Flat Skylight & Aluminium Doors

A semi-detached property in Elstree required a combined glazing upgrade to address a dark rear extension and an ageing set of patio doors. The extension had a solid roof that blocked natural light, while the existing doors were draughty, stiff to operate, and out of keeping with the property’s refreshed interior. The owners wanted a coordinated solution that would bring daylight into the kitchen and living area while providing a sleek, modern connection to the garden. The goal was to install a flat skylight and anthracite aluminium doors to brighten the space, improve thermal performance, and create a cohesive contemporary finish.

Our Solution

We supplied and installed a flat skylight and matching anthracite aluminium french door package tailored to the property. The solution included:

Flat Skylight:

• Thermally broken aluminium frame to prevent condensation and heat loss
• Double-glazed unit with low-E coating and argon gas fill for energy efficiency
• Walk-on rated glass for safe roof access during maintenance
• Anti-slip coating on the external glass surface
• Fixed glazed panel with an optional electric opening mechanism for ventilation
• Tapered insulated upstand to ensure proper water run-off
• White internal finish to blend with the ceiling

Aluminium Doors:

• Aluminium casement patio doors with two side-hung opening panels (active and passive leaves)
• Slim-profile frames finished in anthracite grey (RAL 7016) to match the skylight’s external trim and the property’s contemporary scheme
• Thermally broken profiles to eliminate cold bridging and condensation
• Double-glazed units with low-E coating and argon gas fill
• Multi-point locking system on the active leaf with anti-snap cylinder
• Heavy-duty stainless steel friction hinges for smooth, controlled operation
• Low-threshold cill for step-free garden access
• Concealed drop-down weather seals for superior draught protection
• Matching anthracite handles and hardware for a unified finish

Installation Process

• Carried out a detailed site survey with laser measurements of the roof opening and door aperture
• Confirmed skylight placement, door configuration, and anthracite finish with the owners
• Removed the existing roof covering and old patio doors carefully
• Disposed of all waste materials responsibly
• Inspected and prepared the roof structure, upstand position, and door opening
• Cut the roof opening and installed the insulated upstand with tapered firrings
• Applied waterproof membrane flashing around the upstand perimeter
• Lifted the flat skylight frame into position and secured it through the upstand structure
• Fitted the double-glazed sealed unit into the skylight frame
• Applied external lead or aluminium flashing for a weatherproof seal
• Lifted the anthracite aluminium door frame into position using precision packers and laser levels
• Mechanically fixed the frame to the structure, ensuring zero movement
• Hung both door leaves on stainless steel friction hinges and adjusted for smooth operation
• Fitted double-glazed sealed units into both door leaves
• Installed the multi-point locking mechanism on the active leaf and fitted flush bolts to the passive leaf
• Spray-foamed perimeter gaps and applied internal and external silicone seals for airtight, watertight weatherproofing
• Completed internal plastering and decoration around the skylight reveal
• Adjusted all handles, hinges, and locking points for reliable daily use
• Completed thorough clean of glass, frames, and surrounding areas
• Conducted a final walkthrough with the owners to confirm satisfaction