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 minimise 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

Shop by category in Airtight & Windtight Systems

Airtight & Windtight Membranes

Airtight & Windtight Membranes

View collection

Airtight & Windtight Tapes and Sealants

View collection

Liquid Airtight Membranes

View collection
Airtight Grommets

Airtight Grommets

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

Expanding Tapes

View collection
Pro Clima

Pro Clima

View collection
Rothoblaas

Rothoblaas

View collection
SIGA

SIGA

View collection

Summer Specials

View our summer deals and promotions across our range of products.

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.

Clear all filters

Showing 175 of 175 products

Sort by:
Brand Reset
Sub-Brand Reset
Product type Reset
Thickness Reset
Thermal Conductivity (Product) Reset
Thermal Conductivity (Variant) Reset
Price Reset
Price: 0 – £764.35
Filter and sort

Filter and sort

Showing 175 of 175 products

Brand
Clear
Sub-Brand
Clear
Product type
Clear
Thickness
Clear
Thermal Conductivity (Product)
Clear
Thermal Conductivity (Variant)
Clear
Price

Up to £764.35

Clear
Clear all filters
Clear all filters
Showing 175 of 175 products
  • 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
  • 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)

    Looking for a price?

    Add to a quote for our best rate.

  • Man Installling Extoseal Finoc Tape | Insulation Merchant
    Sale 15%
    EXTOSEAL by Pro Clima

    Pro Clima Extoseal Finoc

    From £53.76 per item
    £2.68 per LM (linear metre)
    inc. VAT
    From £44.80 per item
    £2.24 per LM (linear metre)
    ex. VAT
    £63.80 Save £10.04
    From £53.76 per item
    £2.68 per LM (linear metre)
    inc. VAT
    £53.17 Save £8.37
    From £44.80 per item
    £2.24 per LM (linear metre)
    ex. VAT
  • ROTHOBLAAS Barrier NET SD40 (Vapour Control Membrane) (1.5m x 50m)
    Internal Use
    BARRIER by Rothoblaas

    ROTHOBLAAS Barrier NET SD40 (Vapour Control Membrane) (1.5m x 50m)

    £60.33 per item
    £0.80 per m²
    inc. VAT
    £50.28 per item
    £0.67 per m²
    ex. VAT
    Save £-60.33
    £60.33 per item
    £0.80 per m²
    inc. VAT
    £0.00 Save £-50.28
    £50.28 per item
    £0.67 per m²
    ex. VAT
  • SIGA Primur Roll (Flexible Membrane Seal) | Insulation Merchant
    PRIMUR® by SIGA

    SIGA Primur Roll (Flexible Membrane Seal)

    £21.00 per item
    £2.62 per LM (linear metre)
    inc. VAT
    £17.50 per item
    £2.19 per LM (linear metre)
    ex. VAT
    Save £-21.00
    £21.00 per item
    £2.62 per LM (linear metre)
    inc. VAT
    £0.00 Save £-17.50
    £17.50 per item
    £2.19 per LM (linear metre)
    ex. VAT
  • SIGA Dockskin® 100 Fibrous Surface Primer - 1kg bottle | Insulation Merchant-1kg
    DOCKSKIN® by SIGA

    SIGA Dockskin® 100 Fibrous Surface Primer - 1kg bottle

    £30.15 per item
    inc. VAT
    £25.13 per item
    ex. VAT
    Save £-30.15
    £30.15 per item
    inc. VAT
    £0.00 Save £-25.13
    £25.13 per item
    ex. VAT
  • Pro Clima Tescon Rapic (Hand Tearable Airtight Tape)
    TESCON by Pro Clima

    Pro Clima Tescon Rapic (Hand Tearable Airtight Tape)

    £31.80 per item
    £1.06 per LM (linear metre)
    inc. VAT
    £26.50 per item
    £0.88 per LM (linear metre)
    ex. VAT
    Save £-31.80
    £31.80 per item
    £1.06 per LM (linear metre)
    inc. VAT
    £0.00 Save £-26.50
    £26.50 per item
    £0.88 per LM (linear metre)
    ex. VAT
  • ROTHOBLAAS HBS Countersunk Woodscrew (100 p/bx)
    HBS by Rothoblaas

    ROTHOBLAAS HBS Countersunk Woodscrew (100 p/bx)

    Looking for a price?

    Add to a quote for our best rate.

