Retrofit

Our expertise lies in providing advanced Retrofit solutions for both internal and external wall insulation, ensuring your home stays cosy while saving you money on energy bills.

With our wide range of wood fibre insulation, you can rely on year-round comfort. It keeps your house warm during chilly winters and pleasantly cool throughout the summer months.

Choose Insulation Merchant for a more comfortable, energy-efficient home that you'll love living in!

Retrofit Insulation | Insulation Merchant
Clear all filters

Showing 117 of 117 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 – £3,726.52
Filter and sort

Filter and sort

Showing 117 of 117 products

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

Up to £3,726.52

Clear
Clear all filters
Clear all filters
Showing 117 of 117 products
  • 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
  • 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
  • 100mm STEICO Flex 036 - 575mm x 1190mm - PALLET OF 10 | Insulation Merchant
    Sale 10%
    FLEX by Steico

    100mm STEICO Flex 036 - 575mm x 1190mm - PALLET OF 10

    £418.50 per item
    £14.94 per m²
    inc. VAT
    £348.75 per item
    £12.46 per m²
    ex. VAT
    £465.00 Save £46.50
    £418.50 per item
    £14.94 per m²
    inc. VAT
    £387.50 Save £38.75
    £348.75 per item
    £12.46 per m²
    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
  • SIGA Majcoat® 350 Diffusion-open Breathable Roof Membrane | Insulation Merchant
    Bat Friendly
    MAJCOAT® by SIGA

    SIGA Majcoat® 350 Diffusion-open Breathable "Bat-friendly" 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
  • 100mm Thermafleece Supasoft Roll (3 x 390mm rolls) - 5.90m²| Insulation Merchant
    SUPASOFT by Thermafleece

    100mm Thermafleece Supasoft Roll (3 x 390mm rolls) - 5.90m²

    £58.40 per item
    £9.90 per m²
    inc. VAT
    £48.67 per item
    £8.25 per m²
    ex. VAT
    Save £-58.40
    £58.40 per item
    £9.90 per m²
    inc. VAT
    £0.00 Save £-48.67
    £48.67 per item
    £8.25 per m²
    ex. VAT
  • 50mm Thermafleece Supasoft Roll (2 x 590mm rolls) | Insulation Merchant
    SUPASOFT by Thermafleece

    50mm Thermafleece Supasoft Roll (2 x 590mm rolls)

    £58.40 per item
    £4.95 per m²
    inc. VAT
    £48.67 per item
    £4.12 per m²
    ex. VAT
    Save £-58.40
    £58.40 per item
    £4.95 per m²
    inc. VAT
    £0.00 Save £-48.67
    £48.67 per item
    £4.12 per m²
    ex. VAT
  • 26mm PROCTOR Spacetherm® Multi Laminate (Aerogel + MgO) - 2400mm x 1200mm | Insulation Merchant
    SPACETHERM® by A. Proctor Group

    PROCTOR Spacetherm® Multi Board-Walls Laminate (Aerogel + MgO) - 2400mm x 1200mm

    Looking for a price?

    Add to a quote for our best rate.

  • 100mm Thermafleece CosyWool Sheep Wool Slab (390mm wide) (OLD SIZE) | Insulation Merchant
    Alternative Now Available
    COSYWOOL SLAB by Thermafleece

    100mm Thermafleece CosyWool Sheep Wool Slab (390mm wide) (OLD SIZE)

    Looking for a price?

    Add to a quote for our best rate.

  • 50mm Thermafleece Supasoft Roll (3 x 390mm rolls) | Insulation Merchant
    SUPASOFT by Thermafleece

    50mm Thermafleece Supasoft Roll (3 x 390mm rolls)

    £58.40 per item
    £9.90 per m²
    inc. VAT
    £48.67 per item
    £8.25 per m²
    ex. VAT
    Save £-58.40
    £58.40 per item
    £9.90 per m²
    inc. VAT
    £0.00 Save £-48.67
    £48.67 per item
    £8.25 per m²
    ex. VAT
  • 80mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 28) | Insulation Merchant
    THERM (WET) by Steico

    80mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 28)

    This product is not available.

    Enquire for more information and advice.

  • 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
  • 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
  • 50mm Thermafleece CosyWool Sheep Wool Slab (390mm wide) (OLD SIZE) | Insulation Merchant
    Alternative Now Available
    COSYWOOL SLAB by Thermafleece

    50mm Thermafleece CosyWool Sheep Wool Slab (390mm wide) (OLD SIZE)

    Looking for a price?

    Add to a quote for our best rate.

  • Lime Green Solo Onecoat Lime Plaster - 25kg | Insulation Merchant
    SOLO ONECOAT by Lime Green

    Lime Green Solo Onecoat Lime Plaster - 25kg

    Looking for a price?

    Add to a quote for our best rate.

  • 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
  • 50mm Thermafleece UltraWool Slab (590mm wide) | Insulation Merchant
    ULTRAWOOL by Thermafleece

    50mm Thermafleece UltraWool Slab (590mm wide)

    £206.22 per item
    £14.56 per m²
    inc. VAT
    £171.85 per item
    £12.14 per m²
    ex. VAT
    Save £-206.22
    £206.22 per item
    £14.56 per m²
    inc. VAT
    £0.00 Save £-171.85
    £171.85 per item
    £12.14 per m²
    ex. VAT
  • 100mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE) | Insulation Merchant
    Alternative Now Available
    COSYWOOL SLAB by Thermafleece

    100mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE)

    Looking for a price?

    Add to a quote for our best rate.

  • 100mm Thermafleece NatraHemp Slab (370mm wide) | Insulation Merchant
    NATRAHEMP by Thermafleece

    100mm Thermafleece NatraHemp Slab (370mm wide)

    Looking for a price?

    Add to a quote for our best rate.

  • 120mm STEICO Protect M Dry - 1325mm x 600mm | Insulation Merchant
    PROTECT M (DRY) by Steico

    120mm STEICO Protect M (dry) - 1325mm x 600mm

    This product is not available.

    Enquire for more information and advice.