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VELUX Pitched Roof Installation Products

Complete your roof window project with VELUX installation products, designed to support a precise, weather-tight fit. This range includes insulation collars, underfelt collars and vapour barriers, all engineered to integrate seamlessly with VELUX roof windows and flashing kits for dependable performance in all conditions.

By choosing genuine VELUX installation components, you help improve thermal efficiency, reduce the risk of condensation and maintain manufacturer standards. Suitable for a variety of roof types and pitches, these products provide installers and homeowners with confidence in a durable, long-lasting installation.

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VELUX ZGA WK04 0524 Black Glazing Bar for 98mm Windows

VELUX ZGA WK04 0524 Black Glazing Bar for 98mm Windows

£29.86 ex VAT£35.83 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX UK08 0000 Vapour Barrier (134cm x 140cm)

VELUX BBX UK08 0000 Vapour Barrier (134cm x 140cm)

£31.84 ex VAT£38.21 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX MK04 2000 Insulation & Underfelt Collar (78cm x 98cm)

VELUX BDX MK04 2000 Insulation & Underfelt Collar (78cm x 98cm)

£36.93 ex VAT£44.32 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX MK06 0000 Vapour Barrier (78cm x 118cm)

VELUX BBX MK06 0000 Vapour Barrier (78cm x 118cm)

£27.07 ex VAT£32.48 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX SK06 0000 Vapour Barrier (114cm x 118cm)

VELUX BBX SK06 0000 Vapour Barrier (114cm x 118cm)

£28.59 ex VAT£34.31 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX ZGA WK06 0024 Glazing Bar for CK06, FK06, MK06 & SK06 Windows

VELUX ZGA WK06 0024 Glazing Bar for CK06, FK06, MK06 & SK06 Windows

£33.23 ex VAT£39.88 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX MK08 2000 Insulation & Underfelt Collar (78cm x 140cm)

VELUX BDX MK08 2000 Insulation & Underfelt Collar (78cm x 140cm)

£40.21 ex VAT£48.25 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX PK08 2000 Insulation & Underfelt Collar (94cm x 140cm)

VELUX BDX PK08 2000 Insulation & Underfelt Collar (94cm x 140cm)

£41.68 ex VAT£50.02 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX MK08 0000 Vapour Barrier (78cm x 140cm)

VELUX BBX MK08 0000 Vapour Barrier (78cm x 140cm)

£28.66 ex VAT£34.39 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX PK06 0000 Vapour Barrier (94cm x 118cm)

VELUX BBX PK06 0000 Vapour Barrier (94cm x 118cm)

£28.66 ex VAT£34.39 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX FK06 0000 Vapour Barrier (66cm x 118cm)

VELUX BBX FK06 0000 Vapour Barrier (66cm x 118cm)

£26.27 ex VAT£31.52 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX UK10 0000 Vapour Barrier (134cm x 160cm)

VELUX BBX UK10 0000 Vapour Barrier (134cm x 160cm)

£36.62 ex VAT£43.94 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX PK04 2000 Insulation Collar - 94cm x 98cm

VELUX BDX PK04 2000 Insulation Collar - 94cm x 98cm

£38.43 ex VAT£46.12 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BFX UK04 1000 Underfelt Collar - 134cm x 98cm

VELUX BFX UK04 1000 Underfelt Collar - 134cm x 98cm

£28.66 ex VAT£34.39 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX SK08 0000 Vapour Barrier (114cm x 140cm)

VELUX BBX SK08 0000 Vapour Barrier (114cm x 140cm)

£31.05 ex VAT£37.26 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX UK08 2000 Single Window Insulation & Underfelt Collar (134cm x 140cm)

VELUX BDX UK08 2000 Single Window Insulation & Underfelt Collar (134cm x 140cm)

£45.53 ex VAT£54.64 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX SK10 2000 Insulation & Underfelt Collar

VELUX BDX SK10 2000 Insulation & Underfelt Collar

£46.67 ex VAT£56.00 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BFX MK04 1000 Underfelt Collar (78cm x 98cm)

VELUX BFX MK04 1000 Underfelt Collar (78cm x 98cm)

£25.48 ex VAT£30.58 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BFX PK06 1000 Felt Collar & Drainage Gutter - 94cm x 118cm

