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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  • SIGA Majcoat® 350 Diffusion-open Breathable Roof Membrane | Insulation Merchant
    Bat Friendly
    MAJCOAT® by SIGA

    SIGA Majcoat® 350 Diffusion-open Breathable "Bat-Safe" Roof Membrane

    £549.45 per item
    £10.97 per m²
    inc. VAT
    £457.88 per item
    £9.14 per m²
    ex. VAT
    Save £-549.45
    £549.45 per item
    £10.97 per m²
    inc. VAT
    £0.00 Save £-457.88
    £457.88 per item
    £9.14 per m²
    ex. VAT
  • 3m Pro Clima Intello Plus - Vapour Check Membrane (50m) | Insulation Merchant
    INTELLO by Pro Clima

    3m Pro Clima Intello Plus - Vapour Check Membrane (50m)

    £603.84 per item
    £4.02 per m²
    inc. VAT
    £503.20 per item
    £3.35 per m²
    ex. VAT
    £0.00 Save £-603.84
    £603.84 per item
    £4.02 per m²
    inc. VAT
    £0.00 Save £-503.20
    £503.20 per item
    £3.35 per m²
    ex. VAT
  • Pro Clima Constivap 2.3 Plus - 1.5m x 50m | Insulation Merchant
    CONSTIVAP by Pro Clima

    Pro Clima Constivap 2.3 Plus - 1.5m x 50m

    £171.32 per item
    inc. VAT
    £142.77 per item
    ex. VAT
    £0.00 Save £-171.32
    £171.32 per item
    inc. VAT
    £0.00 Save £-142.77
    £142.77 per item
    ex. VAT
  • SIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade) | Insulation Merchant
    MAJVEST® by SIGA

    SIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade)

    £195.45 per item
    £2.60 per m²
    inc. VAT
    £162.88 per item
    £2.17 per m²
    ex. VAT
    Save £-195.45
    £195.45 per item
    £2.60 per m²
    inc. VAT
    £0.00 Save £-162.88
    £162.88 per item
    £2.17 per m²
    ex. VAT
  • pro clima | Insulation Merchant
    AEROSANA by Pro Clima

    Pro Clima Aerosanna Visconn Fibre-reinforced Spray/Paintable Airtight Sealant Membrane

    From £14.70 per item
    inc. VAT
    From £12.25 per item
    ex. VAT
    £0.00 Save £-14.70
    From £14.70 per item
    inc. VAT
    £0.00 Save £-12.25
    From £12.25 per item
    ex. VAT
  • STEICOmulti Renova Membrane - 50m x 1.5m | Insulation Merchant
    Sale 18%
    MULTI RENOVA by Steico

    STEICO Multi Renova Membrane - 50m x 1.5m

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  • Pro Clima Solitex Plus Connect - Vapour Permeable Membrane + Pre-applied Tape (1.5m x 50m 75m²) | Insulation Merchant

    5.0

    SOLITEX by Pro Clima

    Pro Clima Solitex Plus Connect - Vapour Permeable Membrane + Pre-applied Tape (1.5m x 50m 75m²)

    £347.24 per item
    £4.62 per m²
    inc. VAT
    £289.37 per item
    £3.86 per m²
    ex. VAT
    £0.00 Save £-347.24
    £347.24 per item
    £4.62 per m²
    inc. VAT
    £0.00 Save £-289.37
    £289.37 per item
    £3.86 per m²
    ex. VAT
  • DuPont™ AirGuard® Reflective - Vapour Control Layer - 1.5m x 50m | Insulation Merchant
    AIRGUARD® by DuPont - Performance Building Solutions

    DuPont™ AirGuard® Reflective - Vapour Control Layer - 1.5m x 50m

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  • Pro Clima Solitex Adhero 3000 - Self Adhesive Vapour Permeable Membrane (1.5m X 30m) | Insulation Merchant
    SOLITEX by Pro Clima

    Pro Clima Solitex Adhero 3000 - Self Adhesive Vapour Permeable Membrane (1.5m X 30m)

    £405.23 per item
    £9.00 per m²
    inc. VAT
    £337.69 per item
    £7.50 per m²
    ex. VAT
    Save £-405.23
    £405.23 per item
    £9.00 per m²
    inc. VAT
    £0.00 Save £-337.69
    £337.69 per item
    £7.50 per m²
    ex. VAT
  • ROTHOBLAAS Clima Control 105 (Variable Vapour Control Membrane) (1.5m x 50m)
    Internal Use
    CLIMA CONTROL by Rothoblaas

