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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.
Includes BFX Underfelt Collar.
The BFX underfelt collar forms a tight seal between the window and the felt membrane underlay. Whilst the traverse drainage gutter above the window protects the roof opening against water ingress via any broken or missing roofing material.
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The BDX Insulation Collar is quick and easy to fit and comes with a BFX Underfelt Collar.
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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