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For the ultimate in insulation, we recommend our BDX Insulation Collar.
It reduces heat loss by eliminating thermal bridges between the window and your roof structure. Also comes with BFX Underfelt Collar.
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Technical details
- Underfelt material: frothed polyethylene, heat transfer group 040.
- Collar material: polypropylene.
- Material thickness: 0.5 mm.
- SD value (water vapour diffusion resistance): 0.03 m.
Note: The BDX Insulation Collar cannot be used with EDN flashings.
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Insulating frame Reduces heat loss.
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Underfelt collar
Forms a tight seal between roof window and your felt underlay.
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Traverse Drainage Channel
Ensures safe water drainage from above the window.
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