VELUX BFX PK06 1000 Felt Collar & Drainage Gutter - 94cm x 118cm

£26.59 ex VAT£31.91 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX CK04 0000 Vapour Barrier (55cm x 98cm)

VELUX BBX CK04 0000 Vapour Barrier (55cm x 98cm)

£23.88 ex VAT£28.66 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX CK02 0000 Vapour Barrier (55cm x 78cm)

VELUX BBX CK02 0000 Vapour Barrier (55cm x 78cm)

£23.09 ex VAT£27.71 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX CK06 0000 Vapour Barrier (55cm x 118cm)

VELUX BBX CK06 0000 Vapour Barrier (55cm x 118cm)

£24.68 ex VAT£29.62 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX PK04 0000 Vapour Barrier (94cm x 98cm)

VELUX BBX PK04 0000 Vapour Barrier (94cm x 98cm)

£27.07 ex VAT£32.48 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX PK10 0000 Vapour Barrier (94cm x 160cm)

VELUX BBX PK10 0000 Vapour Barrier (94cm x 160cm)

£31.05 ex VAT£37.26 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX MK04 2000F Recessed Insulation & Underfelt Collar (78cm x 98cm)

VELUX BDX MK04 2000F Recessed Insulation & Underfelt Collar (78cm x 98cm)

£60.67 ex VAT£72.80 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX UK08 2000F Recessed Insulation & Underfelt Collar (134cm x 140cm)

VELUX BDX UK08 2000F Recessed Insulation & Underfelt Collar (134cm x 140cm)

£74.37 ex VAT£89.24 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX SK01 0000 Vapour Barrier (114cm x 70cm)

VELUX BBX SK01 0000 Vapour Barrier (114cm x 70cm)

£27.87 ex VAT£33.44 inc VATWas: £0.00 ex VAT

VELUX BBX FC08 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 66cm x 140cm

VELUX BBX FC08 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 66cm x 140cm

£26.97 ex VAT£32.36 inc VATWas: £0.00 ex VAT

VELUX ZGA WK02 0024 Glazing Bar for CK02 Windows

VELUX ZGA WK02 0024 Glazing Bar for CK02 Windows

£27.19 ex VAT£32.63 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX ZGA WK08 0024 Glazing Bar for MK08, PK08 & UK08 Windows

VELUX ZGA WK08 0024 Glazing Bar for MK08, PK08 & UK08 Windows

£35.91 ex VAT£43.09 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX ZGA WK10 0024 Glazing Bar for PK10 Windows

VELUX ZGA WK10 0024 Glazing Bar for PK10 Windows

£38.62 ex VAT£46.34 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX CK04 2000 Insulation & Underfelt Collar (55cm x 98cm)

VELUX BDX CK04 2000 Insulation & Underfelt Collar (55cm x 98cm)

£33.67 ex VAT£40.40 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX MK06 2000 Insulation & Underfelt Collar (78cm x 118cm)

VELUX BDX MK06 2000 Insulation & Underfelt Collar (78cm x 118cm)

£38.39 ex VAT£46.07 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX PK10 2000 Insulation & Underfelt Collar (94cm x 160cm)

VELUX BDX PK10 2000 Insulation & Underfelt Collar (94cm x 160cm)

£43.33 ex VAT£52.00 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX FK04 0000 Vapour Barrier (66cm x 98cm)

VELUX BBX FK04 0000 Vapour Barrier (66cm x 98cm)

£24.68 ex VAT£29.62 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX MK10 0000 Vapour Barrier (78cm x 160cm)

VELUX BBX MK10 0000 Vapour Barrier (78cm x 160cm)

£29.46 ex VAT£35.35 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX SK10 0000 Vapour Barrier (114cm x 160cm)

VELUX BBX SK10 0000 Vapour Barrier (114cm x 160cm)

£31.84 ex VAT£38.21 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX UK04 0000 Vapour Barrier (134cm x 98cm)

VELUX BBX UK04 0000 Vapour Barrier (134cm x 98cm)

£29.45 ex VAT£35.34 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX SK08 2000 Insulation & Underfelt Collar (114cm x 140cm)

VELUX BDX SK08 2000 Insulation & Underfelt Collar (114cm x 140cm)

£43.33 ex VAT£52.00 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX FK04 2000 Insulation & Underfelt Collar (66cm x 98cm)

VELUX BDX FK04 2000 Insulation & Underfelt Collar (66cm x 98cm)

