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

Spring Savings

Spring into action with a variety of deals and savings this season! Shop the deals now!

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 174 of 174 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 174 of 174 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 174 of 174 products
  • pro clima | Insulation Merchant
    Sale 83%
    AEROSANA VISCONN FIBRE by Pro Clima

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

    From £11.71 per item
    ex. GB VAT
    £72.40 Save £60.69
    From £11.71 per item
    ex. GB VAT
  • SIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade) | Insulation Merchant
    MAJVEST® by SIGA

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

    £162.88 per item
    £2.17 per m²
    ex. GB VAT
    Save £-162.88
    £162.88 per item
    £2.17 per m²
    ex. GB 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)

    £31.45 per item
    £3.14 per ea
    ex. GB VAT
    £35.70 Save £4.25
    £31.45 per item
    £3.14 per ea
    ex. GB VAT
  • Pro Clima Extoseal Encors - 200mm x 20m | Insulation Merchant
    Sale
    EXTOSEAL by Pro Clima

    Pro Clima Extoseal Encors - 200mm x 20m

    £153.67 per item
    ex. GB VAT
    £157.90 Save £4.23
    £153.67 per item
    ex. GB 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)

    £32.21 per item
    £5.36 per ea
    ex. GB VAT
    Save £-32.21
    £32.21 per item
    £5.36 per ea
    ex. GB 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

    £4.17 per item
    ex. GB VAT
    £4.70 Save £0.53
    £4.17 per item
    ex. GB 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)

    £41.04 per item
    £1.64 per LM (linear metre)
    ex. GB VAT
    Save £-41.04
    £41.04 per item
    £1.64 per LM (linear metre)
    ex. GB 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)

    £41.04 per item
    £1.64 per LM (linear metre)
    ex. GB VAT
    Save £-41.04
    £41.04 per item
    £1.64 per LM (linear metre)
    ex. GB 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)

    £281.92 per item
    £3.75 per m²
    ex. GB VAT
    £286.80 Save £4.88
    £281.92 per item
    £3.75 per m²
    ex. GB VAT
  • Pro Clima Extoseal Encors - 150mm x 20m | Insulation Merchant
    Sale
    EXTOSEAL by Pro Clima

    Pro Clima Extoseal Encors - 150mm x 20m

    £113.75 per item
    ex. GB VAT
    £116.90 Save £3.15
    £113.75 per item
    ex. GB VAT
  • ROTHOBLAAS Speedy Band Airtight Tape (without release liner)
    Internal Use
    External Use
    SPEEDY BAND by Rothoblaas

    ROTHOBLAAS Speedy Band Airtight Tape (without release liner)

    From £15.41 per item
    £0.61 per LM (linear metre)
    ex. GB VAT
    Save £-15.41
    From £15.41 per item
    £0.61 per LM (linear metre)
    ex. GB 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)

    £68.25 per item
    £6.82 per ea
    ex. GB VAT
    £69.10 Save £0.85
    £68.25 per item
    £6.82 per ea
    ex. GB 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)

    £44.08 per item
    £1.46 per LM (linear metre)
    ex. GB VAT
    £44.70 Save £0.62
    £44.08 per item
    £1.46 per LM (linear metre)
    ex. GB 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

    £457.88 per item
    £9.14 per m²
    ex. GB VAT
    Save £-457.88
    £457.88 per item
    £9.14 per m²
    ex. GB 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)

    £33.83 per item
    £3.38 per ea
    ex. GB VAT
    £35.70 Save £1.87
    £33.83 per item
    £3.38 per ea
    ex. GB VAT
  • Pro Clima Glumex - Adhesive Remover (400ml) | Insulation Merchant
    Sale 5%
    GLUMEX by Pro Clima

    Pro Clima Glumex - Adhesive Remover (400ml)

    £9.88 per item
    ex. GB VAT
    £10.40 Save £0.52
    £9.88 per item
    ex. GB VAT
  • Pro Clima Contega Fiden Exo (Expansion Joint Tape) - Joint 7-12mm - Roll 15mm x 4.3m | Insulation Merchant
    Sale 10%
    CONTEGA FIDEN EXO by Pro Clima

    Pro Clima Contega Fiden Exo (Expansion Joint Tape) - Joint 7-12mm - Roll 15mm x 4.3m

    £5.83 per item
    ex. GB VAT
    £6.50 Save £0.67
    £5.83 per item
    ex. GB VAT
  • 50mm SIGA Nail Sealing Tape - 30m | Insulation Merchant
    NAIL SEALING by SIGA

    50mm SIGA Nail Sealing Tape - 30m

    £43.17 per item
    £1.43 per LM (linear metre)
    ex. GB VAT
    Save £-43.17
    £43.17 per item
    £1.43 per LM (linear metre)
    ex. GB 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

    £72.83 per item
    £2.91 per LM (linear metre)
    ex. GB VAT
    Save £-72.83
    £72.83 per item
    £2.91 per LM (linear metre)
    ex. GB 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

    £66.17 per item
    £2.20 per LM (linear metre)
    ex. GB VAT
    £68.00 Save £1.83
    £66.17 per item
    £2.20 per LM (linear metre)
    ex. GB VAT