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

Summer Specials

View our summer deals and promotions across our range of products.
Clear all filters

Showing 79 of 79 products

Sort by:
Filter and sort

Filter and sort

Showing 79 of 79 products

Clear all filters
Clear all filters
Showing 79 of 79 products
  • Pro Clima | Intello Plus | Insulation Merchant

    5.0

    INTELLO by Pro Clima

    1.5m Pro Clima Intello Plus (Small Handy Rolls) - Vapour Check Membrane (20m)

    £104.78 per item
    £3.49 per m²
    £0.00 Save £-104.78
    £104.78 per item
    £3.49 per m²
  • Pro Clima Intello Plus - Vapour Check Membrane | Insulation Merchant

    5.0

    INTELLO by Pro Clima

    1.5m Pro Clima Intello Plus - Vapour Check Membrane (50m)

    £251.64 per item
    £3.35 per m²
    £0.00 Save £-251.64
    £251.64 per item
    £3.35 per m²
  • Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²) | Insulation Merchant

    5.0

    SOLITEX by Pro Clima

    Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²)

    £247.90 per item
    £3.30 per m²
    Save £-247.90
    £247.90 per item
    £3.30 per m²
  • Pro Clima DA (Small Handy Roll) - Membrane (1.5m x 20m / 30m²) | Insulation Merchant

    5.0

    DA by Pro Clima

    Pro Clima DA (Small Handy Roll) - Membrane (1.5m x 20m / 30m²)

    £75.71 per item
    £2.52 per m²
    £0.00 Save £-75.71
    £75.71 per item
    £2.52 per m²
  • Pro Clima Solitex Plus (Small Handy Roll) - Vapour Permeable Membrane (1.5m x 15m / 22.5m²) | Insulation Merchant

    5.0

    SOLITEX by Pro Clima

    Pro Clima Solitex Plus (Small Handy Roll) - Vapour Permeable Membrane (1.5m x 15m / 22.5m²)

    £90.96 per item
    £4.04 per m²
    £0.00 Save £-90.96
    £90.96 per item
    £4.04 per m²
  • Pro Clima DA - Membrane (1.5m x 50m / 75m²) | Insulation Merchant

    5.0

    DA by Pro Clima

    Pro Clima DA - Membrane (1.5m x 50m / 75m²)

    £170.77 per item
    £2.27 per m²
    Save £-170.77
    £170.77 per item
    £2.27 per m²
  • Pro Clima Solitex Fronta WA - Wall Lining Membrane (1.5m x 50m) | Insulation Merchant
    SOLITEX by Pro Clima

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

    £159.80 per item
    Save £-159.80
    £159.80 per item
  • Protect BarriAir Vapour Control Layer with Integrated Tape - 1.5 x 50m | Insulation Merchant
    Sale 11%
    Top Deals
    Free Shipping
    BARRIAIR by Protect Membranes

    Protect BarriAir Vapour Control Layer with Integrated Tape - 1.5 x 50m

    £99.92 per item
    £1.33 per m²
    £112.50 Save £12.58
    £99.92 per item
    £1.33 per m²
  • Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane
    AEROSANA by Pro Clima

    Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane

    From £10.60 per item
    £0.00 Save £-10.60
    From £10.60 per item
  • SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m | Insulation Merchant
    MAJCOAT® by SIGA

    SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m

    £264.71 per item
    £3.52 per m²
    Save £-264.71
    £264.71 per item
    £3.52 per m²
  • SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²) | Insulation Merchant
    MAJREX® by SIGA

    SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²)

    £317.42 per item
    £4.23 per m²
    Save £-317.42
    £317.42 per item
    £4.23 per m²
  • STEICOmulti UDB Membrane - 50m x 1.5m | Insulation Merchant
    MULTI UDB by Steico

    STEICO Multi UDB Membrane - 50m x 1.5m

    Looking for a price?

    Add to a quote for our best rate.

  • SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²) | Insulation Merchant
    MAJPELL® by SIGA

    SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)

    £194.75 per item
    £2.59 per m²
    Save £-194.75
    £194.75 per item
    £2.59 per m²
  • Pro Clima Solitex Fronta Quattro - Open Facade Membrane (1.5m x 50m) | Insulation Merchant
    SOLITEX by Pro Clima

    Pro Clima Solitex Fronta Quattro - Open Facade Membrane (1.5m x 50m)

    £309.88 per item
    £4.13 per m²
    £0.00 Save £-309.88
    £309.88 per item
    £4.13 per m²
  • SOUDAL Soudatight LQ Paint On Airtight Membrane (White) - 4.5kg | Insulation Merchant
    Sale 6%
    Summer
    SOUDATIGHT by SOUDAL

    SOUDAL Soudatight LQ Paint On Airtight Membrane (White) - 4.5kg

    £28.50 per item
    £6.33 per kg
    £30.45 Save £1.95
    £28.50 per item
    £6.33 per kg
  • SOUDAL Soudatight LQ Paint On Airtight Membrane (Black) - 4.5kg | Insulation Merchant
    Summer
    SOUDATIGHT by SOUDAL

    SOUDAL Soudatight LQ Paint On Fibre-reinforced Airtight Membrane (Black) - 4.5kg

    £33.31 per item
    £7.40 per kg
    £30.45 Save £-2.86
    £33.31 per item
    £7.40 per kg
  • STEICOmulti Membra 5 Vapour Control Layer - 50m x 1.5m | Insulation Merchant
    MULTI MEMBRA 5 by Steico

    STEICOmulti Membra 5 Vapour Control Layer - 50m x 1.5m

    Looking for a price?

    Add to a quote for our best rate.

  • Pro Clima Dasatop - 1.5m x 50m (75m²) | Insulation Merchant
    DASATOP by Pro Clima

    Pro Clima Dasatop - 1.5m x 50m (75m²)

    £185.13 per item
    £2.46 per m²
    £0.00 Save £-185.13
    £185.13 per item
    £2.46 per m²
  • Pro Clima DB+ - 1.35m x 50m | Insulation Merchant
    DB+ by Pro Clima

    Pro Clima DB+ - 1.35m x 50m

    £177.54 per item
    £2.63 per m²
    £0.00 Save £-177.54
    £177.54 per item
    £2.63 per m²
  • SIGA Majvest® 700 SOB - Open Facade Membrane (1.5m x 33.4m) | Insulation Merchant
    MAJVEST® by SIGA

    SIGA Majvest® 700 SOB - Open Facade Membrane (1.5m x 33.4m)

    £315.80 per item
    £6.30 per m²
    Save £-315.80
    £315.80 per item
    £6.30 per m²