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Modular Rooflights Fixed


Please Ensure Sizes Ordered Are Correct – Sizes Cannot be Changed Once The Order Is Processed.

This item is made to order
All prices are subject to 20% VAT

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UK mainland delivery
Thermally Broken construction ensure no cold bridging
Price Match Guarantee for Like-for-Like Products
Exceptional U Values
Factory Sealed units and aluminium frame
Custom made sizes at extra cost
Laminated inner glass pane for extra safety to prevent injuries. Most suppliers do not offer this option.

What are modular rooflights?

Modular rooflights are made up of multiple panels or modules that can be configured together to create a larger skylight. Popular in commercial and industrial buildings, they help bring natural light into an interior space. Easy to assemble and disassemble, they allow for quick and easy installation and maintenance.

Mardome Glass Link Modules supplied by Toughened Glass Systems are designed to fit neatly together to create rooflights that can be installed over any specified length. These rooflight units are made using high quality glass and are factory assembled and with a span of 3.8m, they can be easily linked together for unlimited lengths.

If you are looking for a bespoke fixed and opening combined configuration then contact us for a tailored quote. The prices on this page are for the fixed no opening option.

We stock a range of rooflights and skylights, including fixed rooflights, Mardome rooflights, roof windows and more. 

What buildings can benefit from modular rooflights?

Suitable for residential projects and commercial property developments, the factory glazed rooflight modules are highly flexible. Every rooflight comes in an anthracite grey finish to the external frame, creating a modern and sleek design.

Are modular rooflights energy efficient?

Made from structurally glazed double-glazed units, the Modular rooflight frames are powder coated, while their frames are fully thermally broken. This makes them a good, energy efficient choice. Learn more about energy efficient rooflights.


Modular rooflights are designed to deliver an efficient installation process for all modern building types, enhancing natural light while also providing ventilation where required. All Mardome Glass Rooflights are made using systems that are ISO 9001 and ISO 14001 accredited.

Choose Toughened Glass Systems for your modular rooflights

Many competitors provide rooflights with a bottom pane that consists of 6mm toughened glass; however, at Toughened Glass Systems, our product features inner laminated glass. The inner pane will be 9.5mm or 11.5mm on larger units. The laminated panes are created using a bonding film which is also known as an interlayer that is positioned in-between the plies of glass. Should they fracture, the interlayer will help to keep the broken glass in place, reducing the risk of injury to those within reach of the rooflight. Using this laminate glass on the bottom of our units ensures that our products have a higher level of safety when compared to using only toughened glass on the bottom pane, which is what the majority of our competitors offer.

Prior to making payment, you will need to check all sizes are correct as every order is made to order which means that they cannot be altered once the manufacturing process begins. Prior to commencing the manufacturing process, all drawings require approval but once approval has been given, the lead time will begin.

The table below shows the glass sections, thickness and weight of each rooflight module.

More rooflight products

Measuring & Installation Guide

Please see fitting instructions below and downloadable PDF link at the bottom of this page. Drawings will be sent for approval before manufacturing commences for this product. The size on the price drop down menu is the size of you external timber upstand.
Mardome Glass Link modules are designed for installation at a longitudinal pitch (along length) of 0-15°, and a lateral pitch (across span) of *2°- 35° to prevent water ponding on the glass (leading to rapid dirt build up) and to ensure drainage between modules. For rooflights with opening modules, hinges should be at the ridge of the rooflight span. *Some larger sizes of will require a minimum pitch of up to 5°.

TB293 Installation Mardome Glass Link(Click here to view PDF)

TB294 Installation Mardome Glass Link (Single Module Edition)(Click here to view PDF)

Technical Information

Please see PDF at the bottom of this page for the data sheet.

The product is fitted to a builder’s upstand with self-drilling, anti-tamper security fixings. All fixed Mardome Glass Link rooflights achieve Secured by Design accreditation.

