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.

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Airtight & Windtight Membranes
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  • Pro Clima Aerosanna Fleece | Insulation Merchant pro clima | Insulation Merchant
    Sale 5%
    AEROSANA FLEECE by Pro Clima

    Pro Clima Aerosanna Fleece

    £17.67 inc. VAT
    £0.70 per LM (linear metre)
    £14.73 ex. VAT
    £0.59 per LM (linear metre)
    £17.67 inc. VAT
    £0.70 per LM (linear metre)
    £18.60 Save £0.93
    £14.73 ex. VAT
    £0.59 per LM (linear metre)
    £15.50 Save £0.78
  • 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)

    £540.00 inc. VAT
    £14.40 per m²
    £450.00 ex. VAT
    £12.00 per m²
    £540.00 inc. VAT
    £14.40 per m²
    Save £-540.00
    £450.00 ex. VAT
    £12.00 per m²
    £0.00 Save £-450.00
  • 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

    £462.30 inc. VAT
    £7.70 per m²
    £385.25 ex. VAT
    £6.42 per m²
    £462.30 inc. VAT
    £7.70 per m²
    Save £-462.30
    £385.25 ex. VAT
    £6.42 per m²
    £0.00 Save £-385.25
  • 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

    £ Looking for a price?

    Add to a quote for our best rate.

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

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

    £ Looking for a price?

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  • Blowerproof Liquid Spray on Airtightness Membrane (Blue / Black) - 10kg | Insulation Merchant 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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  • Blowerproof Liquid Brush Paint on Airtightness Membrane (Blue / Black) - 5kg | Insulation Merchant 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

    £ Looking for a price?

    Add to a quote for our best rate.

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

    £135.90 inc. VAT
    £2.71 per m²
    £113.25 ex. VAT
    £2.27 per m²
    £135.90 inc. VAT
    £2.71 per m²
    Save £-135.90
    £113.25 ex. VAT
    £2.27 per m²
    £0.00 Save £-113.25
  • SIGA Majcoat® 150 SOB Breather Membrane - 1.5m x 50m | Insulation Merchant SIGA Majcoat® 150 SOB Breather Membrane - 1.5m x 50m | Insulation Merchant
    Spring Savings
    MAJCOAT® 150 by SIGA

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

    £240.00 inc. VAT
    £3.20 per m²
    £200.00 ex. VAT
    £2.67 per m²
    £240.00 inc. VAT
    £3.20 per m²
    Save £-240.00
    £200.00 ex. VAT
    £2.67 per m²
    £0.00 Save £-200.00
  • SIGA Majcoat® 350 Diffusion-open Breathable Roof Membrane | Insulation Merchant SIGA Majcoat® 350 Diffusion-open Breathable Roof Membrane | Insulation Merchant
    Sale 6%
    Spring Savings
    Bat Friendly
    MAJCOAT® 350 by SIGA

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

    £549.45 inc. VAT
    £10.97 per m²
    £457.88 ex. VAT
    £9.14 per m²
    £549.45 inc. VAT
    £10.97 per m²
    £588.00 Save £38.55
    £457.88 ex. VAT
    £9.14 per m²
    £490.00 Save £32.13
  • A Proctor Group | Insulation Merchant
    PROBREATHE® by A. Proctor Group

    PROCTOR Probreathe A2 Air Vapour Permeable Membrane - 1.5m x 50m

    £ Looking for a price?

    Add to a quote for our best rate.

  • A Proctor Group | Insulation Merchant
    PROBREATHE® by A. Proctor Group

    PROCTOR Probreathe A2 Airtight Membrane & PU Coating - 1.5m x 50m

    £ Looking for a price?

    Add to a quote for our best rate.

  • A Proctor Group | Insulation Merchant
    WRAPTITE® UV by A. Proctor Group

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

    £ Looking for a price?

    Add to a quote for our best rate.

  • 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)

    £379.90 inc. VAT
    £316.58 ex. VAT
    £379.90 inc. VAT
    Save £-379.90
    £316.58 ex. VAT
    £0.00 Save £-316.58
  • Blowerproof Liquid Brush Paint on Airtightness Membrane (White) - 5kg | Insulation Merchant
    LIQUID BRUSH by Blowerproof

    Blowerproof Liquid Brush Paint on Airtightness Membrane (White) - 5kg

    £ Looking for a price?

    Add to a quote for our best rate.

  • SIGA Wetguard® 200 SA - 780mm x 50m | Insulation Merchant SIGA Wetguard® 200 SA - 780mm x 50m | Insulation Merchant
    Spring Savings
    WETGUARD® by SIGA

    SIGA Wetguard® 200 SA - 780mm x 50m

    £382.25 inc. VAT
    £9.80 per m²
    £318.54 ex. VAT
    £8.17 per m²
    £382.25 inc. VAT
    £9.80 per m²
    Save £-382.25
    £318.54 ex. VAT
    £8.17 per m²
    £0.00 Save £-318.54
  • SIGA Majpell® 25 Vapour Control Layer - 1.5m x 50m (75m²) | Insulation Merchant SIGA Majpell® 25 Vapour Control Layer - 1.5m x 50m (75m²) | Insulation Merchant
    Spring Savings
    MAJPELL® 25 by SIGA

    SIGA Majpell® 25 Vapour Control Layer - 1.5m x 50m (75m²)

    £224.70 inc. VAT
    £2.99 per m²
    £187.25 ex. VAT
    £2.50 per m²
    £224.70 inc. VAT
    £2.99 per m²
    Save £-224.70
    £187.25 ex. VAT
    £2.50 per m²
    £0.00 Save £-187.25
  • SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m) | Insulation Merchant SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m) | Insulation Merchant
    Spring Savings
    MAJVEST® 500 SA by SIGA

    SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m)

    £575.95 inc. VAT
    £12.43 per m²
    £479.96 ex. VAT
    £10.36 per m²
    £575.95 inc. VAT
    £12.43 per m²
    Save £-575.95
    £479.96 ex. VAT
    £10.36 per m²
    £0.00 Save £-479.96