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:
Filter and sort

Filter and sort

Showing 175 of 175 products

Clear all filters
Clear all filters
Showing 175 of 175 products
  • ROTHOBLAAS Flexi Band Airtightness Tape
    Internal Use
    External Use
    FLEXI BAND by Rothoblaas

    ROTHOBLAAS Flexi Band Airtightness Tape

    From £1.00 per item
    £0.04 per LM (linear metre)
    inc. VAT
    From £0.83 per item
    £0.03 per LM (linear metre)
    ex. VAT
    Save £-1.00
    From £1.00 per item
    £0.04 per LM (linear metre)
    inc. VAT
    £0.00 Save £-0.83
    From £0.83 per item
    £0.03 per LM (linear metre)
    ex. VAT
  • Pro Clima Roflex 100 - Airtight Pipe Grommet (Pack of 10) | Insulation Merchant
    ROFLEX by Pro Clima

    Pro Clima Roflex 100 - Airtight Pipe Grommet (Pack of 10)

    £48.26 per item
    £4.82 per ea
    inc. VAT
    £40.22 per item
    £4.02 per ea
    ex. VAT
    £0.00 Save £-48.26
    £48.26 per item
    £4.82 per ea
    inc. VAT
    £0.00 Save £-40.22
    £40.22 per item
    £4.02 per ea
    ex. VAT
  • Pro Clima Contega Solido SL-D80 (External Double-sIded Corner Adhesive Tape) - 80mm x 30m | Insulation Merchant
    CONTEGA by Pro Clima

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

    £72.68 per item
    £2.42 per LM (linear metre)
    inc. VAT
    £60.57 per item
    £2.02 per LM (linear metre)
    ex. VAT
    Save £-72.68
    £72.68 per item
    £2.42 per LM (linear metre)
    inc. VAT
    £0.00 Save £-60.57
    £60.57 per item
    £2.02 per LM (linear metre)
    ex. VAT
  • SIGA Wigluv® 20/40 Split External Adhesive Tape (60mm x 25m) | Insulation Merchant
    WIGLUV® by SIGA

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

    £43.20 per item
    £1.72 per LM (linear metre)
    inc. VAT
    £36.00 per item
    £1.44 per LM (linear metre)
    ex. VAT
    Save £-43.20
    £43.20 per item
    £1.72 per LM (linear metre)
    inc. VAT
    £0.00 Save £-36.00
    £36.00 per item
    £1.44 per LM (linear metre)
    ex. VAT
  • 60mm SIGA Wigluv® Black 60 External Adhesive Tape - (40m x 60mm) | Insulation Merchant
    WIGLUV® by SIGA

    60mm SIGA Wigluv® Black 60 External Adhesive Tape - (40m x 60mm)

    From £63.90 per item
    £1.59 per LM (linear metre)
    inc. VAT
    From £53.25 per item
    £1.33 per LM (linear metre)
    ex. VAT
    Save £-63.90
    From £63.90 per item
    £1.59 per LM (linear metre)
    inc. VAT
    £0.00 Save £-53.25
    From £53.25 per item
    £1.33 per LM (linear metre)
    ex. VAT
  • Pro Clima Contega Solido SL150 (Internal Single-sIded Corner Adhesive Tape) - 150mm x 30m | Insulation Merchant
    CONTEGA by Pro Clima

    Pro Clima Contega Solido SL150 (Internal Single-sIded Corner Adhesive Tape) - 150mm x 30m

    £97.30 per item
    £3.24 per LM (linear metre)
    inc. VAT
    £81.08 per item
    £2.70 per LM (linear metre)
    ex. VAT
    Save £-97.30
    £97.30 per item
    £3.24 per LM (linear metre)
    inc. VAT
    £0.00 Save £-81.08
    £81.08 per item
    £2.70 per LM (linear metre)
    ex. VAT
  • ROTHOBLAAS Seal Band Airtightness Tape (60mm x 25m)
    Internal Use
    SEAL BAND by Rothoblaas

    ROTHOBLAAS Seal Band Airtightness Tape (60mm x 25m)

    Looking for a price?

    Add to a quote for our best rate.

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

    Pro Clima Contega Fiden Exo (Expansion Joint Tape) - Joint 5-10mm (Roll 20mm x 5.6m)

    £9.57 per item
    inc. VAT
    £7.98 per item
    ex. VAT
    Save £-9.57
    £9.57 per item
    inc. VAT
    £0.00 Save £-7.98
    £7.98 per item
    ex. VAT
  • Pro Clima Dasatop - 1.5m x 50m (75m²) | Insulation Merchant
    DASATOP by Pro Clima

    Pro Clima Dasatop - 1.5m x 50m (75m²)

    £222.15 per item
    £2.96 per m²
    inc. VAT
    £185.13 per item
    £2.47 per m²
    ex. VAT
    £0.00 Save £-222.15
    £222.15 per item
    £2.96 per m²
    inc. VAT
    £0.00 Save £-185.13
    £185.13 per item
    £2.47 per m²
    ex. VAT
  • Pro Clima Roflex 150 - Airtight Pipe Grommet (Pack of 10) | Insulation Merchant
    ROFLEX by Pro Clima

    Pro Clima Roflex 150 - Airtight Pipe Grommet (Pack of 10)

