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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  • 3m Pro Clima Intello Plus - Vapour Check Membrane (50m) | Insulation Merchant
    Sale 10%
    INTELLO PLUS by Pro Clima

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

    £535.90 per item
    £3.57 per m²
    inc. VAT
    £446.58 per item
    £2.98 per m²
    ex. VAT
    £598.20 Save £62.30
    £535.90 per item
    £3.57 per m²
    inc. VAT
    £498.50 Save £51.92
    £446.58 per item
    £2.98 per m²
    ex. VAT
  • Pro Clima Extoseal Encors - 200mm x 20m | Insulation Merchant
    Sale
    EXTOSEAL by Pro Clima

    Pro Clima Extoseal Encors - 200mm x 20m

    £184.40 per item
    inc. VAT
    £153.67 per item
    ex. VAT
    £189.48 Save £5.08
    £184.40 per item
    inc. VAT
    £157.90 Save £4.23
    £153.67 per item
    ex. VAT
  • pro clima | Insulation Merchant
    Sale 83%
    AEROSANA VISCONN FIBRE by Pro Clima

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

    From £14.05 per item
    inc. VAT
    From £11.71 per item
    ex. VAT
    £86.88 Save £72.83
    From £14.05 per item
    inc. VAT
    £72.40 Save £60.69
    From £11.71 per item
    ex. VAT
  • Pro Clima Roflex 30 - Airtight Pipe Grommet (Pack of 10) | Insulation Merchant
    Sale 11%
    ROFLEX by Pro Clima

    Pro Clima Roflex 30 - Airtight Pipe Grommet (Pack of 10)

    £37.74 per item
    £3.77 per ea
    inc. VAT
    £31.45 per item
    £3.15 per ea
    ex. VAT
    £42.84 Save £5.10
    £37.74 per item
    £3.77 per ea
    inc. VAT
    £35.70 Save £4.25
    £31.45 per item
    £3.15 per ea
    ex. VAT
  • SIGA Corvum® 12/48 Pre-folded Corner Adhesive Tape (60mm x 25m) | Insulation Merchant
    CORVUM® by SIGA

    SIGA Corvum® 12/48 Pre-folded Corner Adhesive Tape (60mm x 25m)

    £49.25 per item
    £1.97 per LM (linear metre)
    inc. VAT
    £41.04 per item
    £1.64 per LM (linear metre)
    ex. VAT
    Save £-49.25
    £49.25 per item
    £1.97 per LM (linear metre)
    inc. VAT
    £0.00 Save £-41.04
    £41.04 per item
    £1.64 per LM (linear metre)
    ex. VAT
  • SIGA Corvum® 30/30 - Pre-folded Corner Adhesive Tape (60mm x 25m) | Insulation Merchant
    CORVUM® by SIGA

    SIGA Corvum® 30/30 - Pre-folded Corner Adhesive Tape (60mm x 25m)

    £49.25 per item
    £1.97 per LM (linear metre)
    inc. VAT
    £41.04 per item
    £1.64 per LM (linear metre)
    ex. VAT
    Save £-49.25
    £49.25 per item
    £1.97 per LM (linear metre)
    inc. VAT
    £0.00 Save £-41.04
    £41.04 per item
    £1.64 per LM (linear metre)
    ex. VAT
  • Pro Clima Roflex Solido 100 - Airtight Pipe Grommet (Pack of 6) | Insulation Merchant
    ROFLEX SOLIDO by Pro Clima

    Pro Clima Roflex Solido 100 - Airtight Pipe Grommet (Pack of 6)

    £38.65 per item
    £6.44 per ea
    inc. VAT
    £32.21 per item
    £5.37 per ea
    ex. VAT
    Save £-38.65
    £38.65 per item
    £6.44 per ea
    inc. VAT
    £0.00 Save £-32.21
    £32.21 per item
    £5.37 per ea
    ex. VAT
  • Pro Clima Contega Fiden Exo (Expansion Joint Tape) - Joint 3-6mm - Roll 12mm x 8m | Insulation Merchant
    Sale 11%
    CONTEGA FIDEN EXO by Pro Clima

    Pro Clima Contega Fiden Exo (Expansion Joint Tape) - Joint 3-6mm - Roll 12mm x 8m

    £5.00 per item
    inc. VAT
    £4.17 per item
    ex. VAT
    £5.64 Save £0.64
    £5.00 per item
    inc. VAT
    £4.70 Save £0.53
    £4.17 per item
    ex. VAT
  • Pro Clima Solitex Plus Connect - Vapour Permeable Membrane + Pre-applied Tape (1.5m x 50m 75m²) | Insulation Merchant
    Sale

    5.0

    SOLITEX PLUS by Pro Clima

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

    £338.30 per item
    £4.51 per m²
    inc. VAT
    £281.92 per item
    £3.76 per m²
    ex. VAT
    £344.16 Save £5.86
    £338.30 per item
    £4.51 per m²
    inc. VAT
    £286.80 Save £4.88
    £281.92 per item
    £3.76 per m²
    ex. VAT
  • Pro Clima Roflex 200 - Airtight Pipe Grommet (Pack of 10) | Insulation Merchant
    Sale
    ROFLEX by Pro Clima

    Pro Clima Roflex 200 - Airtight Pipe Grommet (Pack of 10)

