Airtight & Windtight Membranes

Airtightness and Widtightness are important aspects to consider when building or renovating. Air leakage into and out of a property can be detrimental to the thermal performance of insulation. Creating an airtight seal in the property with an airtight & windtight membrane can prevent cold air from entering and hot air from escaping. 

We also have a range of airtight tapes and accessories to go along with the airtightness membranes.

View more in the Airtight range
Airtight & Windtight Membranes

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  • PROCTOR Procheck® Adapt Variable VCL Membrane - 50m x 1.5m | Insulation Merchant
    PROCHECK® by A. Proctor Group

    PROCTOR Procheck® Adapt Variable VCL Membrane - 50m x 1.5m

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  • SIGA Wetguard® 200 SA - 390mm x 50m | Insulation Merchant
    WETGUARD® by SIGA

    SIGA Wetguard® 200 SA - 390mm x 50m

    £202.70 per item
    £10.39 per m²
    inc. VAT
    £168.92 per item
    £8.66 per m²
    ex. VAT
    Save £-202.70
    £202.70 per item
    £10.39 per m²
    inc. VAT
    £0.00 Save £-168.92
    £168.92 per item
    £8.66 per m²
    ex. VAT
  • SIGA Wetguard® 200 SA - 1560mm x 50m | Insulation Merchant
    WETGUARD® by SIGA

    SIGA Wetguard® 200 SA - 1560mm x 50m

    £764.35 per item
    £9.79 per m²
    inc. VAT
    £636.96 per item
    £8.17 per m²
    ex. VAT
    Save £-764.35
    £764.35 per item
    £9.79 per m²
    inc. VAT
    £0.00 Save £-636.96
    £636.96 per item
    £8.17 per m²
    ex. VAT
  • ROTHOBLAAS Traspir 150 (Breather Membrane) [BBA]
    External Use
    TRASPIR by Rothoblaas

    ROTHOBLAAS Traspir 150 (Breather Membrane) [BBA]

    From £1.00 per item
    £0.01 per m²
    inc. VAT
    From £0.83 per item
    £0.01 per m²
    ex. VAT
    Save £-1.00
    From £1.00 per item
    £0.01 per m²
    inc. VAT
    £0.00 Save £-0.83
    From £0.83 per item
    £0.01 per m²
    ex. VAT
  • ROTHOBLAAS Barrier NET SD40 (Vapour Control Membrane) (1.5m x 50m)
    Internal Use
    BARRIER by Rothoblaas

    ROTHOBLAAS Barrier NET SD40 (Vapour Control Membrane) (1.5m x 50m)

    £60.33 per item
    £0.80 per m²
    inc. VAT
    £50.28 per item
    £0.67 per m²
    ex. VAT
    Save £-60.33
    £60.33 per item
    £0.80 per m²
    inc. VAT
    £0.00 Save £-50.28
    £50.28 per item
    £0.67 per m²
    ex. VAT
  • Blowerproof Liquid Brush Paint on Airtightness Membrane (Blue / Black) - 5kg | Insulation Merchant
    LIQUID BRUSH by Blowerproof

    Blowerproof Liquid Brush Paint on Airtightness Membrane (Blue / Black) - 5kg

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  • DuPont™ AirGuard® A2 FR AVCL - Fire Retardant Membrane - 1.2 x 50m | Insulation Merchant
    AIRGUARD® by DuPont - Performance Building Solutions

    DuPont™ AirGuard® A2 FR AVCL - Fire Retardant Membrane - 1.2 x 50m

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  • DuPont™ Tyvek® Supro - Breather Felt Roof Membrane - 50m x 1m (50m²) | Insulation Merchant
    TYVEK® by DuPont - Performance Building Solutions

    DuPont™ Tyvek® Supro - Breather Felt Roof Membrane - 50m x 1m (50m²)

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  • SIGA Majcoat® 150 SOB Breather Membrane - 1.5m x 50m | Insulation Merchant
    MAJCOAT® by SIGA

    SIGA Majcoat® 150 SOB Breather Membrane - 1.5m x 50m

    £240.00 per item
    £3.20 per m²
    inc. VAT
    £200.00 per item
    £2.67 per m²
    ex. VAT
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    £240.00 per item
    £3.20 per m²
    inc. VAT
    £0.00 Save £-200.00
    £200.00 per item
    £2.67 per m²
    ex. VAT
  • ROTHOBLAAS Vapor NET 110 (Reinforced Vapour Control Membrane) (1.5m x 50m)
    VAPOR NET 110 by Rothoblaas

    ROTHOBLAAS Vapor NET 110 (Reinforced Vapour Control Membrane) (1.5m x 50m)

