How and where to use guide
VELUX Insulation Collar 94x160cm BDX PK10 2011
Typical applications and where to install
This insulation collar is primarily used in loft spaces to seal gaps around roof penetrations such as VELUX windows, pipes, and electrical conduits. It is also suitable for wrapping around loft access hatches and other openings that allow warm air to escape. The 94 x 160cm dimensions suit standard pitched roof constructions found in most UK residential properties. Install the collar between your main bulk insulation layer and the roof structure to create a continuous thermal barrier and prevent cold bridging at these vulnerable points.
- Loft hatches and access points
- VELUX roof windows and skylights
- Pipes and services passing through the loft
- Electrical conduits and cable entries
- Any roof penetrations in standard pitched roof spaces
Installation and fitting guidance
Begin by measuring your roof penetration or hatch opening to confirm the 94 x 160cm collar will provide adequate coverage with overlap. Unroll the fiberglass batt and position it around the penetration point, ensuring it sits snugly against the opening without gaps. The compact design of the collar allows you to wrap it around pipes or conduits easily. Secure it in place using the surrounding insulation materials or with low-temperature adhesive tape suitable for fiberglass. Ensure the collar sits flush with your main loft insulation layer to maintain thermal continuity and prevent air leakage. Work methodically around each penetration, pressing the collar firmly into place.
- Measure penetration dimensions before installation
- Unroll the collar and position with even overlap on all sides
- Secure using surrounding insulation or compatible adhesive tape
- Ensure no gaps remain between collar and penetration edge
- Press firmly to maintain contact with main insulation layer
Safety, fire performance and maintenance
This product features a baked-in fire retardant treatment that meets UK building safety standards for loft insulation materials. The fiberglass composition is non-combustible and safe for use in residential loft spaces. When handling, wear protective gloves and a dust mask to avoid irritation from fiberglass particles. Ensure adequate ventilation in the loft during and after installation. Once installed, the collar requires minimal maintenance. Periodically inspect the loft to confirm the collar remains in place and has not shifted or compressed. If you notice any settling or gaps developing, top up with additional insulation material to maintain thermal performance.
- Wear gloves and dust mask during handling and installation
- Ensure adequate loft ventilation during work
- Baked-in fire retardant provides safety compliance
- Check periodically that collar remains in position
- Top up any compressed or settled areas to maintain effectiveness
Limitations and best practice on site
This collar is designed to work in conjunction with bulk insulation materials such as mineral wool or fiberglass batts, not as a standalone solution. It is sized for standard roof pitches; if your roof pitch is unusually steep or shallow, check compatibility before ordering. The collar should not be compressed excessively during installation, as this reduces its insulating properties. Ensure the loft space has adequate ventilation to prevent moisture accumulation, which can compromise both the collar and surrounding insulation. Do not use in areas subject to water ingress or dampness without addressing the underlying moisture problem first.
- Use alongside main bulk insulation for complete coverage
- Confirm roof pitch compatibility before installation
- Avoid over-compressing the fiberglass batt
- Maintain loft ventilation to prevent moisture issues
- Address any damp or water ingress before installing