• Factory assembled modules simply lap together for a swift installation of unlimited length.
• All modules are flush including opening ones. Please contact us for opening quotes.
• Components of powered opening rooflights are completely concealed for an unobstructed light well.
• Dual colour powder coated as standard, fully thermally broken aluminium framework. Option to powder coat in any single RAL colour
• Spans of up to 3800mm are possible with individual modules of up to 3800x1750mm allowing for large uninterrupted daylight areas.
• Suitable for installation at pitches of *2-35° across span and 15° along length (*Some larger sizes will require a minimum installation pitch of up to 5°.)
• Ud-value of 1.31* to 1.65**W/m2K. (*3800x1650mm fixed module) (**1000x1000mm opening module)
• CWCT TN-92 tested (for class 2 roofs) and ACR[M]001 Class B nonfragile.
• Fixed Mardome Glass Link rooflights achieve Secured by Design accreditation.

Thermal Performance
Mardome Glass Link modules achieve a Ud-value (defined in accordance with NARM NTD2) of 1.31 to 1.65 W/m2K which exceeds requirements of Part L Building Regulations.

Fire Rating
Building Regulations Approved Document B (2006 edition, incorporating 2010 and 2013 amendments) sets out the rules for fire safety of buildings, which can be met by achieving specific fire ratings to either British (BS476) or European (BS EN 13501) test standards. Brett Martin Mardome Glass achieves BS476 Class 1

Wind and Snow Load
Mardome Glass Link modules have been tested to show that when correctly fitted in accordance with our instructions, they will resist wind loads calculated in accordance with BS EN 1991-1-4: 2005.

TB288 Datasheet Mardome Glass Link(Click here to view PDF)


These units are expected to remain fit for purpose in normal industrial conditions for a period of 20 years (guaranteed for 10 years), i.e. they will not become perforated, lose significant structural integrity or distort to the extent of losing weather-tightness. Insulated glass used in the construction of the rooflight is guaranteed for 5 years.

Delivery & Lead Time

Lead time for this product 4-6 weeks. Lead time may vary at times due to workload.
The customer is responsible for unloading and may require require mechanical lifting equipment – please contact us for further information. We do not recommenced arranging labour for installation until the item has been delivered.

Please ensure labour and equipment is on site to sign for and off load the product from the vehicle as the driver from the transport company is not responsible for off loading.

TB299 Handling Information Mardome Glass Link(Click here to view PDF)

Based on 210 reviews
Bob toploft
Bob toploft
I am the owner of Top loft company ltd, after reviewing reviews from various companies I ordered 2 juliet balconies from tgs arrived within 3 weeks, comunications and help was brilliant. Thanks for all your help.
Jim H
Jim H
Great service from the team. Easy to order, good buying guidance and clear install instructions for my builder. Rooflights look absolutely great! The team at TGS couldn't have been more helpful in organising a smaller delivery vehicle to help with restricted access. Highly recommend TGS.
Jack Smith
Jack Smith
Great service from a very knowledgeable company. Thanks team Toughened Glass Systems.
Paul Smith
Paul Smith
I was spending a lot of money on several rooflights so I wanted to make sure I got it right and I did. The professionalism, expertise and the quality of the roof lanterns really set Toughened Glass Systems apart.
Tyrone Eldridge
Tyrone Eldridge
There are no complaints about the experience with TGS. The entire process of ordering, supplying and delivering was flawless. I would really recommend you order your flat roof sky lanterns from these guys.
Robert Childers
Robert Childers
Best place for rooflights, they supply many different types and options. Thanks for all your support Toughened Glass Systems!
John Smith
John Smith
The glass balustrade gives us an amazing view onto the lake outside. So happy we ended up going for the frameless glass balcony from Toughened Glass Systems instead of one with posts
Louise Newsome
Louise Newsome
My job is to design the interiors for a lot of houses and a lot of times the hardest part was when the client wanted some really inexpensive rooflights that should look like some contemporary ones as well. That until I found Toughened Glass Systems and started working with them more and more. They have a lot of this kind of stuff at a very decent price, a price for anyone I can say. If you’re looking for cheap skylights for flat roofs or any types of roof lights, they probably have something for you.
Krystina Taylor
Krystina Taylor
Always kept us up to date with our order even when delayed by a few days. Great service from the start and good quality glass balcony delivered.