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
  • 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
  • Pro Clima Contega Solido SL-D100 (External Double-sIded Corner Adhesive Tape) - 100mm x 30m | Insulation Merchant
    Sale
    CONTEGA SOLIDO SL-D by Pro Clima

    Pro Clima Contega Solido SL-D100 (External Double-sIded Corner Adhesive Tape) - 100mm x 30m

    £79.40 per item
    £2.64 per LM (linear metre)
    inc. VAT
    £66.17 per item
    £2.21 per LM (linear metre)
    ex. VAT
    £81.60 Save £2.20
    £79.40 per item
    £2.64 per LM (linear metre)
    inc. VAT
    £68.00 Save £1.83
    £66.17 per item
    £2.21 per LM (linear metre)
    ex. VAT
  • Pro Clima Contega Solido SL200 (Internal Single-sIded Corner Adhesive Tape) - 200mm x 30m | Insulation Merchant
    Sale
    CONTEGA SOLIDO SL by Pro Clima

    Pro Clima Contega Solido SL200 (Internal Single-sIded Corner Adhesive Tape) - 200mm x 30m

    £119.50 per item
    inc. VAT
    £99.58 per item
    ex. VAT
    £122.76 Save £3.26
    £119.50 per item
    inc. VAT
    £102.30 Save £2.72
    £99.58 per item
    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 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 Trestard® 420 black FR (Fire Rated Tape) - All Sizes | Insulation Merchant
    Fire Rated
    TRESTARD® by SIGA

    SIGA Trestard® 420 black FR (Fire Rated Tape) - All Sizes

    From £138.35 per item
    £5.53 per LM (linear metre)
    inc. VAT
    From £115.29 per item
    £4.61 per LM (linear metre)
    ex. VAT
    Save £-138.35
    From £138.35 per item
    £5.53 per LM (linear metre)
    inc. VAT
    £0.00 Save £-115.29
    From £115.29 per item
    £4.61 per LM (linear metre)
    ex. VAT
  • SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²) | Insulation Merchant
    MAJCOAT® by SIGA

    SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²)

    £220.90 per item
    £2.94 per m²
    inc. VAT
    £184.08 per item
    £2.45 per m²
    ex. VAT
    Save £-220.90
    £220.90 per item
    £2.94 per m²
    inc. VAT
    £0.00 Save £-184.08
    £184.08 per item
    £2.45 per m²
    ex. VAT
  • ROTHOBLAAS Smart Band Tearable Liner Airtightness Tape - 60mm x 25m
    Sale 5%
    SMART BAND by Rothoblaas

    ROTHOBLAAS Smart Band Tearable Liner Airtightness Tape - 60mm x 25m

    £20.94 per item
    £0.83 per LM (linear metre)
    inc. VAT
    £17.45 per item
    £0.70 per LM (linear metre)
    ex. VAT
    £22.05 Save £1.11
    £20.94 per item
    £0.83 per LM (linear metre)
    inc. VAT
    £18.38 Save £0.93
    £17.45 per item
    £0.70 per LM (linear metre)
    ex. VAT
  • ROTHOBLAAS Clima Control 105 (Variable Vapour Control Membrane) (1.5m x 50m)
    Sale 5%
    Internal Use
    CLIMA CONTROL by Rothoblaas

    ROTHOBLAAS Clima Control 105 (Variable Vapour Control Membrane) (1.5m x 50m)

    £167.49 per item
    £2.23 per m²
    inc. VAT
    £139.58 per item
    £1.86 per m²
    ex. VAT
    £176.31 Save £8.82
    £167.49 per item
    £2.23 per m²
    inc. VAT
    £146.93 Save £7.35
    £139.58 per item
    £1.86 per m²
    ex. VAT
  • Pro Clima Orcon Multibond - Membrane Adhesive Strip Roll (Pack of 2) | Insulation Merchant
    Sale 4%
    ORCON by Pro Clima

    Pro Clima Orcon Multibond - Membrane Adhesive Strip Roll (Pack of 2)

    £56.00 per item
    £2.80 per LM (linear metre)
    inc. VAT
    £46.67 per item
    £2.33 per LM (linear metre)
    ex. VAT
    £58.92 Save £2.92
    £56.00 per item
    £2.80 per LM (linear metre)
    inc. VAT
    £49.10 Save £2.43
    £46.67 per item
    £2.33 per LM (linear metre)
    ex. VAT
  • Pro Clima Solitex Fronta Humida - Wall Lining Membrane (1.5m x 50m) | Insulation Merchant
    SOLITEX FRONTA HUMIDA by Pro Clima

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

    £268.90 per item
    £3.58 per m²
    inc. VAT
    £224.08 per item
    £2.99 per m²
    ex. VAT
    Save £-268.90
    £268.90 per item
    £3.58 per m²
    inc. VAT
    £0.00 Save £-224.08
    £224.08 per item
    £2.99 per m²
    ex. VAT
  • Pro Clima Solitex Fronta WA - Wall Lining Membrane (3m x 50m) | Insulation Merchant
    SOLITEX FRONTA WA by Pro Clima

