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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100mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE)
COSYWOOL SLAB by Thermafleece100mm Thermafleece CosyWool Sheep Wool Slab (590mm wide) (OLD SIZE)
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100mm Thermafleece NatraHemp Slab (370mm wide)
NATRAHEMP by Thermafleece100mm Thermafleece NatraHemp Slab (370mm wide)
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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.
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SIGA Fentrim® 2 50/85 (Pre-folded External Corner Tape) - 25m
FENTRIM® by SIGASIGA Fentrim® 2 50/85 (Pre-folded External Corner Tape) - 25m
- Regular price
- £88.80 per item
- Unit Price
- £3.55 per LM (linear metre)
- Ex-Vat Price
- £74.00 per item
- Unit Price
- £2.96 per LM (linear metre)
- Regular price
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- Sale price
- £88.80 per item
- Unit Price
- £3.55 per LM (linear metre)
- Regular price
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£0.00Save £-74.00 - Ex-VAT Price
- £74.00 per item
- Unit Price
- £2.96 per LM (linear metre)
inc. VATex. VATinc. VATex. VAT -
SIGA Majcoat® 150 SOB Breather Membrane - 1.5m x 50m
MAJCOAT® by SIGASIGA Majcoat® 150 SOB Breather Membrane - 1.5m x 50m
- Regular price
- £296.90 per item
- Unit Price
- £3.95 per m²
- Ex-Vat Price
- £247.42 per item
- Unit Price
- £3.30 per m²
- Regular price
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- Sale price
- £296.90 per item
- Unit Price
- £3.95 per m²
- Regular price
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£0.00Save £-247.42 - Ex-VAT Price
- £247.42 per item
- Unit Price
- £3.30 per m²
inc. VATex. VATinc. VATex. VAT -
SIGA Fentrim® 330 Grey Adhesive Tape - 150mm
FENTRIM® by SIGASIGA Fentrim® 330 Grey Adhesive Tape - 150mm
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50mm Thermafleece NatraHemp Slab (570mm wide)
NATRAHEMP by Thermafleece50mm Thermafleece NatraHemp Slab (570mm wide)
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Add to a quote for our best rate.
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140mm Thermafleece CosyWool Sheep Wool Slab (390mm wide) (OLD SIZE)
COSYWOOL SLAB by Thermafleece140mm 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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70mm Thermafleece UltraWool Slab (390mm wide)
ULTRAWOOL by Thermafleece70mm Thermafleece UltraWool Slab (390mm wide)
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Add to a quote for our best rate.
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100mm STEICO Protect M (dry) - 1325mm x 600mm
PROTECT M (DRY) by Steico100mm STEICO Protect M (dry) - 1325mm x 600mm
This product is not available.
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35mm SKANDA Savolit Plus Wood Wool Board - 2000 x 600mm
SAVOLIT PLUS - 2000MM by Skanda Savolit35mm SKANDA Savolit Plus Wood Wool Board - 2000 x 600mm
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140mm STEICO Protect M (dry) - 1325mm x 600mm
PROTECT M (DRY) by Steico140mm STEICO Protect M (dry) - 1325mm x 600mm
This product is not available.
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SIGA Primur Roll (Flexible Membrane Seal)
PRIMUR® by SIGASIGA Primur Roll (Flexible Membrane Seal)
- Regular price
- £21.00 per item
- Unit Price
- £2.62 per LM (linear metre)
- Ex-Vat Price
- £17.50 per item
- Unit Price
- £2.19 per LM (linear metre)
- Regular price
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- Sale price
- £21.00 per item
- Unit Price
- £2.62 per LM (linear metre)
- Regular price
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£0.00Save £-17.50 - Ex-VAT Price
- £17.50 per item
- Unit Price
- £2.19 per LM (linear metre)
inc. VATex. VATinc. VATex. VAT -
PROCTOR Spacetherm® Wallboard Laminate (Aerogel + Plasterboard) without VCL - 2400mm x 1200mm
SPACETHERM® by A. Proctor GroupPROCTOR Spacetherm® Wallboard Laminate (Aerogel + Plasterboard) without VCL - 2400mm x 1200mm
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STEICO Flex - 575mm x 1190mm x 90mm (3.42m² p/pk)
FLEX by SteicoSTEICO Flex - 575mm x 1190mm x 90mm (3.42m² p/pk)
- Regular price
- £51.26 per item
- Unit Price
- £18.73 per m²
- Ex-Vat Price
- £42.72 per item
- Unit Price
- £15.61 per m²
- Regular price
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- Sale price
- £51.26 per item
- Unit Price
- £18.73 per m²
- Regular price
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£0.00Save £-42.72 - Ex-VAT Price
- £42.72 per item
- Unit Price
- £15.61 per m²
inc. VATex. VATinc. VATex. VAT -
50mm Thermafleece UltraWool Slab (390mm wide)
ULTRAWOOL by Thermafleece50mm Thermafleece UltraWool Slab (390mm wide)
- Regular price
- £229.03 per item
- Unit Price
- £16.31 per m²
- Ex-Vat Price
- £190.86 per item
- Unit Price
- £13.59 per m²
- Regular price
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- Sale price
- £229.03 per item
- Unit Price
- £16.31 per m²
- Regular price
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£0.00Save £-190.86 - Ex-VAT Price
- £190.86 per item
- Unit Price
- £13.59 per m²
inc. VATex. VATinc. VATex. VAT -
70mm Thermafleece NatraHemp Slab (570mm wide)
NATRAHEMP by Thermafleece70mm Thermafleece NatraHemp Slab (570mm wide)
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Add to a quote for our best rate.
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100mm Thermafleece NatraHemp Slab - 570mm wide (10.94m²)
NATRAHEMP by Thermafleece100mm Thermafleece NatraHemp Slab - 570mm wide (10.94m²)
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Add to a quote for our best rate.
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60mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 38)
THERM (WET) by Steico60mm STEICO Therm (wet) - 600mm x 1350mm (Pallet of 38)
This product is not available.
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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)
This product is not available.
