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 172 of 172 products
  • Pro Clima Stoppa - 20mm (20 per pack) | Insulation Merchant
    Sale 7%
    STOPPA by Pro Clima

    Pro Clima Stoppa - 20mm (20 per pack)

    £19.20 per item
    £0.96 per ea
    inc. VAT
    £16.00 per item
    £0.80 per ea
    ex. VAT
    £20.76 Save £1.56
    £19.20 per item
    £0.96 per ea
    inc. VAT
    £17.30 Save £1.30
    £16.00 per item
    £0.80 per ea
    ex. VAT
  • Pro Clima Extoseal Encors - 300mm x 20m | Insulation Merchant
    Sale
    EXTOSEAL by Pro Clima

    Pro Clima Extoseal Encors - 300mm x 20m

    £276.90 per item
    £13.84 per LM (linear metre)
    inc. VAT
    £230.75 per item
    £11.54 per LM (linear metre)
    ex. VAT
    £284.40 Save £7.50
    £276.90 per item
    £13.84 per LM (linear metre)
    inc. VAT
    £237.00 Save £6.25
    £230.75 per item
    £11.54 per LM (linear metre)
    ex. VAT
  • ROTHOBLAAS Hermetic Foam (Acoustic Airtight Foam) 750ml
    Sale 5%
    HERMETIC FOAM by Rothoblaas

    ROTHOBLAAS Hermetic Foam (Acoustic Airtight Foam) 750ml

    From £0.95 per item
    inc. VAT
    From £0.79 per item
    ex. VAT
    £1.00 Save £0.05
    From £0.95 per item
    inc. VAT
    £0.83 Save £0.04
    From £0.79 per item
    ex. VAT
  • ROTHOBLAAS Double Band (Double-sided Tape) (40mm x 50m)
    Sale 5%
    Internal Use
    DOUBLE BAND by Rothoblaas

    ROTHOBLAAS Double Band (Double-sided Tape) (40mm x 50m)

    £20.19 per item
    £0.40 per LM (linear metre)
    inc. VAT
    £16.83 per item
    £0.34 per LM (linear metre)
    ex. VAT
    £21.26 Save £1.07
    £20.19 per item
    £0.40 per LM (linear metre)
    inc. VAT
    £17.72 Save £0.89
    £16.83 per item
    £0.34 per LM (linear metre)
    ex. VAT
  • Pro Clima Contega Solido EXO100 (External Single-sIded Corner Adhesive Tape) - 30m x 100mm | Insulation Merchant
    CONTEGA SOLIDO EXO by Pro Clima

    Pro Clima Contega Solido EXO200 (External Single-sided Corner Adhesive Tape) - 30m x 200mm

    £121.03 per item
    inc. VAT
    £100.86 per item
    ex. VAT
    Save £-121.03
    £121.03 per item
    inc. VAT
    £0.00 Save £-100.86
    £100.86 per item
    ex. VAT
  • SIGA Majvest® 200 SOB - Breather Membrane with Tape (Particularly for Closed Facade) | Insulation Merchant
    MAJVEST® by SIGA

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

    £218.65 per item
    £2.91 per m²
    inc. VAT
    £182.21 per item
    £2.43 per m²
    ex. VAT
    Save £-218.65
    £218.65 per item
    £2.91 per m²
    inc. VAT
    £0.00 Save £-182.21
    £182.21 per item
    £2.43 per m²
    ex. VAT
  • SIGA Wigluv® 150 External Adhesive Tape - (150mm x 25m) | Insulation Merchant
    WIGLUV® by SIGA

    SIGA Wigluv® 150 External Adhesive Tape - (150mm x 25m)

    £84.80 per item
    £3.39 per LM (linear metre)
    inc. VAT
    £70.67 per item
    £2.83 per LM (linear metre)
    ex. VAT
    Save £-84.80
    £84.80 per item
    £3.39 per LM (linear metre)
    inc. VAT
    £0.00 Save £-70.67
    £70.67 per item
    £2.83 per LM (linear metre)
    ex. VAT
  • SIGA Wetguard® 200 SA - 390mm x 50m | Insulation Merchant
    WETGUARD® by SIGA

    SIGA Wetguard® 200 SA - 390mm x 50m

    £202.70 per item
    £10.39 per m²
    inc. VAT
    £168.92 per item
    £8.66 per m²
    ex. VAT
    Save £-202.70
    £202.70 per item
    £10.39 per m²
    inc. VAT
    £0.00 Save £-168.92
    £168.92 per item
    £8.66 per m²
    ex. VAT
  • SIGA Wetguard® 200 SA - 1560mm x 50m | Insulation Merchant
    WETGUARD® by SIGA

    SIGA Wetguard® 200 SA - 1560mm x 50m

    £764.35 per item
    £9.79 per m²
    inc. VAT
    £636.96 per item
    £8.17 per m²
    ex. VAT
    Save £-764.35
    £764.35 per item
    £9.79 per m²
    inc. VAT
    £0.00 Save £-636.96
    £636.96 per item
    £8.17 per m²
    ex. VAT
  • SIGA Fentrim® 330 Grey Adhesive Tape - 150mm | Insulation Merchant
    FENTRIM® by SIGA

    SIGA Fentrim® 330 Grey Adhesive Tape - 150mm

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    Add to a quote for our best rate.

