High-Performance Sheerline S1 Lantern Systems
Roof Lanterns
Specializing in high-performance aluminum lanterns like the Sheerline S1. Slimline profiles designed for maximum light and thermal efficiency.
Flat Glass Skylights
Seamless, walk-on, or fixed flat glass rooflights. Ideal for modern extensions requiring a minimalist, "glass-only" aesthetic from the interior.
Conservation Rooflights
Discrete, heritage-approved skylights for London conservation areas. Providing natural light while maintaining the historical roofline of period properties.
Thermal Performance & Insulation
Will a roof lantern compromise my room's temperature? No. Modern rooflights like the Sheerline S1 feature advanced thermal breaks and high-spec glazing that achieve incredibly low U-values. This means they trap heat during London winters while reflecting solar gain in the summer, making your extension a comfortable year-round space.
Technical Specification & Performance
Do Roof Lanterns require planning permission in London?
Generally, rooflight installations fall under Permitted Development, provided they do not protrude more than 150mm from the existing roof plane. However, for properties in London Conservation Areas or Grade II listed buildings, we provide bespoke heritage solutions that meet strict local authority guidelines.
Thermal Efficiency (U-Values):
Our Sheerline S1 installations feature a multi-chambered thermal break. This ensures a U-value as low as 1.0 W/m²K, significantly exceeding standard building regulations and keeping your extension energy-efficient year-round.
System Entities:
- ✓ Sheerline S1 Aluminum
- ✓ Slimline 50mm Rafters
- ✓ Self-Cleaning Solar Glass
- ✓ Marine-Grade Powder Coating
- ✓ FENSA Certified Installation
The clean, white framework of the roof lantern complements the surrounding interior, offering a sleek and modern aesthetic. Our team ensures precise and secure installation, guaranteeing both the visual appeal and the long-term performance of the rooflight, providing excellent insulation and weather resistance.
Whether you're looking to enhance your property with a stunning roof lantern or require expert window supply and installation services throughout London, Golden Ratio Windows offers tailored solutions to meet your specific needs.
Contact us today to explore how we can brighten your home and add architectural value with our premium products and installation expertise.
