The adapter frame is a high-insulating PVC frame filled with EPS insulation, designed to bridge size or profile differences between the new Skylux skylight and an existing curb. It’s airtight, watertight, and stable, featuring:

• a flashing flange and triple sealing,
• an interior hollow space for plasterboard finishing or cable trunking,
• compatibility with wooden, polyester, or concrete curbs.

• You want to upgrade to a modern skylight or flat roof window.
• The existing curb has a different daylight size, height, or drip edge.
• You prefer not to rebuild or modify your current curb. This is ideal for partial renovations or when replacing older skylights from other brands.

Yes! If your curb is watertight and structurally sound, there’s no need to rebuild it. The Skylux adapter frame allows you to install a new Skylux flat roof window (iWindow²/iWindow³) or (hybrid) skylight (iDome) directly on your existing curb — even if it’s from another brand or has a different profile.

Yes. It’s specifically designed for non-Skylux curbs that differ slightly in daylight size or profile, including curbs with or without a drip edge.

• Fits directly on wooden, polyester, or concrete curbs.
• Triple sealing guarantees airtightness and watertightness.
• Works with curbs slightly larger or smaller than Skylux daylight sizes.
• Compatible with Skylux flat glass windows (iWindow²/iWindow³) and plastic domes (acrylic or polycarbonate).
• No need to remove or rebuild your existing curb — quick, clean, and cost-efficient.
• CE-certified according to EN 1873:2014 + A1:2016.

Your curb must have a minimum height of 150 mm measured from the finished roof surface. It must also be completely watertight and strong enough to bear all vertical loads.

Yes. The adapter frame offers strong insulation performance thanks to its EPS-filled PVC structure and tight triple-seal connection. The overall U-value of the assembled unit (skylight + frame + curb) can reach as low as 0.66 W/m²K with iWindow³.

The frame is fixed directly onto the existing curb using suitable outdoor screws.

Key guidelines:

• Screw only into the top groove of the frame.
• First screw ± 60 mm from the corner, spacing ≤ 400 mm.
• Roofing must not overlap the adapter frame.
• Always ensure the skylight’s screws do not align with adapter screws.

• Skylux flat roof windows: iWindow², iWindow³
• Hybrid skylights: iDome
• Plastic domes: Skylux acrylic or polycarbonate models All versions are supported, including both fixed and openable units.

Full technical files and installation guides are available here:

• Technical files
• Installation guide