  • SIGA Fentrim® 2 50/85 (Pre-folded External Corner Tape) - 25m | Insulation Merchant
    FENTRIM® by SIGA

    SIGA Fentrim® 2 50/85 (Pre-folded External Corner Tape) - 25m

    £88.80 per item
    £3.55 per LM (linear metre)
    inc. VAT
    £74.00 per item
    £2.96 per LM (linear metre)
    ex. VAT
    Save £-88.80
    £88.80 per item
    £3.55 per LM (linear metre)
    inc. VAT
    £0.00 Save £-74.00
    £74.00 per item
    £2.96 per LM (linear metre)
    ex. VAT
  • Pro Clima Stoppa - 16mm (20 per pack) | Insulation Merchant
    Sale 5%
    STOPPA by Pro Clima

    Pro Clima Stoppa - 16mm (20 per pack)

    £18.50 per item
    inc. VAT
    £15.42 per item
    ex. VAT
    £19.56 Save £1.06
    £18.50 per item
    inc. VAT
    £16.30 Save £0.88
    £15.42 per item
    ex. VAT
  • ROTHOBLAAS Traspir 150 (Breather Membrane) [BBA]
    Sale 5%
    External Use
    TRASPIR by Rothoblaas

    ROTHOBLAAS Traspir 150 (Breather Membrane) [BBA]

    From £0.95 per item
    £0.01 per m²
    inc. VAT
    From £0.79 per item
    £0.01 per m²
    ex. VAT
    £1.00 Save £0.05
    From £0.95 per item
    £0.01 per m²
    inc. VAT
    £0.83 Save £0.04
    From £0.79 per item
    £0.01 per m²
    ex. VAT
  • ROTHOBLAAS Clima Control 80 (Variable Vapour Control Membrane) (1.5m x 50m)
    Sale 5%
    Internal Use
    CLIMA CONTROL by Rothoblaas

    ROTHOBLAAS Clima Control 80 (Variable Vapour Control Membrane) (1.5m x 50m)

    £143.56 per item
    £1.91 per m²
    inc. VAT
    £119.63 per item
    £1.60 per m²
    ex. VAT
    £151.12 Save £7.56
    £143.56 per item
    £1.91 per m²
    inc. VAT
    £125.93 Save £6.30
    £119.63 per item
    £1.60 per m²
    ex. VAT
  • ROTHOBLAAS Easy Band Airtightness Tape (60mm x 50m)
    Sale 5%
    Internal Use
    External Use
    EASY BAND by Rothoblaas

    ROTHOBLAAS Easy Band Airtightness Tape (60mm x 50m)

    £24.17 per item
    £0.48 per LM (linear metre)
    inc. VAT
    £20.14 per item
    £0.40 per LM (linear metre)
    ex. VAT
    £25.45 Save £1.28
    £24.17 per item
    £0.48 per LM (linear metre)
    inc. VAT
    £21.21 Save £1.07
    £20.14 per item
    £0.40 per LM (linear metre)
    ex. VAT
  • Pro Clima Aerosanna Fleece | Insulation Merchant
    Sale 5%
    AEROSANA FLEECE by Pro Clima

    Pro Clima Aerosanna Fleece

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    Add to a quote for our best rate.

  • Pro Clima Contega Solido EXO-D80 (External Double-sIded Corner Adhesive Tape) - 30m x 80mm | Insulation Merchant
    Sale 5%
    CONTEGA SOLIDO EXO-D by Pro Clima

    Pro Clima Contega Solido EXO-D80 (External Double-sided Corner Adhesive Tape) - 30m x 80mm

    £64.75 per item
    £2.15 per LM (linear metre)
    inc. VAT
    £53.96 per item
    £1.80 per LM (linear metre)
    ex. VAT
    £68.16 Save £3.41
    £64.75 per item
    £2.15 per LM (linear metre)
    inc. VAT
    £56.80 Save £2.84
    £53.96 per item
    £1.80 per LM (linear metre)
    ex. VAT
  • Pro Clima Roflex 250 - Airtight Pipe Grommet (Pack of 2) | Insulation Merchant
    Sale 7%
    ROFLEX by Pro Clima

    Pro Clima Roflex 250 - Airtight Pipe Grommet (Pack of 2)

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    Add to a quote for our best rate.

  • ROTHOBLAAS Vapor NET 110 (Reinforced Vapour Control Membrane) (1.5m x 50m)
    Sale 5%
    VAPOR NET 110 by Rothoblaas

    ROTHOBLAAS Vapor NET 110 (Reinforced Vapour Control Membrane) (1.5m x 50m)

    £86.95 per item
    £1.15 per m²
    inc. VAT
    £72.46 per item
    £0.97 per m²
    ex. VAT
    £91.53 Save £4.58
    £86.95 per item
    £1.15 per m²
    inc. VAT
    £76.28 Save £3.82
    £72.46 per item
    £0.97 per m²
    ex. VAT
  • ROTHOBLAAS Membrane Glue
    Sale 5%
    MEMBRANE GLUE by Rothoblaas

    ROTHOBLAAS Membrane Glue

    From £0.95 per item
    inc. VAT
    From £0.79 per item
    ex. VAT
    £1.00 Save £0.05
    From £0.95 per item
    inc. VAT
    £0.83 Save £0.04
    From £0.79 per item
    ex. VAT