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
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  • Lime Green Forte (Render Base Coat) - 25kg | Insulation Merchant
    FORTE by Lime Green

    Lime Green Forte (Render Base Coat) - 25kg

    £28.50 inc. VAT
    £23.75 ex. VAT
    £28.50 inc. VAT
    Save £-28.50
    £23.75 ex. VAT
    £0.00 Save £-23.75
  • Lime Green Duro Lime (Plaster Base Coat) - 25kg | Insulation Merchant
    DURO by Lime Green

    Lime Green Duro Lime (Plaster Base Coat) - 25kg

    £ Looking for a price?

    Add to a quote for our best rate.

  • 26mm PROCTOR Spacetherm® Multi Laminate (Aerogel + MgO) - 2400mm x 1200mm | Insulation Merchant
    SPACETHERM® by A. Proctor Group

    PROCTOR Spacetherm® Multi Board-Floors Laminate (Aerogel + MgO) - 1200mm x 595mm

    £ Looking for a price?

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  • 10mm PROCTOR Spacetherm® A1 Fire Rated Silica Aerogel Blanket - 2400mm x 1200mm (2.88m²) | Insulation Merchant
    Made to Order
    SPACETHERM® by A. Proctor Group

    PROCTOR Spacetherm® A1 Silica Aerogel Blanket [Made to Order Sizes] - 2400mm x 1200mm (2.88m²)

    £ Looking for a price?

    Add to a quote for our best rate.

  • 70mm Thermafleece UltraWool Slab (590mm wide) | Insulation Merchant 70mm Thermafleece UltraWool Slab (590mm wide) | Insulation Merchant
    ULTRAWOOL by Thermafleece

    70mm Thermafleece UltraWool Slab (590mm wide)

    £ Looking for a price?

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  • 70mm Thermafleece NatraHemp Slab (370mm wide) | Insulation Merchant 70mm Thermafleece NatraHemp Slab (370mm wide) | Insulation Merchant
    NATRAHEMP by Thermafleece

    70mm Thermafleece NatraHemp Slab (370mm wide)

    £ Looking for a price?

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  • 50mm Thermafleece NatraHemp Slab (370mm wide) | Insulation Merchant 50mm Thermafleece NatraHemp Slab (370mm wide) | Insulation Merchant
    NATRAHEMP by Thermafleece

    50mm Thermafleece NatraHemp Slab (370mm wide)

    £ Looking for a price?

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  • 50mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE) | Insulation Merchant 50mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE) | Insulation Merchant
    COSYWOOL SLAB by Thermafleece

    50mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE)

    £ Looking for a price?

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  • 140mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE) | Insulation Merchant 140mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE) | Insulation Merchant
    Alternative Now Available
    COSYWOOL by Thermafleece

    140mm 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 - 570mm wide (10.94m²) | Insulation Merchant 100mm Thermafleece NatraHemp Slab - 570mm wide (10.94m²) | Insulation Merchant
    NATRAHEMP by Thermafleece

    100mm Thermafleece NatraHemp Slab - 570mm wide (10.94m²)

    £ Looking for a price?

    Add to a quote for our best rate.

  • SIGA Primur Roll (Flexible Membrane Seal) | Insulation Merchant
    Spring Savings
    PRIMUR by SIGA

    SIGA Primur Roll (Flexible Membrane Seal)

    £21.00 inc. VAT
    £2.62 per LM (linear metre)
    £17.50 ex. VAT
    £2.19 per LM (linear metre)
    £21.00 inc. VAT
    £2.62 per LM (linear metre)
    Save £-21.00
    £17.50 ex. VAT
    £2.19 per LM (linear metre)
    £0.00 Save £-17.50
  • SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m) | Insulation Merchant SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m) | Insulation Merchant
    Spring Savings
    MAJVEST® 500 SA by SIGA

    SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m)

    £575.95 inc. VAT
    £12.43 per m²
    £479.96 ex. VAT
    £10.36 per m²
    £575.95 inc. VAT
    £12.43 per m²
    Save £-575.95
    £479.96 ex. VAT
    £10.36 per m²
    £0.00 Save £-479.96
  • SIGA Majpell® 25 Vapour Control Layer - 1.5m x 50m (75m²) | Insulation Merchant SIGA Majpell® 25 Vapour Control Layer - 1.5m x 50m (75m²) | Insulation Merchant
    Spring Savings
    MAJPELL® 25 by SIGA

    SIGA Majpell® 25 Vapour Control Layer - 1.5m x 50m (75m²)

    £224.70 inc. VAT
    £2.99 per m²
    £187.25 ex. VAT
    £2.50 per m²
    £224.70 inc. VAT
    £2.99 per m²
    Save £-224.70
    £187.25 ex. VAT
    £2.50 per m²
    £0.00 Save £-187.25
  • SIGA Majcoat® 350 Diffusion-open Breathable Roof Membrane | Insulation Merchant SIGA Majcoat® 350 Diffusion-open Breathable Roof Membrane | Insulation Merchant
    Sale 6%
    Spring Savings
    Bat Friendly
    MAJCOAT® 350 by SIGA

    SIGA Majcoat® 350 Diffusion-open Breathable "Bat-friendly" Roof Membrane

    £549.45 inc. VAT
    £10.97 per m²
    £457.88 ex. VAT
    £9.14 per m²
    £549.45 inc. VAT
    £10.97 per m²
    £588.00 Save £38.55
    £457.88 ex. VAT
    £9.14 per m²
    £490.00 Save £32.13
  • SIGA | Insulation Merchant
    Spring Savings
    Internal Use
    FENTRIM® 20 by SIGA

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

    From £65.60 inc. VAT
    £2.62 per LM (linear metre)
    From £54.67 ex. VAT
    £2.19 per LM (linear metre)
    From £65.60 inc. VAT
    £2.62 per LM (linear metre)
    Save £-65.60
    From £54.67 ex. VAT
    £2.19 per LM (linear metre)
    £0.00 Save £-54.67
  • 25mm SKANDA Savolit Plus Wood Wool Board - 2000 x 600mm | Insulation Merchant 25mm SKANDA Savolit Plus Wood Wool Board - 2000 x 600mm | Insulation Merchant
    SAVOLIT PLUS - 2000MM by Skanda Savolit

    25mm SKANDA Savolit Plus Wood Wool Board - 2000 x 600mm

    £ Looking for a price?

    Add to a quote for our best rate.

  • 100mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 22) | Insulation Merchant 100mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 22) | Insulation Merchant
    Sale 10%
    Spring Savings
    THERM WET by Steico

    100mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 22)

    £472.50 inc. VAT
    £583.33 per m²
    £393.75 ex. VAT
    £486.11 per m²
    £472.50 inc. VAT
    £583.33 per m²
    £525.00 Save £52.50
    £393.75 ex. VAT
    £486.11 per m²
    £437.50 Save £43.75
  • 140mm STEICO Protect M Dry - 3000mm x 2400m | Insulation Merchant
    Spring Savings
    PROTECT M DRY by Steico

    140mm STEICO Protect M Dry - 3000mm x 2400m

    £ Looking for a price?

    Add to a quote for our best rate.