VELUX insulation frame and underfelt collar, 94×160. Insulates around the roof window frame, reducing heat loss and eliminating cold bridges. Makes insulating and installing the roof window a simpler process. Supplied with BFX underfelt collar and transverse drainage gutter. Click fittings ensure fast and accurate assembly.

• Insulates around the roof window frame, reducing heat loss and eliminating cold bridges
• Makes insulating and installing the roof window a simpler process
• Supplied with BFX underfelt collar and transverse drainage gutter