    £65.59 per item
    £6.55 per ea
    inc. VAT
    £54.66 per item
    £5.47 per ea
    ex. VAT
    £0.00 Save £-65.59
    £65.59 per item
    £6.55 per ea
    inc. VAT
    £0.00 Save £-54.66
    £54.66 per item
    £5.47 per ea
    ex. VAT
  • Pro Clima Contega Fiden Exo (Expansion Joint Tape) - Joint 10-18mm - Roll 20mm x 2.6m | Insulation Merchant
    CONTEGA by Pro Clima

    Pro Clima Contega Fiden Exo (Expansion Joint Tape) - Joint 10-18mm - Roll 20mm x 2.6m

    £9.22 per item
    inc. VAT
    £7.68 per item
    ex. VAT
    Save £-9.22
    £9.22 per item
    inc. VAT
    £0.00 Save £-7.68
    £7.68 per item
    ex. VAT
  • Pro Clima Extoseal Encors - 200mm x 20m | Insulation Merchant
    EXTOSEAL by Pro Clima

    Pro Clima Extoseal Encors - 200mm x 20m

    £201.95 per item
    inc. VAT
    £168.29 per item
    ex. VAT
    Save £-201.95
    £201.95 per item
    inc. VAT
    £0.00 Save £-168.29
    £168.29 per item
    ex. VAT
  • SIGA Majvest® 700 SOB - Open Facade Membrane (1.5m x 33.4m) | Insulation Merchant
    MAJVEST® by SIGA

    SIGA Majvest® 700 SOB - Open Facade Membrane (1.5m x 33.4m)

    £378.96 per item
    £7.56 per m²
    inc. VAT
    £315.80 per item
    £6.30 per m²
    ex. VAT
    Save £-378.96
    £378.96 per item
    £7.56 per m²
    inc. VAT
    £0.00 Save £-315.80
    £315.80 per item
    £6.30 per m²
    ex. VAT
  • Pro Clima DB+ - 1.35m x 50m | Insulation Merchant
    DB+ by Pro Clima

    Pro Clima DB+ - 1.35m x 50m

    £213.05 per item
    £3.16 per m²
    inc. VAT
    £177.54 per item
    £2.63 per m²
    ex. VAT
    £0.00 Save £-213.05
    £213.05 per item
    £3.16 per m²
    inc. VAT
    £0.00 Save £-177.54
    £177.54 per item
    £2.63 per m²
    ex. VAT
  • Pro Clima Tescon Invis - 100mm x 30m | Insulation Merchant
    TESCON by Pro Clima

    Pro Clima Tescon Invis - 100mm x 30m

    £57.75 per item
    £1.92 per LM (linear metre)
    inc. VAT
    £48.13 per item
    £1.60 per LM (linear metre)
    ex. VAT
    Save £-57.75
    £57.75 per item
    £1.92 per LM (linear metre)
    inc. VAT
    £0.00 Save £-48.13
    £48.13 per item
    £1.60 per LM (linear metre)
    ex. VAT
  • SIGA Rissan® 100 VCL & Jointing Airtightness Tape - 100mm x 25m | Insulation Merchant
    RISSAN® by SIGA

    SIGA Rissan® 100 VCL & Jointing Airtightness Tape - 100mm x 25m

    £55.80 per item
    £2.23 per LM (linear metre)
    inc. VAT
    £46.50 per item
    £1.86 per LM (linear metre)
    ex. VAT
    Save £-55.80
    £55.80 per item
    £2.23 per LM (linear metre)
    inc. VAT
    £0.00 Save £-46.50
    £46.50 per item
    £1.86 per LM (linear metre)
    ex. VAT
  • 3m Pro Clima Intello Plus - Vapour Check Membrane (50m) | Insulation Merchant
    INTELLO by Pro Clima

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

    £603.84 per item
    £4.02 per m²
    inc. VAT
    £503.20 per item
    £3.35 per m²
    ex. VAT
    £0.00 Save £-603.84
    £603.84 per item
    £4.02 per m²
    inc. VAT
    £0.00 Save £-503.20
    £503.20 per item
    £3.35 per m²
    ex. VAT
  • SIGA Fentrim® IS 20 (Pre-folded Internal Corner Tape) - All sizes | Insulation Merchant
    Internal Use
    FENTRIM® by SIGA

    SIGA Fentrim® IS 20 (Pre-folded Internal Corner Tape) - All sizes

    From £54.05 per item
    £2.16 per LM (linear metre)
    inc. VAT
    From £45.04 per item
    £1.80 per LM (linear metre)
    ex. VAT
    Save £-54.05
    From £54.05 per item
    £2.16 per LM (linear metre)
    inc. VAT
    £0.00 Save £-45.04
    From £45.04 per item
    £1.80 per LM (linear metre)
    ex. VAT
  • SIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade) | Insulation Merchant
    MAJVEST® by SIGA

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

    £195.45 per item
    £2.60 per m²
    inc. VAT
    £162.88 per item
    £2.17 per m²
    ex. VAT
    Save £-195.45
    £195.45 per item
    £2.60 per m²
    inc. VAT
    £0.00 Save £-162.88
    £162.88 per item
    £2.17 per m²
    ex. VAT
  • Pro Clima Roflex 30 - Airtight Pipe Grommet (Pack of 10) | Insulation Merchant
    ROFLEX by Pro Clima

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

    £41.09 per item
    £4.10 per ea
    inc. VAT
    £34.24 per item
    £3.42 per ea
    ex. VAT
    £0.00 Save £-41.09
    £41.09 per item
    £4.10 per ea
    inc. VAT
    £0.00 Save £-34.24
    £34.24 per item
    £3.42 per ea
    ex. VAT