    £81.90 per item
    £8.19 per ea
    inc. VAT
    £68.25 per item
    £6.83 per ea
    ex. VAT
    £82.92 Save £1.02
    £81.90 per item
    £8.19 per ea
    inc. VAT
    £69.10 Save £0.85
    £68.25 per item
    £6.83 per ea
    ex. VAT
  • Pro Clima Extoseal Encors - 150mm x 20m | Insulation Merchant
    Sale
    EXTOSEAL by Pro Clima

    Pro Clima Extoseal Encors - 150mm x 20m

    £136.50 per item
    inc. VAT
    £113.75 per item
    ex. VAT
    £140.28 Save £3.78
    £136.50 per item
    inc. VAT
    £116.90 Save £3.15
    £113.75 per item
    ex. VAT
  • Pro Clima Glumex - Adhesive Remover (400ml) | Insulation Merchant
    Sale 5%
    GLUMEX by Pro Clima

    Pro Clima Glumex - Adhesive Remover (400ml)

    £11.85 per item
    inc. VAT
    £9.88 per item
    ex. VAT
    £12.48 Save £0.63
    £11.85 per item
    inc. VAT
    £10.40 Save £0.53
    £9.88 per item
    ex. VAT
  • Pro Clima Roflex 50 - Airtight Pipe Grommet (Pack of 10) | Insulation Merchant
    Sale 5%
    ROFLEX by Pro Clima

    Pro Clima Roflex 50 - Airtight Pipe Grommet (Pack of 10)

    £40.60 per item
    £4.06 per ea
    inc. VAT
    £33.83 per item
    £3.38 per ea
    ex. VAT
    £42.84 Save £2.24
    £40.60 per item
    £4.06 per ea
    inc. VAT
    £35.70 Save £1.87
    £33.83 per item
    £3.38 per ea
    ex. VAT
  • Pro Clima Tescon Profect 50 (Pre-folded Corner Tape) - 30m x 50mm (12/38mm Split) | Insulation Merchant
    Sale
    TESCON by Pro Clima

    Pro Clima Tescon Profect 50 (Pre-folded Corner Tape) - 30m x 50mm (12/38mm Split)

    £52.90 per item
    £1.76 per LM (linear metre)
    inc. VAT
    £44.08 per item
    £1.47 per LM (linear metre)
    ex. VAT
    £53.64 Save £0.74
    £52.90 per item
    £1.76 per LM (linear metre)
    inc. VAT
    £44.70 Save £0.62
    £44.08 per item
    £1.47 per LM (linear metre)
    ex. VAT
  • ROTHOBLAAS Speedy Band Airtight Tape (without release liner)
    Sale 5%
    Internal Use
    External Use
    SPEEDY BAND by Rothoblaas

    ROTHOBLAAS Speedy Band Airtight Tape (without release liner)

    From £17.56 per item
    £0.70 per LM (linear metre)
    inc. VAT
    From £14.63 per item
    £0.59 per LM (linear metre)
    ex. VAT
    £18.49 Save £0.93
    From £17.56 per item
    £0.70 per LM (linear metre)
    inc. VAT
    £15.41 Save £0.78
    From £14.63 per item
    £0.59 per LM (linear metre)
    ex. VAT
  • SIGA Fentrim® 20 50/85 (Pre-folded Internal Corner Tape) - 25m | Insulation Merchant
    FENTRIM® by SIGA

    SIGA Fentrim® 20 50/85 (Pre-folded Internal Corner Tape) - 25m

    £87.40 per item
    £3.49 per LM (linear metre)
    inc. VAT
    £72.83 per item
    £2.91 per LM (linear metre)
    ex. VAT
    Save £-87.40
    £87.40 per item
    £3.49 per LM (linear metre)
    inc. VAT
    £0.00 Save £-72.83
    £72.83 per item
    £2.91 per LM (linear metre)
    ex. VAT
  • 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
  • SIGA Fentrim® IS 2 (Pre-folded External Corner Tape) | Insulation Merchant
    External Use
    FENTRIM® by SIGA

    SIGA Fentrim® IS 2 (Pre-folded External Corner Tape)

    From £56.80 per item
    £2.27 per LM (linear metre)
    inc. VAT
    From £47.33 per item
    £1.89 per LM (linear metre)
    ex. VAT
    Save £-56.80
    From £56.80 per item
    £2.27 per LM (linear metre)
    inc. VAT
    £0.00 Save £-47.33
    From £47.33 per item
    £1.89 per LM (linear metre)
    ex. VAT
  • 50mm SIGA Nail Sealing Tape - 30m | Insulation Merchant
    NAIL SEALING by SIGA

    50mm SIGA Nail Sealing Tape - 30m

    £51.80 per item
    £1.72 per LM (linear metre)
    inc. VAT
    £43.17 per item
    £1.44 per LM (linear metre)
    ex. VAT
    Save £-51.80
    £51.80 per item
    £1.72 per LM (linear metre)
    inc. VAT
    £0.00 Save £-43.17
    £43.17 per item
    £1.44 per LM (linear metre)
    ex. VAT
  • SIGA Meltell® 320 Black Hybrid Sealant (310ml cartridge) | Insulation Merchant
    MELTELL® by SIGA

    SIGA Meltell® 320 Black Hybrid Sealant (310ml cartridge)

    £8.95 per item
    £28.87 per litres
    inc. VAT
    £7.46 per item
    £24.06 per litres
    ex. VAT
    Save £-8.95
    £8.95 per item
    £28.87 per litres
    inc. VAT
    £0.00 Save £-7.46
    £7.46 per item
    £24.06 per litres
    ex. VAT