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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60mm STEICO Therm (wet) - 600mm x 1350mm - per board
THERM (WET) by Steico60mm STEICO Therm (wet) - 600mm x 1350mm - per board
This product is not available.
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Pro Clima Contega Solido SL150 (Internal Single-sIded Corner Adhesive Tape) - 150mm x 30m
CONTEGA SOLIDO SL by Pro ClimaPro Clima Contega Solido SL150 (Internal Single-sIded Corner Adhesive Tape) - 150mm x 30m
- Regular price
- £74.08 per item
- Unit Price
- £2.46 per LM (linear metre)
- Regular price
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£76.10Save £2.02 - Sale price
- £74.08 per item
- Unit Price
- £2.46 per LM (linear metre)
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100mm Thermafleece Supasoft Insulation (2 x 590mm rolls) - 5.90m²
SUPASOFT by Thermafleece100mm Thermafleece Supasoft Insulation (2 x 590mm 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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SIGA Majvest® 700 SOB - Open Facade Membrane (1.5m x 33.4m)
MAJVEST® by SIGASIGA Majvest® 700 SOB - Open Facade Membrane (1.5m x 33.4m)
- Regular price
- £315.80 per item
- Unit Price
- £6.30 per m²
- Regular price
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- Sale price
- £315.80 per item
- Unit Price
- £6.30 per m²
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SIGA Fentrim® IS 20 (Pre-folded Internal Corner Tape) - All sizes
FENTRIM® by SIGASIGA Fentrim® IS 20 (Pre-folded Internal Corner Tape) - All sizes
- Regular price
- From £45.04 per item
- Unit Price
- £1.80 per LM (linear metre)
- Regular price
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- Sale price
- From £45.04 per item
- Unit Price
- £1.80 per LM (linear metre)
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SIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade)
MAJVEST® by SIGASIGA Majvest® 200 - Breather Membrane (Particularly for Closed Facade)
- Regular price
- £162.88 per item
- Unit Price
- £2.17 per m²
- Regular price
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- Sale price
- £162.88 per item
- Unit Price
- £2.17 per m²
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60mm STEICOduo Dry - 600mm x 2230mm
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25mm Thermafleece CosyWool Sheep Wool (1 x 370mm roll)
COSYWOOL by Thermafleece25mm Thermafleece CosyWool Sheep Wool (1 x 370mm roll)
- Regular price
- £18.75 per item
- Unit Price
- £4.22 per m²
- Regular price
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£18.75Save £0.00 - Sale price
- £18.75 per item
- Unit Price
- £4.22 per m²
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SIGA Corvum® 30/30 - Pre-folded Corner Adhesive Tape (60mm x 25m)
CORVUM® by SIGASIGA Corvum® 30/30 - Pre-folded Corner Adhesive Tape (60mm x 25m)
- Regular price
- £41.04 per item
- Unit Price
- £1.64 per LM (linear metre)
- Regular price
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- Sale price
- £41.04 per item
- Unit Price
- £1.64 per LM (linear metre)
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SIGA Corvum® 12/48 Pre-folded Corner Adhesive Tape (60mm x 25m)
CORVUM® by SIGASIGA Corvum® 12/48 Pre-folded Corner Adhesive Tape (60mm x 25m)
- Regular price
- £41.04 per item
- Unit Price
- £1.64 per LM (linear metre)
- Regular price
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- Sale price
- £41.04 per item
- Unit Price
- £1.64 per LM (linear metre)
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3m Pro Clima Intello Plus - Vapour Check Membrane (50m)
INTELLO PLUS by Pro Clima3m Pro Clima Intello Plus - Vapour Check Membrane (50m)
- Regular price
- £446.58 per item
- Unit Price
- £2.97 per m²
- Regular price
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£498.50Save £51.92 - Sale price
- £446.58 per item
- Unit Price
- £2.97 per m²
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25mm Thermafleece CosyWool Sheep Wool (1 x 570mm roll)
COSYWOOL by Thermafleece
25mm Thermafleece CosyWool Sheep Wool (1 x 570mm roll)
- Regular price
- £28.88 per item
- Unit Price
- £4.22 per m²
- Regular price
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£28.88Save £0.00 - Sale price
- £28.88 per item
- Unit Price
- £4.22 per m²
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80mm STEICO Therm (wet) - 600mm x 1350mm - per board
THERM (WET) by Steico80mm STEICO Therm (wet) - 600mm x 1350mm - per board
This product is not available.
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100mm STEICO Therm (wet)- 600mm x 1350mm - per board
THERM (WET) by Steico100mm STEICO Therm (wet)- 600mm x 1350mm - per board
This product is not available.
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STEICO Internal (wet)
INTERNAL (WET) by SteicoSTEICO Internal (wet)
- Regular price
- From £5.20 per item
- Unit Price
- £11.40 per m²
- Regular price
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£0.00Save £-5.20 - Sale price
- From £5.20 per item
- Unit Price
- £11.40 per m²
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SIGA Fentrim® 20 50/85 (Pre-folded Internal Corner Tape) - 25m
FENTRIM® by SIGASIGA Fentrim® 20 50/85 (Pre-folded Internal Corner Tape) - 25m
- Regular price
- £72.83 per item
- Unit Price
- £2.91 per LM (linear metre)
- Regular price
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- Sale price
- £72.83 per item
- Unit Price
- £2.91 per LM (linear metre)
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PROCTOR Spacetherm® Cold Bridge Strip
SPACETHERM® by A. Proctor GroupPROCTOR Spacetherm® Cold Bridge Strip
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SIGA Meltell® 320 Black Hybrid Sealant (310ml cartridge)
MELTELL® by SIGASIGA Meltell® 320 Black Hybrid Sealant (310ml cartridge)
- Regular price
- £7.46 per item
- Unit Price
- £24.06 per litres
- Regular price
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- Sale price
- £7.46 per item
- Unit Price
- £24.06 per litres
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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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Lime Green Silic8 AF1 Aerogel Adhesive & Primer
SILIC8 by Lime GreenLime Green Silic8 AF1 Aerogel Adhesive & Primer
- Regular price
- From £91.58 per item
- Regular price
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- Sale price
- From £91.58 per item
