Airtight & Windtight Systems

Airtightness and Widtightness are essential 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 helps minimize heat loss or gain and eliminates drafts ensuring a consistent indoor temperature. It also helps eliminate the entry of pollutants, allergens, and moisture, resulting in a healthier indoor environment. 

Shop our range of airtight membranes, tapes, grommets, and sealants.

Airtight & Windtight Systems

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Airtight & Windtight Membranes

Airtight & Windtight Membranes

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Pro Clima Contega Solido SL80 (Internal Single-sIded Corner Adhesive Tape) - 80mm x 30m | Insulation Merchant

Airtight & Windtight Tapes and Sealants

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Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane | Insulation Merchant

Liquid Airtight Membranes

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Airtight Grommets

Airtight Grommets

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Pro Clima Contega Fiden Exo (Expansion Joint Tape) - Joint 5-10mm (Roll 20mm x 5.6m) | Insulation Merchant

Expanding Tapes

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Pro Clima

Pro Clima

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Rothoblaas

Rothoblaas

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SIGA

SIGA

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Learn more from our blogs

Insulating Ground Floors

To undertake a ground floor thermal insulation upgrade it is first important to establish if it is possible or not. In domestic buildings, broadly speaking, there are two styles of floor type - solid ground floor and suspended floor, each with its pros and cons.

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Showing 173 of 173 products
  • Pro Clima Tescon Vana (Airtight Tape)
    Sale 5%
    TESCON by Pro Clima

    Pro Clima Tescon Vana (Airtight Tape)

    From £29.27 per item
    £0.97 per LM (linear metre)
    inc. VAT
    From £24.39 per item
    £0.81 per LM (linear metre)
    ex. VAT
    £30.84 Save £1.57
    From £29.27 per item
    £0.97 per LM (linear metre)
    inc. VAT
    £25.70 Save £1.31
    From £24.39 per item
    £0.81 per LM (linear metre)
    ex. VAT
  • Pro Clima Kaflex Post - Retrofit Airtight Cable Grommet (Pack of 10) | Insulation Merchant
    Sale
    KAFLEX by Pro Clima

    Pro Clima Kaflex Post - Retrofit Airtight Cable Grommet (Pack of 10)

    £34.90 per item
    £3.49 per ea
    inc. VAT
    £29.08 per item
    £2.91 per ea
    ex. VAT
    £35.52 Save £0.62
    £34.90 per item
    £3.49 per ea
    inc. VAT
    £29.60 Save £0.52
    £29.08 per item
    £2.91 per ea
    ex. VAT
  • Pro Clima Compego Tape | Insulation Merchant
    Sale 9%
    COMPEGO by Pro Clima

    Pro Clima Compego Tape

    From £19.90 per item
    inc. VAT
    From £16.58 per item
    ex. VAT
    £21.96 Save £2.06
    From £19.90 per item
    inc. VAT
    £18.30 Save £1.72
    From £16.58 per item
    ex. VAT
  • 80m Pro Clima Duplex Double Sided Membrane Tape | Insulation Merchant
    Sale
    DUPLEX by Pro Clima

    80m Pro Clima Duplex Double Sided Membrane Tape

    £26.30 per item
    £0.32 per LM (linear metre)
    inc. VAT
    £21.92 per item
    £0.27 per LM (linear metre)
    ex. VAT
    £27.00 Save £0.70
    £26.30 per item
    £0.32 per LM (linear metre)
    inc. VAT
    £22.50 Save £0.58
    £21.92 per item
    £0.27 per LM (linear metre)
    ex. VAT
  • SIGA Wigluv® 60 External Adhesive Tape (40m x 60mm) | Insulation Merchant
    WIGLUV® by SIGA

    SIGA Wigluv® 60 External Adhesive Tape (40m x 60mm)

    £47.10 per item
    £1.17 per LM (linear metre)
    inc. VAT
    £39.25 per item
    £0.98 per LM (linear metre)
    ex. VAT
    Save £-47.10
    £47.10 per item
    £1.17 per LM (linear metre)
    inc. VAT
    £0.00 Save £-39.25
    £39.25 per item
    £0.98 per LM (linear metre)
    ex. VAT
  • Pro Clima Roflex 20 - Airtight Pipe Grommet (Pack of 15) | Insulation Merchant
    Sale 12%
    ROFLEX by Pro Clima

    Pro Clima Roflex 20 - Airtight Pipe Grommet (Pack of 15)

    £44.50 per item
    £2.96 per ea
    inc. VAT
    £37.08 per item
    £2.47 per ea
    ex. VAT
    £50.76 Save £6.26
    £44.50 per item
    £2.96 per ea
    inc. VAT
    £42.30 Save £5.22
    £37.08 per item
    £2.47 per ea
    ex. VAT
  • Pro Clima Tescon Naideck - Sealing Adhesive Tape (50mm x 20m) | Insulation Merchant
    Sale
    TESCON by Pro Clima

    Pro Clima Tescon Naideck - Sealing Adhesive Tape (50mm x 20m)

    £21.30 per item
    inc. VAT
    £17.75 per item
    ex. VAT
    £21.84 Save £0.54
    £21.30 per item
    inc. VAT
    £18.20 Save £0.45
    £17.75 per item
    ex. VAT
  • Pro Clima Kaflex Mono - Airtight Cable Grommet (Pack of 15) | Insulation Merchant
    Sale
    KAFLEX by Pro Clima

    Pro Clima Kaflex Mono - Airtight Cable Grommet (Pack of 15)

    £45.60 per item
    inc. VAT
    £38.00 per item
    ex. VAT
    £45.84 Save £0.24
    £45.60 per item
    inc. VAT
    £38.20 Save £0.20
    £38.00 per item
    ex. VAT
  • 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

