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Velux Windows

Velux windows bring natural light and fresh air into loft conversions, extensions, and attic spaces, transforming dark areas into bright, comfortable living environments. As the leading name in roof window design, these premium units combine superior build quality with innovative features that enhance energy efficiency and indoor comfort throughout the year.

Our Velux Roof Window Collection

McMahons stocks a comprehensive selection of genuine Velux products to suit every installation requirement.

  • Velux GGL centre-pivot roof windows - openable centre-pivot windows for bringing natural light and ventilation into loft rooms, attic conversions, and rooms in the roof. Available in five sizes: CK02 (550x780mm), CK04 (550x980mm), MK04 (780x980mm), MK06 (780x1180mm), and MK08 (780x1400mm). All feature double glazing, a unique ventilation flap that keeps dust and insects out while allowing fresh air circulation, a top handle bar for comfortable in-reach operation, and a white factory-painted finish. Flashing kits must be purchased separately.
  • Velux EDW 2000 Pro+ tile flashing kits - purpose-designed flashing and collar kits for integrating Velux GGL windows into flat or profiled roofing material up to 120mm in profile, superseding the older EDZ as Velux's standard tile flashing. The Pro+ version includes both the BDX insulation collar and BFX underfelt collar for superior protection against heat loss, cold bridging, and moisture ingress. Available in sizes matching all five GGL window sizes (CK02, MK04, MK06, MK08, SK06).
  • Velux EDL 2000 Pro+ slate flashing kits - flashing and collar kits for installing Velux GGL windows into natural slate roofs up to 8mm thick. Includes BDX insulation collar and BFX underfelt collar for weathertight, thermally efficient installation. Available in sizes matching all five GGL window sizes (CK02, CK04, MK04, MK06, SK06).

Complete your installation with our Roof Window Accessories, including flashings, blinds, and installation kits for a professional finish.

Selecting the right unit depends on your roof pitch, the room's function, and access requirements. Consider whether manual or automated operation suits your needs, and check the glazing specification for optimal thermal performance and noise reduction in your specific location.

Why Choose McMahons for Your Roof Windows?

With nearly two centuries serving Irish builders and homeowners, McMahons offers genuine expertise in roofing and building materials. Our knowledgeable staff can advise on sizing, flashing compatibility, and building regulation compliance to ensure your project runs smoothly from start to finish. Browse our full Roof Windows range to explore all available options.

Ready to bring more light into your home? Speak to one of our experts for personalised guidance on the perfect solution for your project.