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Quick Product Snapshot
Key Information at a Glance
Opening Style
Fixed, manual opening or powered opening options
Frame Material
Powder-coated aluminium frame with builder’s upstand or PVC kerb options
Best Suited For
Kitchen extensions, hallways, bathrooms, offices and flat roof renovations
Glazing Options
Double-glazed safety glass with specialist glass options available, including solar-control choices
Energy Performance
Centre-pane glass U-value around 1.1 W/m²K on selected specifications, with overall rooflight performance varying by kerb and size
Security
Fixed Flat Glass units can achieve Secured by Design accreditation, with laminated inner panes and robust concealed fixings
Warranty
Brett Martin product warranty available; warranty terms depend on selected model and supply route
Design & Options
Brett Martin Flat Glass can be specified as a simple fixed rooflight or upgraded for ventilation and access, depending on the room below. The design is intentionally low profile, with choices around kerb type, operation, glass and privacy helping the rooflight suit both domestic flat roof extensions and larger commercial spaces.
✓ Choose fixed, manual opening, powered opening or access hatch versions where suitable.
✓ Available for a builder’s upstand or with kerb options depending on roof build-up.
✓ Special glass options include solar control, tinted and obscured glazing.
✓ Low-profile flat glass design keeps the external appearance clean and understated.
✓ A wide range of sizes allows the rooflight to be matched to the room and roof opening.
Why choose BRETT MARTIN Flat Glass
Flat Glass is the most versatile rooflight in the Brett Martin range. It gives you the daylight benefits people want from a rooflight, but with a simple, low-profile finish that works across modern extensions, renovations and commercial spaces. Choose it when you want more daylight, a cleaner ceiling line and a rooflight that quietly gets on with the job.
Key Features
Low-profile flat glass finish
for a sleek modern look
Fixed or opening options
for light or ventilation
Laminated inner safety pane
for peace of mind
Solar-control glass available
for brighter, cooler rooms
Performance & Comfort
Designed for safety, comfort and everyday use, Flat Glass combines strong glazing, robust framing and efficient thermal performance. Opening versions can help release warm air and improve ventilation, while solar-control glass can help manage glare and heat gain in south-facing spaces.
Energy Efficient
Centre-pane U-value 1.1 W/m²K; Ur from 1.46.
Enhanced Security
Fixed units achieve Secured by Design accreditation.
Weather Resistance
BBA approved and suited to 2°–15° flat roofs.
Acoustic Comfort
38 dB Rw direct airborne sound insulation.
Are BRETT MARTIN flat glass lanterns right for your property?
Flat Glass is the right choice when you want more daylight but prefer a clean, understated finish. It suits modern flat roof extensions, utility rooms, bathrooms, home offices and commercial spaces where a low-profile rooflight will sit neatly within the roofline. Opening versions are useful where ventilation matters, while fixed versions work well when the priority is simply bringing natural light deeper into the room.
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