400 x 2000 mm Frameless Triple Glazed Flat Roof Skylight

Brighten up your interiors with the Skyline Sky Lights 400 x 2000 mm Frameless Flat Roof Skylight, designed to provide extended daylight coverage in corridors, kitchens, extensions, or any narrow space requiring a bold architectural feature.

This high-performance unit features triple-glazed glass construction, combining strength, energy efficiency, and clarity. With a U-value of just 0.9 W/m²K and noise reduction of 39 dB, it offers year-round thermal comfort and sound insulation. Its frameless design and self-cleaning glass provide a seamless, low-maintenance finish ideal for modern homes.

🔍 Technical Specifications:

• Glazing Type: Triple Glazed

• Internal Glass Size: 400 x 2000 mm

• External Glass Size: 600 x 2200 mm

• Top Pane: 6 mm Planibel Clearlite (BS EN 12150 – Thermally Toughened)

• Middle Pane: 4 mm Planibel Clearlite (BS EN 12150 – Thermally Toughened)

• Bottom Pane: Stratobel Clearlite 44.2 iplus 1.1 (Laminated + Low-E coating – EN 14449)

• Spacer: 15 mm Black Warm Edge

• Air Gap: 15 mm Argon Filled (90%) on both layers

• U-Value: 0.9 W/m²K

• G-Value: 58%

• Noise Reduction: 39 dB

• Net Weight: 45 kg

• Self-Cleaning Glass: Yes

• UV Protection: Yes

• Tint: Clear

🛡️ Safety & Compliance

This skylight is CE certified and fully complies with British Standards and UK Building Regulations, ensuring the highest levels of safety and performance. It is suitable for installation at angles up to 45 degrees.

🛠️ Installation Guidance:

• External dimensions extend by 200 mm due to the black border on the top pane.

• Add a 10 mm allowance internally from upstand to upstand for accurate fitment.

• Recommended upstand build: 2×1 or 2×2 inch timber.

• Use foam rope for support and weight distribution.

• Seal perimeter with Dowsil 791 black sealant — do not use acrylic-based sealants.

🧮 Need a Custom Size?

Explore our Frameless Skylight Size Calculators to request your exact fit — made to your measurements with the same precision and performance.

🏆 Why Choose Skyline Sky Lights?

• Triple-glazed for superior energy efficiency

• Frameless, UV-resistant & self-cleaning finish

• Long-format design ideal for narrow spaces

• 20-Year Manufacturer’s Warranty

• Free delivery within London (M25) + fast UK-wide delivery