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Select your Roof Window Size, your Roof Pitch and pick the glazing that better suits you.

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Extra insulation and protection between the roof construction and the window frame

The VELUX BDX insulation frame for standard installations is an insulation frame with flexible foam between the roof construction and the window frame. This provides a tight and secure fit to the roof construction. The VELUX BDX Insulation frame insulates around a single roof window frame, reducing heat loss and eliminating thermal bridges.