Collection: 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!
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Lime Green Forte (Render Base Coat) - 25kg
FORTE by Lime GreenLime Green Forte (Render Base Coat) - 25kg
- Regular price
- £23.75
- Sale price
- £23.75
- Regular price
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Lime Green Duro Lime (Plaster Base Coat) - 25kg
DURO by Lime GreenLime Green Duro Lime (Plaster Base Coat) - 25kg
£ Looking for a price?
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PROCTOR Spacetherm® Multi Board-Floors Laminate (Aerogel + MgO) - 1200mm x 595mm
SPACETHERM® by A. Proctor GroupPROCTOR Spacetherm® Multi Board-Floors Laminate (Aerogel + MgO) - 1200mm x 595mm
£ Looking for a price?
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PROCTOR Spacetherm® A1 Silica Aerogel Blanket [Made to Order Sizes] - 2400mm x 1200mm (2.88m²)
SPACETHERM® by A. Proctor GroupPROCTOR Spacetherm® A1 Silica Aerogel Blanket [Made to Order Sizes] - 2400mm x 1200mm (2.88m²)
£ Looking for a price?
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70mm Thermafleece UltraWool Slab (590mm wide)
ULTRAWOOL by Thermafleece70mm Thermafleece UltraWool Slab (590mm wide)
£ Looking for a price?
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70mm Thermafleece NatraHemp Slab (370mm wide)
NATRAHEMP by Thermafleece70mm Thermafleece NatraHemp Slab (370mm wide)
£ Looking for a price?
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50mm Thermafleece NatraHemp Slab (370mm wide)
NATRAHEMP by Thermafleece50mm Thermafleece NatraHemp Slab (370mm wide)
£ Looking for a price?
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50mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE)
COSYWOOL SLAB by Thermafleece50mm 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)
COSYWOOL by Thermafleece140mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE)
£ Looking for a price?
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100mm Thermafleece NatraHemp Slab - 570mm wide (10.94m²)
NATRAHEMP by Thermafleece100mm Thermafleece NatraHemp Slab - 570mm wide (10.94m²)
£ Looking for a price?
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SIGA Primur Roll (Flexible Membrane Seal)
PRIMUR by SIGASIGA Primur Roll (Flexible Membrane Seal)
- Regular price
- £17.50
- Unit Price
- £2.18 per LM (linear metre)
- Sale price
- £17.50
- Unit Price
- £2.18 per LM (linear metre)
- Regular price
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SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m)
MAJVEST® 500 SA by SIGASIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m)
- Regular price
- £479.96
- Unit Price
- £10.36 per m²
- Sale price
- £479.96
- Unit Price
- £10.36 per m²
- Regular price
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SIGA Majpell® 25 Vapour Control Layer - 1.5m x 50m (75m²)
MAJPELL® 25 by SIGASIGA Majpell® 25 Vapour Control Layer - 1.5m x 50m (75m²)
- Regular price
- £187.25
- Unit Price
- £2.49 per m²
- Sale price
- £187.25
- Unit Price
- £2.49 per m²
- Regular price
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SIGA Majcoat® 350 Diffusion-open Breathable "Bat-friendly" Roof Membrane
MAJCOAT® 350 by SIGASIGA Majcoat® 350 Diffusion-open Breathable "Bat-friendly" Roof Membrane
- Regular price
- £457.88
- Unit Price
- £9.14 per m²
- Sale price
- £457.88
- Unit Price
- £9.14 per m²
- Regular price
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£490.00Save £32.12
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SIGA Fentrim® 20 (Pre-folded Internal Corner Tape) - All sizes
FENTRIM® 20 by SIGASIGA Fentrim® 20 (Pre-folded Internal Corner Tape) - All sizes
- Regular price
- From £54.67
- Unit Price
- £2.18 per LM (linear metre)
- Sale price
- From £54.67
- Unit Price
- £2.18 per LM (linear metre)
- Regular price
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25mm SKANDA Savolit Plus Wood Wool Board - 2000 x 600mm
SAVOLIT PLUS - 2000MM by Skanda Savolit25mm SKANDA Savolit Plus Wood Wool Board - 2000 x 600mm
£ Looking for a price?
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100mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 22)
THERM WET by Steico100mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 22)
- Regular price
- £393.75
- Unit Price
- £486.11 per m²
- Sale price
- £393.75
- Unit Price
- £486.11 per m²
- Regular price
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£437.50Save £43.75
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140mm STEICO Protect M Dry - 3000mm x 2400m
PROTECT M DRY by Steico140mm STEICO Protect M Dry - 3000mm x 2400m
£ Looking for a price?
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