£34.49 ex VAT£41.39 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX SK01 2000 Insulation & Underfelt Collar (114cm x 70cm)

VELUX BDX SK01 2000 Insulation & Underfelt Collar (114cm x 70cm)

£39.22 ex VAT£47.06 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX CK01 2000 Window Insulation & Underfelt Collar - 55cm x 70cm

VELUX BDX CK01 2000 Window Insulation & Underfelt Collar - 55cm x 70cm

£32.05 ex VAT£38.46 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BFX PK10 1000 Underfelt Collar - 94cm x 160cm

VELUX BFX PK10 1000 Underfelt Collar - 94cm x 160cm

£28.17 ex VAT£33.80 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BFX CK06 1000 Underfelt Collar & Traverse Drainage Gutter - 55cm x 118cm

VELUX BFX CK06 1000 Underfelt Collar & Traverse Drainage Gutter - 55cm x 118cm

£23.30 ex VAT£27.96 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX CC06 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 55cm x 118cm

VELUX BBX CC06 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 55cm x 118cm

£24.59 ex VAT£29.51 inc VATWas: £0.00 ex VAT

VELUX BBX MC06 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 78cm x 118cm

VELUX BBX MC06 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 78cm x 118cm

£26.97 ex VAT£32.36 inc VATWas: £0.00 ex VAT

VELUX BBX SC10 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 114cm x 160cm

VELUX BBX SC10 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 114cm x 160cm

£31.73 ex VAT£38.08 inc VATWas: £0.00 ex VAT

VELUX BDX SK06 2000 Insulation & Underfelt Collar (114cm x 118cm)

VELUX BDX SK06 2000 Insulation & Underfelt Collar (114cm x 118cm)

£41.89 ex VAT£50.27 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX FK08 0000 Vapour Barrier (66cm x 140cm)

VELUX BBX FK08 0000 Vapour Barrier (66cm x 140cm)

£27.07 ex VAT£32.48 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX MK12 0000 Vapour Barrier (78cm x 180cm)

VELUX BBX MK12 0000 Vapour Barrier (78cm x 180cm)

£31.84 ex VAT£38.21 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX FK08 2000 Insulation Collar - 66 x 140cm

VELUX BDX FK08 2000 Insulation Collar - 66 x 140cm

£38.21 ex VAT£45.85 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX BK04 2000 Insulation & Underfelt Collar (47cm x 98cm)

VELUX BDX BK04 2000 Insulation & Underfelt Collar (47cm x 98cm)

£34.23 ex VAT£41.08 inc VATWas: £0.00 ex VAT

VELUX BFX UK10 1000 Underfelt Collar - 134cm x 160cm

VELUX BFX UK10 1000 Underfelt Collar - 134cm x 160cm

£35.83 ex VAT£43.00 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BBX MC08 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 78cm x 140cm

VELUX BBX MC08 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 78cm x 140cm

£28.55 ex VAT£34.26 inc VATWas: £0.00 ex VAT

VELUX BBX PC08 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 94cm x 140cm

VELUX BBX PC08 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 94cm x 140cm

£29.35 ex VAT£35.22 inc VATWas: £0.00 ex VAT

VELUX BBX SC08 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 114cm x 140cm

VELUX BBX SC08 0000 Vapour Barrier Collar (for Heritage GCL Windows) - 114cm x 140cm

£30.93 ex VAT£37.12 inc VATWas: £0.00 ex VAT

VELUX BBX MK04 0000 Vapour Barrier (78cm x 98cm)

VELUX BBX MK04 0000 Vapour Barrier (78cm x 98cm)

£25.49 ex VAT£30.59 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX EKY W35 2000 White Support Trimmer (3.5m)

VELUX EKY W35 2000 White Support Trimmer (3.5m)

£382.57 ex VAT£459.08 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX CK02 2000 Insulation & Underfelt Collar (55cm x 78cm)

VELUX BDX CK02 2000 Insulation & Underfelt Collar (55cm x 78cm)

£32.86 ex VAT£39.43 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

VELUX BDX FK06 2000 Insulation & Underfelt Collar (66cm x 118cm)

VELUX BDX FK06 2000 Insulation & Underfelt Collar (66cm x 118cm)

£36.93 ex VAT£44.32 inc VATWas: £0.00 ex VAT

10 Year WarrantyBBA Approval Inspection Testing Certification

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