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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  • Pro Clima Intello Plus - Vapour Check Membrane | Insulation Merchant Pro Clima Intello Plus - Vapour Check Membrane | Tescon Vana | Insulation Merchant
    Sale 10%
    INTELLO PLUS by Pro Clima

    PC/IP50

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

    £268.20 inc. VAT
    £3.57 per m²
    £223.50 ex. VAT
    £2.98 per m²
    £268.20 inc. VAT
    £3.57 per m²
    £299.16 you save £30.96
    £223.50 ex. VAT
    £2.98 per m²
    £249.30 you save £25.80
  • Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²) Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²)
    Sale 10%
    SOLITEX PLUS by Pro Clima

    PC/SP1

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

    £265.20 inc. VAT
    £3.53 per m²
    £221.00 ex. VAT
    £2.95 per m²
    £265.20 inc. VAT
    £3.53 per m²
    £295.80 you save £30.60
    £221.00 ex. VAT
    £2.95 per m²
    £246.50 you save £25.50
  • Pro Clima | Intello Plus | Insulation Merchant Pro Clima | Intello Plus | Teson Vana | Insulation Merchant
    Sale 10%
    INTELLO PLUS by Pro Clima

    PC/IP20

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

    £111.50 inc. VAT
    £3.71 per m²
    £92.92 ex. VAT
    £3.10 per m²
    £111.50 inc. VAT
    £3.71 per m²
    £124.44 you save £12.94
    £92.92 ex. VAT
    £3.10 per m²
    £103.70 you save £10.78
  • Pro Clima DA (Small Handy Roll) - Membrane (1.5m x 20m / 30m²) Pro Clima DA (Small Handy Roll) - Membrane (1.5m x 20m / 30m²)
    Sale 1%
    DA by Pro Clima

    PC/DA20

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

    £88.90 inc. VAT
    £2.96 per m²
    £74.08 ex. VAT
    £2.47 per m²
    £88.90 inc. VAT
    £2.96 per m²
    £90.00 you save £1.10
    £74.08 ex. VAT
    £2.47 per m²
    £75.00 you save £0.92
  • Pro Clima Solitex Plus (Small Handy Roll) - Vapour Permeable Membrane (1.5m x 15m / 22.5m²) Pro Clima Solitex Plus (Small Handy Roll) - Vapour Permeable Membrane (1.5m x 15m / 22.5m²)
    Sale 10%
    SOLITEX PLUS by Pro Clima

    PC/SP2

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

    £97.20 inc. VAT
    £4.32 per m²
    £81.00 ex. VAT
    £3.60 per m²
    £97.20 inc. VAT
    £4.32 per m²
    £108.48 you save £11.28
    £81.00 ex. VAT
    £3.60 per m²
    £90.40 you save £9.40
  • Pro Clima DA - Membrane (1.5m x 50m / 75m²) Pro Clima DA - Membrane (1.5m x 50m / 75m²)
    DA by Pro Clima

    PC/DA

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

    £201.50 inc. VAT
    £2.68 per m²
    £167.92 ex. VAT
    £2.24 per m²
    £201.50 inc. VAT
    £2.68 per m²
    you save £-201.50
    £167.92 ex. VAT
    £2.24 per m²
    £0.00 you save £-167.92
  • Pro Clima Solitex Fronta WA - Wall Lining Membrane (1.5m x 50m) Pro Clima Solitex Fronta WA - Wall Lining Membrane (1.5m x 50m)
    SOLITEX FRONTA WA by Pro Clima

    PC/FWA15050

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

    £169.90 inc. VAT
    £141.58 ex. VAT
    £169.90 inc. VAT
    you save £-169.90
    £141.58 ex. VAT
    £0.00 you save £-141.58
  • SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²) SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²)
    MAJREX® by SIGA

    SIG/MR200

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

    £380.90 inc. VAT
    £5.07 per m²
    £317.42 ex. VAT
    £4.23 per m²
    £380.90 inc. VAT
    £5.07 per m²
    you save £-380.90
    £317.42 ex. VAT
    £4.23 per m²
    £0.00 you save £-317.42
  • SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²) SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)
    MAJPELL® 5 VCL by SIGA

    SIG/MP5-15

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

    £233.70 inc. VAT
    £3.11 per m²
    £194.75 ex. VAT
    £2.60 per m²
    £233.70 inc. VAT
    £3.11 per m²
    you save £-233.70
    £194.75 ex. VAT
    £2.60 per m²
    £0.00 you save £-194.75
  • STEICOmulti UDB Membrane - 50m x 1.5m
    MULTI UDB by Steico

    STE/UDB-5015

    STEICOmulti UDB Membrane - 50m x 1.5m

    £237.28 inc. VAT
    £3.16 per m²
    £197.73 ex. VAT
    £2.64 per m²
    £237.28 inc. VAT
    £3.16 per m²
    you save £-237.28
    £197.73 ex. VAT
    £2.64 per m²
    £0.00 you save £-197.73
  • SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m
    MAJCOAT® 200 by SIGA

