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Flat roof skylight 900×900

£662.16 Excl Vat

Flat Glass Roof lights 900mmx900mm 

Introducing the Brett Martin Flat Glass rooflight ÔÇô your premier choice for superior flat glass roofing solutions at unbeatable prices. Engineered with a focus on both homeowner satisfaction and installer convenience, this rooflight is tailored to meet the soaring demand for flat-roofed home extensions and modern, luminous living spaces.

Data Sheet 

Pitch Requirements

Rooflight should be installed at a minimum pitch of 2┬░ for most sizes to ensure adequate water runoff. Larger units should be installed at a 4┬░ pitch, please see datasheet for more details.

Measuring Guide for fitting to builders upstand

Measure external builders upstand

Acceptable tolerance:

  • Fixed / unvented = rooflight size +20/-0mm
  • Opening / vented = rooflight size +40/-20mm

Builders upstand (fixed / unvented)

Glazed frame only is supplied for side fixing directly to builders upstand

Crafted to effortlessly enhance any property, from residential expansions to expansive commercial projects, our rooflight offers a swift turnaround, with select variants available for delivery within just 48 hours of ordering. Whether you're a homeowner seeking to illuminate your living space, an independent contractor, or part of a larger construction team, trust in Brett Martin to swiftly and confidently infuse stylish natural light into any building.

Opening: Fixed

Non-opening - rooflight side fixed to builders upstand or PVC kerb with security screws



  • Toughened outer pane and laminated inner pane for maximum safety
  • Simple installation direct to builderÔÇÖs curb
  • UV stable silicone sealed insulating glass units for durability
  • RAL7016 Thermally broken aluminium frame reduces risk of condensation
  • Several standard sizes available, with bespoke sizes also an option
  • IMPORTANT: ALL DIMENSIONS ABOVE ARE OVERALL EXTERNAL CURB. Before purchasing your flat roof window, please download and review the following important documents to make sure you get it right the first time.

Important information

All measurements are external and supplied in mm. i.e. measured from the outside edge of the existing upstand 

Note* Non fragile double glazing, for installation onto builders upstand, fixed, non-vented, no accessories, 1200mm x 600mm

Please note, all rooflights are custom made to order and CANNOT BE CHANGED OR CANCELLED ONCE PURCHASED.

Additional information

Weight 81.1 kg
Dimensions 90 × 90 cm