VELUX Underfelt Collar 78x140cm BFX MK08 1000

Key features

• Weather-tight flashing collar with integrated transverse drainage gutter
• Compatible with standard VELUX roof window and Sun Tunnel ranges
• Supports professional, visually consistent roof finish
• Suitable for new build and refurbishment applications
• Engineered for reliable performance in typical UK roof conditions
• Contributes to complete daylight and ventilation solutions

Specifications

Collar size

780 × 1400mm

Product code

BFX MK08 1000

Type

Underfelt collar with transverse drainage gutter

Application

Compatible VELUX roof windows and Sun Tunnels

Material

Engineered flashing component

Installation

New build and refurbishment projects

Description

The VELUX BFX MK08 1000 Underfelt Collar is a 780x1400mm flashing component designed to integrate with compatible VELUX roof window and Sun Tunnel systems. It combines an underfelt collar with transverse drainage gutter to create a weather-tight seal at the roof penetration point, ensuring reliable performance in UK roof conditions. Suitable for both new build and refurbishment projects, this collar supports a neat, visually consistent roof finish that meets professional installation standards. When used as part of a wider VELUX daylight and ventilation solution, it contributes to long-term weather protection and system integrity.