    SIG/MC200S

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

    £317.65 inc. VAT
    £4.23 per m²
    £264.71 ex. VAT
    £3.53 per m²
    £317.65 inc. VAT
    £4.23 per m²
    you save £-317.65
    £264.71 ex. VAT
    £3.53 per m²
    £0.00 you save £-264.71
  • Protect BarriAir Vapour Control Layer with Integrated Tape - 1.5 x 50m Protect BarriAir Vapour Control Layer with Integrated Tape - 1.5 x 50m
    Autumn Offers
    BARRIAIR by Protect Membranes

    PT/BARRIAIR

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

    £102.97 inc. VAT
    £1.37 per m²
    £85.81 ex. VAT
    £1.14 per m²
    £102.97 inc. VAT
    £1.37 per m²
    you save £-102.97
    £85.81 ex. VAT
    £1.14 per m²
    £0.00 you save £-85.81
  • Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane
    Sale 14%
    AEROSANA VISCONN by Pro Clima

    PC/AVB10L

    Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane

    From £10.40 inc. VAT
    From £8.67 ex. VAT
    From £10.40 inc. VAT
    £12.12 you save £1.72
    From £8.67 ex. VAT
    £10.10 you save £1.43
  • Pro Clima Solitex Fronta Quattro - Open Facade Membrane (1.5m x 50m) Pro Clima Solitex Fronta Quattro - Open Facade Membrane (1.5m x 50m)
    Sale 0%
    SOLITEX by Pro Clima

    PC/FQ

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

    £365.60 inc. VAT
    £4.87 per m²
    £304.67 ex. VAT
    £4.06 per m²
    £365.60 inc. VAT
    £4.87 per m²
    £368.16 you save £2.56
    £304.67 ex. VAT
    £4.06 per m²
    £306.80 you save £2.13
  • STEICOmulti Membra 5 Vapour Control Layer - 50m x 1.5m
    MULTI MEMBRA 5 by Steico

    STE/MM5-5015

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

    £176.30 inc. VAT
    £2.35 per m²
    £146.92 ex. VAT
    £1.96 per m²
    £176.30 inc. VAT
    £2.35 per m²
    you save £-176.30
    £146.92 ex. VAT
    £1.96 per m²
    £0.00 you save £-146.92
  • SIGA Majvest® 700 SOB - Open Facade Membrane (1.5m x 33.4m) SIGA Majvest® 700 SOB - Open Facade Membrane (1.5m x 33.4m)
    MAJVEST® 700 SOB by SIGA

    SIG/MV700S

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

    £327.15 inc. VAT
    £6.53 per m²
    £272.63 ex. VAT
    £5.44 per m²
    £327.15 inc. VAT
    £6.53 per m²
    you save £-327.15
    £272.63 ex. VAT
    £5.44 per m²
    £0.00 you save £-272.63
  • SOUDAL Soudatight LQ Paint On Airtight Membrane (Black) - 4.5kg
    Sale 5%
    Autumn Offers
    SOUDATIGHT by SOUDAL

    SOU/STLQB-45

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

    £38.56 inc. VAT
    £8.57 per kg
    £32.13 ex. VAT
    £7.14 per kg
    £38.56 inc. VAT
    £8.57 per kg
    £40.60 you save £2.04
    £32.13 ex. VAT
    £7.14 per kg
    £33.83 you save £1.70
  • SIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade) SIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade)
    MAJVEST® 200 by SIGA

    SIG/MV200-15

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

    £195.45 inc. VAT
    £2.60 per m²
    £162.88 ex. VAT
    £2.17 per m²
    £195.45 inc. VAT
    £2.60 per m²
    you save £-195.45
    £162.88 ex. VAT
    £2.17 per m²
    £0.00 you save £-162.88
  • SOUDAL Soudatight LQ Paint On Airtight Membrane (White) - 4.5kg
    Sale 5%
    Autumn Offers
    SOUDATIGHT by SOUDAL

    SOU/STLQW-45

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

    £38.56 inc. VAT
    £8.57 per kg
    £32.13 ex. VAT
    £7.14 per kg
    £38.56 inc. VAT
    £8.57 per kg
    £40.60 you save £2.04
    £32.13 ex. VAT
    £7.14 per kg
    £33.83 you save £1.70
  • Pro Clima DB+ - 1.35m x 50m Pro Clima DB+ - 1.35m x 50m
    Sale 11%
    DB+ by Pro Clima

    PC/DBPLUS

    Pro Clima DB+ - 1.35m x 50m

    £203.90 inc. VAT
    £3.02 per m²
    £169.92 ex. VAT
    £2.52 per m²
    £203.90 inc. VAT
    £3.02 per m²
    £231.36 you save £27.46
    £169.92 ex. VAT
    £2.52 per m²
    £192.80 you save £22.88