Installing Flat Skylight

A Victorian terraced house in Hackney had a rear extension with a solid flat roof that made the kitchen and dining area feel dark and enclosed. The homeowners wanted to introduce natural light without undertaking a major structural rebuild. The goal was to install a flat skylight to brighten the space, improve ventilation, and create a more pleasant, energy-efficient living environment.

Our Solution

We supplied and installed a high-performance flat glass skylightdesigned specifically for the flat roof extension. The solution included:

• Thermally broken aluminium frame to prevent condensation and heat loss
• Double-glazed unit with low-E coating and argon gas fill
• Walk-on rated glass (up to 150kg per square metre) for safe roof access
• Anti-slip coating on the external glass surface
• Fixed glazed panel with an optional electric opening mechanism for ventilation
• Skylight powder-coated in white to match the interior ceiling
• Tapered insulated upstands to ensure proper water run-off

Installation Process

• Conducted site survey and measured the flat roof opening dimensions
• Coordinated with the homeowners to confirm placement and access
• Cut the roof opening and installed timber upstands with proper insulation
• Applied waterproof membrane flashing around the upstand perimeter
• Lifted the flat skylight frame into position on the upstand
• Secured the frame using mechanical fixings through the upstand structure
• Installed the double-glazed sealed unit into the frame
• Applied external lead or aluminium flashing for a weatherproof seal
• Tested the electric opening mechanism (where specified) for smooth operation
• Completed internal plastering and decoration around the skylight reveal
• Cleaned all glass thoroughly internally and externally