VELUX Vapour Barrier 78x140cm BBX MK08 0000

Key features

• Prevents moisture vapour penetration into insulation
• Reduces condensation risk around roof window installations
• Maintains insulation thermal performance and longevity
• Sized to fit standard roof window openings
• Compatible with VELUX roof window systems
• Simple installation on warm side of insulation

Specifications

Product code

BBX MK08 0000

Dimensions

78 x 140cm

Type

Vapour barrier membrane

Application

Roof window moisture control

Installation position

Warm side of insulation layer

Description

VELUX vapour barriers are essential moisture-control membranes designed to work alongside roof window installations. This 78x140cm barrier prevents water vapour from penetrating insulation layers, reducing condensation risk and maintaining thermal performance. Suitable for use with compatible VELUX roof windows, the barrier sits on the warm side of the insulation layer to manage moisture migration. Proper installation of a vapour barrier extends the life of insulation and helps maintain a healthy internal environment.