooflight AOV on our projects. We cannot fault the company for the service, communication and value for money.

Posted 1 year ago


Excellent products, great customer service and post sales support! Unfortunately the courier damaged our roof lights slightly, however EOS went above and beyond to rectify! Special mention to Natalie O’Hara in ops, she was so helpful, prompt and a real pleasure to deal with! Highly recommend EOS!

Posted 1 year ago


Great delivery, great product. Really helpful customer service to organise the delivery of the rooflight

Posted 1 year ago


My Eos rooflight turned up on time as always, simple to install and looks great, throws so much light into what was a dark space, the quality of the rooflight is amazing, I will continue buying from Eos in the future,

Posted 1 year ago

Clive Woodford

The rooflights are a key feature externally of the property as they are prominent on the flat roof. They are angled by 15 degrees to allow the south facing sun to enter the house maximising natural light and also utilising any solar gain. The majority are triple glazed, with a couple of larger opening lights being double glazed. Internally they provide so much light and the light shafts are a characteristic of the internal architecture given that there are 15 within the house. The ordering and supply process was straightforward and installing them worked well with the pre-made upstands. All in all a very satisfactory and successful decision to select Eos rooflights.

Posted 1 year ago

Mr Jones

I was after rooflights with laminated glass and of good quality! I contacted EOS after seeing and viewing their products. They fitted the requirements. The service was first rate, nothing was a problem and the drawings to work before delivery excellent. Would highly recommend.

Posted 1 year ago