VELUX Insulation Collar 78x98cm BDX MK04 2000

Key features

• 78x98cm size suits standard UK loft window openings
• Fiberglass construction provides reliable thermal insulation
• Creates tight seal around window frame to reduce heat loss
• Minimises cold air infiltration and thermal bridging
• Straightforward to install during window fitting or retrofit
• Supports energy-efficient loft performance

Specifications

Material

Fiberglass

Dimensions

78x98cm

Grade

BDX MK04 2000

Application

VELUX roof window insulation collar

Suitable for

Standard UK loft installations up to 98cm width

Description

The VELUX Insulation Collar is designed to fit around the perimeter of loft insulation, creating a tight seal that prevents cold air infiltration and reduces heat loss through the roof. Sized at 78x98cm, it suits standard UK loft installations and is straightforward to fit during window installation or renovation work.

This fiberglass collar works as part of a complete insulation strategy, helping to maintain consistent internal temperatures and reduce energy consumption. By sealing the gap between the window frame and surrounding insulation, it minimises thermal bridging and draughts that can compromise loft performance.

The BDX MK04 2000 specification ensures compatibility with VELUX roof window installations. Proper installation of the insulation collar is essential for achieving the thermal performance of your loft space and supporting energy-efficient building practice.