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 SL100 (Internal Single-sIded Corner Adhesive Tape) - 100mm x 30m
CONTEGA SOLIDO SL by Pro ClimaPro Clima Contega Solido SL100 (Internal Single-sIded Corner Adhesive Tape) - 100mm x 30m
- Regular price
- £50.33
- Unit Price
- £1.67 per LM (linear metre)
- Sale price
- £50.33
- Unit Price
- £1.67 per LM (linear metre)
- Regular price
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£51.70Save £1.37
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25mm SKANDA Savolit Plus Wood Wool Board - 1200 x 600mm
SAVOLIT PLUS - 1200MM by Skanda Savolit25mm SKANDA Savolit Plus Wood Wool Board - 1200 x 600mm
- Regular price
- £10.41
- Unit Price
- £14.46 per m²
- Sale price
- £10.41
- Unit Price
- £14.46 per m²
- Regular price
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80m Pro Clima Duplex Double Sided Membrane Tape
DUPLEX by Pro Clima80m Pro Clima Duplex Double Sided Membrane Tape
- Regular price
- £21.92
- Unit Price
- £0.27 per LM (linear metre)
- Sale price
- £21.92
- Unit Price
- £0.27 per LM (linear metre)
- Regular price
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£22.50Save £0.58
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20mm STEICO Therm SD (wet) - 600mm x 1350mm - per board
THERM SD WET by Steico20mm STEICO Therm SD (wet) - 600mm x 1350mm - per board
- Regular price
- £3.78
- Unit Price
- £4.67 per m²
- Sale price
- £3.78
- Unit Price
- £4.67 per m²
- Regular price
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£4.20Save £0.42
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75mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls)
COSYWOOL by Thermafleece75mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls)
- Regular price
- £81.17
- Unit Price
- £8.38 per m²
- Sale price
- £81.17
- Unit Price
- £8.38 per m²
- Regular price
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40mm STEICO Therm (wet) - 600mm x 1350mm - per board
THERM WET by Steico40mm STEICO Therm (wet) - 600mm x 1350mm - per board
- Regular price
- £7.33
- Unit Price
- £9.05 per m²
- Sale price
- £7.33
- Unit Price
- £9.05 per m²
- Regular price
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£8.14Save £0.81
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ADAPTAVATE breathAplasta Thermal (Insulating Breathable Plaster) - 9kg bag
THERMAL by AdaptavateADAPTAVATE breathAplasta Thermal (Insulating Breathable Plaster) - 9kg bag
- Regular price
- £19.25
- Unit Price
- £19.25 per m²
- Sale price
- £19.25
- Unit Price
- £19.25 per m²
- Regular price
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£19.25Save £0.00
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150mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m)
TESCON by Pro Clima150mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m)
- Regular price
- £65.75
- Unit Price
- £2.19 per LM (linear metre)
- Sale price
- £65.75
- Unit Price
- £2.19 per LM (linear metre)
- Regular price
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£67.40Save £1.65
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140mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls)
COSYWOOL by Thermafleece140mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls)
- Regular price
- £80.08
- Unit Price
- £15.67 per m²
- Sale price
- £80.08
- Unit Price
- £15.67 per m²
- Regular price
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10mm PROCTOR Spacetherm® A1 Fire Rated Silica Aerogel Blanket - 2400mm x 1200mm (2.88m²)
SPACETHERM® by A. Proctor Group10mm PROCTOR Spacetherm® A1 Fire Rated Silica Aerogel Blanket - 2400mm x 1200mm (2.88m²)
- Regular price
- £239.00
- Unit Price
- £82.99 per m²
- Sale price
- £239.00
- Unit Price
- £82.99 per m²
- Regular price
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40mm STEICOduo Dry - 600mm x 2230mm
DUO DRY by Steico40mm STEICOduo Dry - 600mm x 2230mm
- Regular price
- £17.29
- Unit Price
- £13.64 per m²
- Sale price
- £17.29
- Unit Price
- £13.64 per m²
- Regular price
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£19.21Save £1.92
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SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m
MAJCOAT® 200 by SIGASIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m
- Regular price
- £264.71
- Unit Price
- £3.52 per m²
- Sale price
- £264.71
- Unit Price
- £3.52 per m²
- Regular price
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SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²)
MAJREX® by SIGASIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²)
- Regular price
- £317.42
- Unit Price
- £4.23 per m²
- Sale price
- £317.42
- Unit Price
- £4.23 per m²
- Regular price
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CEWOOD Wood Wool Multi-purpose Board - Square Edge
MULTI-PURPOSE by CewoodCEWOOD Wood Wool Multi-purpose Board - Square Edge
- Regular price
- From £7.54
- Unit Price
- £10.47 per m²
- Sale price
- From £7.54
- Unit Price
- £10.47 per m²
- Regular price
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SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)
MAJPELL® 5 VCL by SIGASIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)
- Regular price
- £194.75
- Unit Price
- £2.59 per m²
- Sale price
- £194.75
- Unit Price
- £2.59 per m²
- Regular price
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140mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls)
COSYWOOL by Thermafleece140mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls)
- Regular price
- £82.08
- Unit Price
- £15.66 per m²
- Sale price
- £82.08
- Unit Price
- £15.66 per m²
- Regular price
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25mm SKANDA Savolit Plus Wood Wool Board - 2400 x 600mm
SAVOLIT PLUS - 2400MM by Skanda Savolit25mm SKANDA Savolit Plus Wood Wool Board - 2400 x 600mm
- Regular price
- £20.75
- Unit Price
- £14.41 per m²
- Sale price
- £20.75
- Unit Price
- £14.41 per m²
- Regular price
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ULTIMATE Value Wood Wool Building Board
BUILDING BOARD by CewoodULTIMATE Value Wood Wool Building Board
- Regular price
- From £6.25
- Unit Price
- £8.68 per m²
- Sale price
- From £6.25
- Unit Price
- £8.68 per m²
- Regular price
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£7.08Save £0.83
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100mm STEICO Special Dry 600mm x 2230mm - per board
SPECIAL DRY by Steico100mm STEICO Special Dry 600mm x 2230mm - per board
- Regular price
- £38.53
- Unit Price
- £30.39 per m²
- Sale price
- £38.53
- Unit Price
- £30.39 per m²
- Regular price
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£42.82Save £4.29
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115mm EJOT ejotherm STR U 2G Masonry Screw in Anchors (Box of 100)
SCREW + WASHER by EJOT115mm EJOT ejotherm STR U 2G Masonry Screw in Anchors (Box of 100)
- Regular price
- £32.55
- Unit Price
- £0.32 per screws
- Sale price
- £32.55
- Unit Price
- £0.32 per screws
- Regular price
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£35.81Save £3.26