    Pro Clima Solitex Fronta WA - Wall Lining Membrane (3m x 50m)

    £339.90 per item
    inc. VAT
    £283.25 per item
    ex. VAT
    Save £-339.90
    £339.90 per item
    inc. VAT
    £0.00 Save £-283.25
    £283.25 per item
    ex. VAT
  • ROTHOBLAAS Nail Band (Butyl Nail Sealing Tape)
    Sale 5%
    NAIL BAND by Rothoblaas

    ROTHOBLAAS Nail Band (Butyl Nail Sealing Tape)

    £16.04 per item
    inc. VAT
    £13.37 per item
    ex. VAT
    £16.89 Save £0.85
    £16.04 per item
    inc. VAT
    £14.08 Save £0.71
    £13.37 per item
    ex. VAT
  • SIGA | Insulation Merchant
    External Use
    FENTRIM® by SIGA

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

    From £69.35 per item
    £2.77 per LM (linear metre)
    inc. VAT
    From £57.79 per item
    £2.31 per LM (linear metre)
    ex. VAT
    Save £-69.35
    From £69.35 per item
    £2.77 per LM (linear metre)
    inc. VAT
    £0.00 Save £-57.79
    From £57.79 per item
    £2.31 per LM (linear metre)
    ex. VAT
  • SIGA Wigluv® black 20/40 Split External Adhesive Tape (60mm x 25m) | Insulation Merchant
    WIGLUV® by SIGA

    SIGA Wigluv® black 20/40 Split External Adhesive Tape (60mm x 25m)

    £60.45 per item
    £2.41 per LM (linear metre)
    inc. VAT
    £50.38 per item
    £2.02 per LM (linear metre)
    ex. VAT
    Save £-60.45
    £60.45 per item
    £2.41 per LM (linear metre)
    inc. VAT
    £0.00 Save £-50.38
    £50.38 per item
    £2.02 per LM (linear metre)
    ex. VAT
  • SIGA Primur® Cartridge Bonding Adhesive (310ml) | Insulation Merchant
    PRIMUR® by SIGA

    SIGA Primur® Cartridge Bonding Adhesive (310ml)

    £12.75 per item
    £41.13 per litres
    inc. VAT
    £10.63 per item
    £34.27 per litres
    ex. VAT
    Save £-12.75
    £12.75 per item
    £41.13 per litres
    inc. VAT
    £0.00 Save £-10.63
    £10.63 per item
    £34.27 per litres
    ex. VAT
  • Pro Clima Solitex Adhero 3000 - Self Adhesive Vapour Permeable Membrane (1.5m X 30m) | Insulation Merchant
    SOLITEX by Pro Clima

    Pro Clima Solitex Adhero 3000 - Self Adhesive Vapour Permeable Membrane (1.5m X 30m)

    £414.48 per item
    £9.21 per m²
    inc. VAT
    £345.40 per item
    £7.68 per m²
    ex. VAT
    Save £-414.48
    £414.48 per item
    £9.21 per m²
    inc. VAT
    £0.00 Save £-345.40
    £345.40 per item
    £7.68 per m²
    ex. VAT
  • Pro Clima Roflex Solido 50 - Airtight Pipe Grommet (Pack of 6) | Insulation Merchant
    ROFLEX SOLIDO by Pro Clima

    Pro Clima Roflex Solido 50 - Airtight Pipe Grommet (Pack of 6)

    £27.94 per item
    £4.65 per ea
    inc. VAT
    £23.28 per item
    £3.88 per ea
    ex. VAT
    Save £-27.94
    £27.94 per item
    £4.65 per ea
    inc. VAT
    £0.00 Save £-23.28
    £23.28 per item
    £3.88 per ea
    ex. VAT
  • SIGA Farmer Waterproof High Performance Multi-purpose Tape - 60mm x 15m | Insulation Merchant
    FARMER by SIGA

    SIGA Farmer Waterproof High Performance Multi-purpose Tape - 60mm x 15m

    £21.90 per item
    £1.46 per LM (linear metre)
    inc. VAT
    £18.25 per item
    £1.22 per LM (linear metre)
    ex. VAT
    Save £-21.90
    £21.90 per item
    £1.46 per LM (linear metre)
    inc. VAT
    £0.00 Save £-18.25
    £18.25 per item
    £1.22 per LM (linear metre)
    ex. VAT
  • SIGA Dockskin® 200 Mineral Surface Primer - 1kg bottle | Insulation Merchant
    DOCKSKIN® by SIGA

    SIGA Dockskin® 200 Mineral Surface Primer - 1kg bottle

    £41.45 per item
    inc. VAT
    £34.54 per item
    ex. VAT
    Save £-41.45
    £41.45 per item
    inc. VAT
    £0.00 Save £-34.54
    £34.54 per item
    ex. VAT