Insulation Collars
VELUX Insulation Collars
VELUX insulation collars are designed to improve the thermal performance of your roof window installation. Used alongside EDL, EDP and EDW flashings, they help reduce heat loss, eliminate cold bridges and minimise the risk of condensation around the window frame.
Each system includes a flexible insulation frame and underfelt collar, creating a tight, weather-resistant seal between the roof window and roof structure for maximum energy efficiency.
Available insulation solutions
- BDX insulation frame & underfelt collar – complete solution for maximum thermal performance and weathertight installation.
- BFX underfelt collar – provides additional protection against wind-driven rain and moisture ingress.
Why use a VELUX insulation collar
Installing an insulation collar helps ensure your roof window meets modern energy efficiency standards, improves indoor comfort and protects the roof structure from moisture-related issues.
If you are unsure which insulation collar is right for your VELUX window and flashing combination, please contact us and our team will be happy to advise.
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VELUX BDX insulation frame and underfelt collar
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£46.80
£35.10 ex. VAT From:£42.12
Single window insulation + felt collars
VELUX BFX underfelt collar only
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£32.40
£22.68 ex. VAT From:£27.22
Single window felt collars