    £91.53 per item
    £1.22 per m²
    inc. VAT
    £76.28 per item
    £1.02 per m²
    ex. VAT
    Save £-91.53
    £91.53 per item
    £1.22 per m²
    inc. VAT
    £0.00 Save £-76.28
    £76.28 per item
    £1.02 per m²
    ex. VAT
  • DuPont™ Tyvek® Trifecta™ A2 Fire Rated External Breather Membrane - 1.5m x 25m (37.5m²) | Insulation Merchant
    TYVEK® by DuPont - Performance Building Solutions

    DuPont™ Tyvek® Trifecta™ A2 Fire Rated External Breather Membrane - 1.5m x 25m (37.5m²)

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  • PROCTOR Procheck® A2 FR Vapour & Airtight Membrane - 50m x 1.2m | Insulation Merchant
    PROCHECK® by A. Proctor Group

    PROCTOR Procheck® A2 FR Vapour & Airtight Membrane - 50m x 1.2m

    £450.29 per item
    £7.50 per m²
    inc. VAT
    £375.24 per item
    £6.25 per m²
    ex. VAT
    Save £-450.29
    £450.29 per item
    £7.50 per m²
    inc. VAT
    £0.00 Save £-375.24
    £375.24 per item
    £6.25 per m²
    ex. VAT
  • DuPont™ Tyvek® UV Facade - Rainscreen UV Membrane - 50m x 1.5m (75m²) | Insulation Merchant
    TYVEK® by DuPont - Performance Building Solutions

    DuPont™ Tyvek® UV Facade - Rainscreen UV Membrane - 50m x 1.5m (75m²)

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  • Blowerproof Liquid Spray on Airtightness Membrane (White) - 10kg | Insulation Merchant
    LIQUID SPRAY by Blowerproof

    Blowerproof Liquid Spray on Airtightness Membrane (White) - 10kg

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  • Blowerproof Liquid Spray on Airtightness Membrane (Blue / Black) - 10kg | Insulation Merchant
    LIQUID SPRAY by Blowerproof

    Blowerproof Liquid Spray on Airtightness Membrane (Blue / Black) - 10kg

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  • ROTHOBLAAS Traspir 110 - 1.5m x 50m (75m²)
    New
    External Use
    TRASPIR by Rothoblaas

    ROTHOBLAAS Traspir 110 - 1.5m x 50m (75m²)

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  • Pro Clima Solitex Adhero Visto - Transparent Self Adhesive Air & Weathertight Membrane (1.5m x 30m)
    SOLITEX by Pro Clima

    Pro Clima Solitex Adhero Visto - Transparent Self Adhesive Air & Weathertight Membrane (1.5m x 30m)

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  • ROTHOBLAAS Barrier ALU NET Adhesive 300 (Reflective Self-adhesive Vapour Control Membrane) (1.45m x 50m)
    BARRIER by Rothoblaas

    ROTHOBLAAS Barrier ALU NET Adhesive 300 (Reflective Self-adhesive Vapour Control Membrane) (1.45m x 50m)

    £684.98 per item
    £9.45 per m²
    inc. VAT
    £570.82 per item
    £7.87 per m²
    ex. VAT
    Save £-684.98
    £684.98 per item
    £9.45 per m²
    inc. VAT
    £0.00 Save £-570.82
    £570.82 per item
    £7.87 per m²
    ex. VAT
  • ROTHOBLAAS Barrier ALU Fire A2 SD2500 (Reflective Vapour Control Membrane) (1.2m x 50m)
    TRASPIR by Rothoblaas

    ROTHOBLAAS Barrier ALU Fire A2 SD2500 (Reflective Vapour Control Membrane) (1.2m x 50m)

    £531.39 per item
    £8.85 per m²
    inc. VAT
    £442.83 per item
    £7.38 per m²
    ex. VAT
    Save £-531.39
    £531.39 per item
    £8.85 per m²
    inc. VAT
    £0.00 Save £-442.83
    £442.83 per item
    £7.38 per m²
    ex. VAT
  • ROTHOBLAAS Traspir Adhesive 260 (Breathable Self-adhesive Membrane) (1.45m x 50m)
    External Use
    TRASPIR by Rothoblaas

    ROTHOBLAAS Traspir Adhesive 260 (Breathable Self-adhesive Membrane) (1.45m x 50m)

    £636.44 per item
    £8.78 per m²
    inc. VAT
    £530.37 per item
    £7.32 per m²
    ex. VAT
    Save £-636.44
    £636.44 per item
    £8.78 per m²
    inc. VAT
    £0.00 Save £-530.37
    £530.37 per item
    £7.32 per m²
    ex. VAT