    £317.65 per item
    £4.23 per m²
    inc. VAT
    £264.71 per item
    £3.53 per m²
    ex. VAT
    Save £-317.65
    £317.65 per item
    £4.23 per m²
    inc. VAT
    £0.00 Save £-264.71
    £264.71 per item
    £3.53 per m²
    ex. VAT
  • 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)

    £380.90 per item
    £5.07 per m²
    inc. VAT
    £317.42 per item
    £4.23 per m²
    ex. VAT
    Save £-380.90
    £380.90 per item
    £5.07 per m²
    inc. VAT
    £0.00 Save £-317.42
    £317.42 per item
    £4.23 per m²
    ex. VAT
  • Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane | Insulation Merchant
    Sale 14%
    AEROSANA VISCONN by Pro Clima

    Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane

    From £10.40 per item
    inc. VAT
    From £8.67 per item
    ex. VAT
    £12.12 Save £1.72
    From £10.40 per item
    inc. VAT
    £10.10 Save £1.43
    From £8.67 per item
    ex. VAT
  • SIGA Twinet® 20 VCL Mounting Tape | Insulation Merchant
    TWINET® by SIGA

    SIGA Twinet® 20 VCL Mounting Tape

    £39.35 per item
    £0.78 per LM (linear metre)
    inc. VAT
    £32.79 per item
    £0.66 per LM (linear metre)
    ex. VAT
    Save £-39.35
    £39.35 per item
    £0.78 per LM (linear metre)
    inc. VAT
    £0.00 Save £-32.79
    £32.79 per item
    £0.66 per LM (linear metre)
    ex. VAT
  • Pro Clima Extoseal Encors - 100mm x 20m | Insulation Merchant
    Sale
    EXTOSEAL by Pro Clima

    Pro Clima Extoseal Encors - 100mm x 20m

    £92.30 per item
    £4.61 per LM (linear metre)
    inc. VAT
    £76.92 per item
    £3.85 per LM (linear metre)
    ex. VAT
    £94.80 Save £2.50
    £92.30 per item
    £4.61 per LM (linear metre)
    inc. VAT
    £79.00 Save £2.08
    £76.92 per item
    £3.85 per LM (linear metre)
    ex. VAT
  • 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)

    £233.70 per item
    £3.11 per m²
    inc. VAT
    £194.75 per item
    £2.60 per m²
    ex. VAT
    Save £-233.70
    £233.70 per item
    £3.11 per m²
    inc. VAT
    £0.00 Save £-194.75
    £194.75 per item
    £2.60 per m²
    ex. VAT
  • Pro Clima Contega Solido EXO100 (External Single-sIded Corner Adhesive Tape) - 30m x 100mm | Insulation Merchant
    Sale
    CONTEGA SOLIDO EXO by Pro Clima

    Pro Clima Contega Solido EXO100 (External Single-sided Corner Adhesive Tape) - 30m x 100mm

    £60.40 per item
    inc. VAT
    £50.33 per item
    ex. VAT
    £62.04 Save £1.64
    £60.40 per item
    inc. VAT
    £51.70 Save £1.37
    £50.33 per item
    ex. VAT
  • Pro Clima Kaflex Duo - Airtight Cable Grommet (Pack of 15) | Insulation Merchant
    Sale 5%
    KAFLEX by Pro Clima

    Pro Clima Kaflex Duo - Airtight Cable Grommet (Pack of 15)

    £43.50 per item
    £2.90 per ea
    inc. VAT
    £36.25 per item
    £2.42 per ea
    ex. VAT
    £45.84 Save £2.34
    £43.50 per item
    £2.90 per ea
    inc. VAT
    £38.20 Save £1.95
    £36.25 per item
    £2.42 per ea
    ex. VAT
  • Pro Clima Orcon F - Flexible airtight solid acrylic sealant (600ml) | Insulation Merchant
    Sale 4%
    ORCON F by Pro Clima

    Pro Clima Orcon F - Flexible airtight solid acrylic sealant (600ml)

    £13.25 per item
    £0.02 per ml
    inc. VAT
    £11.04 per item
    £0.02 per ml
    ex. VAT
    £13.92 Save £0.67
    £13.25 per item
    £0.02 per ml
    inc. VAT
    £11.60 Save £0.56
    £11.04 per item
    £0.02 per ml
    ex. VAT
  • Pro Clima Solitex Fronta Quattro - Open Facade Membrane (1.5m x 50m) | Insulation Merchant
    Sale
    SOLITEX by Pro Clima

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

    £365.60 per item
    £4.87 per m²
    inc. VAT
    £304.67 per item
    £4.06 per m²
    ex. VAT
    £368.16 Save £2.56
    £365.60 per item
    £4.87 per m²
    inc. VAT
    £306.80 Save £2.13
    £304.67 per item
    £4.06 per m²
    ex. VAT
  • SIGA Fentrim® grommet (Black) - External Airtight Cable & Pipe Sealing | Insulation Merchant
    FENTRIM® by SIGA

    SIGA Fentrim® grommet (Black) - External Airtight Cable & Pipe Sealing

    From £4.30 per item
    inc. VAT
    From £3.58 per item
    ex. VAT
    Save £-4.30
    From £4.30 per item
    inc. VAT
    £0.00 Save £-3.58
    From £3.58 per item
    ex. VAT
  • SIGA Fentrim® grommet (White) - Internal Airtight Cable & Pipe Sealing | Insulation Merchant
    FENTRIM® by SIGA

    SIGA Fentrim® grommet (White) - Internal Airtight Cable & Pipe Sealing

    From £4.30 per item
    inc. VAT
    From £3.58 per item
    ex. VAT
    Save £-4.30
    From £4.30 per item
    inc. VAT
    £0.00 Save £-3.58
    From £3.58 per item
    ex. VAT