    ROTHOBLAAS Clima Control 105 (Variable Vapour Control Membrane) (1.5m x 50m)

    £176.31 per item
    £2.35 per m²
    inc. VAT
    £146.93 per item
    £1.96 per m²
    ex. VAT
    Save £-176.31
    £176.31 per item
    £2.35 per m²
    inc. VAT
    £0.00 Save £-146.93
    £146.93 per item
    £1.96 per m²
    ex. VAT
  • SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²) | Insulation Merchant
    MAJCOAT® by SIGA

    SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²)

    £220.90 per item
    £2.94 per m²
    inc. VAT
    £184.08 per item
    £2.45 per m²
    ex. VAT
    Save £-220.90
    £220.90 per item
    £2.94 per m²
    inc. VAT
    £0.00 Save £-184.08
    £184.08 per item
    £2.45 per m²
    ex. VAT
  • SIGA Majvest® 200 SOB - Breather Membrane with Tape (Particularly for Closed Facade) | Insulation Merchant
    MAJVEST® by SIGA

    SIGA Majvest® 200 SOB - Breather Membrane with Tape (Particularly for Closed Facade)

    £218.65 per item
    £2.91 per m²
    inc. VAT
    £182.21 per item
    £2.43 per m²
    ex. VAT
    Save £-218.65
    £218.65 per item
    £2.91 per m²
    inc. VAT
    £0.00 Save £-182.21
    £182.21 per item
    £2.43 per m²
    ex. VAT
  • Pro Clima Solitex Fronta Humida - Wall Lining Membrane (1.5m x 50m) | Insulation Merchant
    SOLITEX by Pro Clima

    Pro Clima Solitex Fronta Humida - Wall Lining Membrane (1.5m x 50m)

    £285.49 per item
    £3.80 per m²
    inc. VAT
    £237.91 per item
    £3.17 per m²
    ex. VAT
    Save £-285.49
    £285.49 per item
    £3.80 per m²
    inc. VAT
    £0.00 Save £-237.91
    £237.91 per item
    £3.17 per m²
    ex. VAT
  • Pro Clima Solitex Fronta WA - Wall Lining Membrane (3m x 50m) | Insulation Merchant
    SOLITEX by Pro Clima

    Pro Clima Solitex Fronta WA - Wall Lining Membrane (3m x 50m)

    £383.40 per item
    inc. VAT
    £319.50 per item
    ex. VAT
    Save £-383.40
    £383.40 per item
    inc. VAT
    £0.00 Save £-319.50
    £319.50 per item
    ex. VAT
  • ROTHOBLAAS Clima Control 80 (Variable Vapour Control Membrane) (1.5m x 50m)
    Internal Use
    CLIMA CONTROL by Rothoblaas

    ROTHOBLAAS Clima Control 80 (Variable Vapour Control Membrane) (1.5m x 50m)

    £151.12 per item
    £2.01 per m²
    inc. VAT
    £125.93 per item
    £1.68 per m²
    ex. VAT
    Save £-151.12
    £151.12 per item
    £2.01 per m²
    inc. VAT
    £0.00 Save £-125.93
    £125.93 per item
    £1.68 per m²
    ex. VAT
  • Kingspan Nilvent Breather Membrane - 1.5m x 50m | Insulation Merchant
    by Kingspan

    Kingspan Nilvent Breather Membrane - 1.5m x 50m

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  • PROCTOR Wraptite® Self-adhesive Vapour Permeable Airtight Membrane - 1.5 x 50m | Insulation Merchant
    WRAPTITE® by A. Proctor Group

    PROCTOR Wraptite® Self-adhesive Vapour Permeable Airtight Membrane - 1.5 x 50m

    £874.90 per item
    £11.66 per m²
    inc. VAT
    £729.08 per item
    £9.72 per m²
    ex. VAT
    Save £-874.90
    £874.90 per item
    £11.66 per m²
    inc. VAT
    £0.00 Save £-729.08
    £729.08 per item
    £9.72 per m²
    ex. VAT
  • DuPont™ AirGuard® Control - Vapour Control Layer - 1.5 x 50m | Insulation Merchant
    AIRGUARD® by DuPont - Performance Building Solutions

    DuPont™ AirGuard® Control - Vapour Control Layer - 1.5 x 50m

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  • 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
  • DuPont™ Tyvek® Supro - Breather Roof Membrane - 50m x 1.5m (75m²) | Insulation Merchant
    TYVEK® by DuPont - Performance Building Solutions

    DuPont™ Tyvek® Supro - Breather Roof Membrane - 50m x 1.5m (75m²)

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