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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Pro Clima Contega Solido SL-D100 (External Double-sIded Corner Adhesive Tape) - 100mm x 30m
CONTEGA SOLIDO SL-D by Pro ClimaPro Clima Contega Solido SL-D100 (External Double-sIded Corner Adhesive Tape) - 100mm x 30m
- Regular price
- £66.17 per item
- Unit Price
- £2.20 per LM (linear metre)
- Regular price
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£68.00Save £1.83 - Sale price
- £66.17 per item
- Unit Price
- £2.20 per LM (linear metre)
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SIGA Fentrim® IS 2 (Pre-folded External Corner Tape)
FENTRIM® by SIGASIGA Fentrim® IS 2 (Pre-folded External Corner Tape)
- Regular price
- From £47.33 per item
- Unit Price
- £1.89 per LM (linear metre)
- Regular price
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- Sale price
- From £47.33 per item
- Unit Price
- £1.89 per LM (linear metre)
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100mm STEICO Flex 036 - 575mm x 1190mm - PALLET OF 10
FLEX by Steico100mm STEICO Flex 036 - 575mm x 1190mm - PALLET OF 10
- Regular price
- £348.75 per item
- Unit Price
- £12.45 per m²
- Regular price
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£387.50Save £38.75 - Sale price
- £348.75 per item
- Unit Price
- £12.45 per m²
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SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²)
MAJCOAT® by SIGASIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²)
- Regular price
- £184.08 per item
- Unit Price
- £2.45 per m²
- Regular price
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- Sale price
- £184.08 per item
- Unit Price
- £2.45 per m²
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SIGA Majcoat® 350 Diffusion-open Breathable "Bat-friendly" Roof Membrane
MAJCOAT® by SIGASIGA Majcoat® 350 Diffusion-open Breathable "Bat-friendly" Roof Membrane
- Regular price
- £457.88 per item
- Unit Price
- £9.14 per m²
- Regular price
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- Sale price
- £457.88 per item
- Unit Price
- £9.14 per m²
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100mm Thermafleece Supasoft Roll (3 x 390mm rolls) - 5.90m²
SUPASOFT by Thermafleece100mm Thermafleece Supasoft Roll (3 x 390mm rolls) - 5.90m²
- Regular price
- £48.67 per item
- Unit Price
- £8.25 per m²
- Regular price
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- Sale price
- £48.67 per item
- Unit Price
- £8.25 per m²
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50mm Thermafleece Supasoft Roll (2 x 590mm rolls)
SUPASOFT by Thermafleece50mm Thermafleece Supasoft Roll (2 x 590mm rolls)
- Regular price
- £48.67 per item
- Unit Price
- £4.12 per m²
- Regular price
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- Sale price
- £48.67 per item
- Unit Price
- £4.12 per m²
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PROCTOR Spacetherm® Multi Board-Walls Laminate (Aerogel + MgO) - 2400mm x 1200mm
SPACETHERM® by A. Proctor GroupPROCTOR Spacetherm® Multi Board-Walls Laminate (Aerogel + MgO) - 2400mm x 1200mm
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Add to a quote for our best rate.
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100mm Thermafleece CosyWool Sheep Wool Slab (390mm wide) (OLD SIZE)
COSYWOOL SLAB by Thermafleece100mm Thermafleece CosyWool Sheep Wool Slab (390mm wide) (OLD SIZE)
Looking for a price?
Add to a quote for our best rate.
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50mm Thermafleece Supasoft Roll (3 x 390mm rolls)
SUPASOFT by Thermafleece50mm Thermafleece Supasoft Roll (3 x 390mm rolls)
- Regular price
- £48.67 per item
- Unit Price
- £8.25 per m²
- Regular price
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- Sale price
- £48.67 per item
- Unit Price
- £8.25 per m²
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80mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 28)
THERM (WET) by Steico80mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 28)
This product is not available.
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SIGA Primur® Cartridge Bonding Adhesive (310ml)
PRIMUR® by SIGASIGA Primur® Cartridge Bonding Adhesive (310ml)
- Regular price
- £10.63 per item
- Unit Price
- £34.29 per litres
- Regular price
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- Sale price
- £10.63 per item
- Unit Price
- £34.29 per litres
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SIGA Fentrim® 2 (Pre-folded External Corner Tape) - All sizes
FENTRIM® by SIGASIGA Fentrim® 2 (Pre-folded External Corner Tape) - All sizes
- Regular price
- From £57.79 per item
- Unit Price
- £2.31 per LM (linear metre)
- Regular price
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- Sale price
- From £57.79 per item
- Unit Price
- £2.31 per LM (linear metre)
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50mm Thermafleece CosyWool Sheep Wool Slab (390mm wide) (OLD SIZE)
COSYWOOL SLAB by Thermafleece50mm Thermafleece CosyWool Sheep Wool Slab (390mm wide) (OLD SIZE)
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Add to a quote for our best rate.
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Lime Green Solo Onecoat Lime Plaster - 25kg
SOLO ONECOAT by Lime GreenLime Green Solo Onecoat Lime Plaster - 25kg
Looking for a price?
Add to a quote for our best rate.
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SIGA Farmer Waterproof High Performance Multi-purpose Tape - 60mm x 15m
FARMER by SIGASIGA Farmer Waterproof High Performance Multi-purpose Tape - 60mm x 15m
- Regular price
- £18.25 per item
- Unit Price
- £1.21 per LM (linear metre)
- Regular price
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- Sale price
- £18.25 per item
- Unit Price
- £1.21 per LM (linear metre)
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50mm Thermafleece UltraWool Slab (590mm wide)
ULTRAWOOL by Thermafleece50mm Thermafleece UltraWool Slab (590mm wide)
- Regular price
- £171.85 per item
- Unit Price
- £12.14 per m²
- Regular price
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- Sale price
- £171.85 per item
- Unit Price
- £12.14 per m²
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100mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE)
COSYWOOL SLAB by Thermafleece100mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE)
Looking for a price?
Add to a quote for our best rate.
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100mm Thermafleece NatraHemp Slab (370mm wide)
NATRAHEMP by Thermafleece100mm Thermafleece NatraHemp Slab (370mm wide)
Looking for a price?
Add to a quote for our best rate.
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120mm STEICO Protect M (dry) - 1325mm x 600mm
PROTECT M (DRY) by Steico120mm STEICO Protect M (dry) - 1325mm x 600mm
This product is not available.
