Installation Guides

PDF Resources

Easily integrate our Brett Martin Flat Glass top unit with your builder's kerb. To ensure a perfect fit, just measure the external dimensions of your weathered kerb. If your kerb measures 900mm x 900mm, select the corresponding 900mm x 900mm Flat Glass unit for seamless installation.

Builders upstand (opening / vented)

Rooflight is supplied complete with a uPVC frame that fixes to the top of the builder's upstand and houses any opening/ventilation equipment


150mm uPVC

For mounting at the roof surface level, providing 150mm of waterproofing height

300mm uPVC

For mounting typically below roof surface level, providing 300mm of height for insulation and waterproofing

For a smooth and efficient installation, refer to the video guide and downloadable PDF instructions provided. The Brett Martin Opening Flat Glass Skylight is designed for easy fitting, whether mounted directly onto a builder’s upstand or using a PVC kerb for new and retrofit applications. With hidden actuators and a secure, thermally efficient frame, proper installation ensures optimal performance, weather resistance, and long-term durability. Always follow the recommended guidelines to achieve a seamless finish and maximize the benefits of natural light and ventilation in your space.


WU Logo