The velux underfelt collar delivers a weathertight seal between roof windows and roofing systems, engineered for reliable protection across varied construction types. The pleated material design ensures flexible, consistent sealing against roof underfelt. Constructed from diffusion-open material, this collar minimises condensation risk while maintaining breathability. The integrated transverse drainage gutter channels water away from the window head when tiles or slates above become damaged. Welded corners provide watertight integrity and streamlined installation. Compatible with mk06 roof window models, this essential component ensures long-term protection against water ingress and weather damage. Features & benefits: pleated material construction provides flexible, tight seal to roof underfelt across all construction types. Diffusion-open material minimises condensation risk while maintaining breathability. Integrated transverse drainage gutter diverts water away from window head if roofing above is damaged. Welded corners deliver watertight seal and simplified installation process. Ideal for residential roof window installations, renovations and professional roofing projects requiring reliable weatherproofing. Compatible with roof window model: mk06. Dimensions: 780 x 1178mm. Model: bfx mk06 1000.
The velux underfelt collar delivers a weathertight seal between roof windows and roofing systems, engineered for reliable protection across varied construction types. The pleated material