  • ROTHOBLAAS Front Band UV 210 - UV Airtightness Tape
    FRONT BAND UV by Rothoblaas

    ROTHOBLAAS Front Band UV 210 - UV Airtightness Tape

    £31.33 per item
    £1.56 per LM (linear metre)
    inc. VAT
    £26.11 per item
    £1.31 per LM (linear metre)
    ex. VAT
    Save £-31.33
    £31.33 per item
    £1.56 per LM (linear metre)
    inc. VAT
    £0.00 Save £-26.11
    £26.11 per item
    £1.31 per LM (linear metre)
    ex. VAT
  • ROTHOBLAAS Vapor NET 110 (Reinforced Vapour Control Membrane) (1.5m x 50m)
    VAPOR NET 110 by Rothoblaas

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

    £91.53 per item
    £1.22 per m²
    inc. VAT
    £76.28 per item
    £1.02 per m²
    ex. VAT
    Save £-91.53
    £91.53 per item
    £1.22 per m²
    inc. VAT
    £0.00 Save £-76.28
    £76.28 per item
    £1.02 per m²
    ex. VAT
  • ROTHOBLAAS Lama (Insulation Knife)
    LAMA by Rothoblaas

    ROTHOBLAAS Lama (Insulation Knife)

    £34.75 per item
    inc. VAT
    £28.96 per item
    ex. VAT
    Save £-34.75
    £34.75 per item
    inc. VAT
    £0.00 Save £-28.96
    £28.96 per item
    ex. VAT
  • ROTHOBLAAS Membrane Glue
    MEMBRANE GLUE by Rothoblaas

    ROTHOBLAAS Membrane Glue

    From £1.00 per item
    inc. VAT
    From £0.83 per item
    ex. VAT
    Save £-1.00
    From £1.00 per item
    inc. VAT
    £0.00 Save £-0.83
    From £0.83 per item
    ex. VAT
  • ROTHOBLAAS Plaster Band IN (Indoor Plasterable Adhesive Tape)
    Internal Use
    PLASTER BAND by Rothoblaas

    ROTHOBLAAS Plaster Band IN (Indoor Plasterable Adhesive Tape)

    Looking for a price?

    Add to a quote for our best rate.

  • PRO CLIMA INSTAABOX Installation box - 320mm x 190mm (Pack of 10)
    Sale 4%
    INSTAABOX by Pro Clima

    PRO CLIMA INSTAABOX Installation box - 320mm x 190mm (Pack of 10)

    Looking for a price?

    Add to a quote for our best rate.

  • Siga Knife & Ruler Set | Insulation Merchant
    by SIGA

    Siga Knife & Ruler Set

    Looking for a price?

    Add to a quote for our best rate.

  • Pro Clima Roflex 300 - Airtight Pipe Grommet (Pack of 2) | Insulation Merchant
    Sale 7%
    ROFLEX by Pro Clima

    Pro Clima Roflex 300 - Airtight Pipe Grommet (Pack of 2)

    Looking for a price?

    Add to a quote for our best rate.

  • SIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade) | Insulation Merchant
    MAJVEST® by SIGA

    SIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade) 3m Wide Roll

    £499.90 per item
    £6.66 per m²
    inc. VAT
    £416.58 per item
    £5.55 per m²
    ex. VAT
    Save £-499.90
    £499.90 per item
    £6.66 per m²
    inc. VAT
    £0.00 Save £-416.58
    £416.58 per item
    £5.55 per m²
    ex. VAT
  • ROTHOBLAAS POP Safety Helmet - Grey
    Sale 32%
    Top Deals
    HELMET by Rothoblaas

    ROTHOBLAAS POP Safety Helmet - Grey

    £10.00 per item
    inc. VAT
    £8.33 per item
    ex. VAT
    £14.90 Save £4.90
    £10.00 per item
    inc. VAT
    £12.42 Save £4.08
    £8.33 per item
    ex. VAT
  • ROTHOBLAAS Traspir 110 - 1.5m x 50m (75m²)
    External Use
    TRASPIR by Rothoblaas

    ROTHOBLAAS Traspir 110 - 1.5m x 50m (75m²)

    Looking for a price?

    Add to a quote for our best rate.

  • Pro Clima Solitex Adhero Visto - Transparent Self Adhesive Air & Weathertight Membrane (1.5m x 30m)
    SOLITEX by Pro Clima

    Pro Clima Solitex Adhero Visto - Transparent Self Adhesive Air & Weathertight Membrane (1.5m x 30m)

    Looking for a price?

    Add to a quote for our best rate.