The VELUX BDX 2000 insulation packages comes complete with BDX insulation collar and BFX underfelt collar.
The BDX 2000 ensures proper insulation between the roof construction and the window frame, and the pleated BFX 1000 underfelt collar ensures a flexible and tight connection between the underfelt and the window frame. The drainage gutter ensures that water from the underfelt above can drain away from the window.
✓ The BDX insulation package comes complete with BFX underfelt collar and drainage gutter
✓ Made to fit all standard roof window sizes
✓ Click fittings ensure fast and accurate assembly