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!

Retrofit Insulation | Insulation Merchant
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  • Pro Clima Contega Solido SL100 (Internal Single-sIded Corner Adhesive Tape) - 100mm x 30m | Insulation Merchant Pro Clima Contega Solido SL100 (Internal Single-sIded Corner Adhesive Tape) - 100mm x 30m | Insulation Merchant
    Sale
    CONTEGA SOLIDO SL by Pro Clima

    Pro Clima Contega Solido SL100 (Internal Single-sIded Corner Adhesive Tape) - 100mm x 30m

    £60.40 inc. VAT
    £2.01 per LM (linear metre)
    £50.33 ex. VAT
    £1.68 per LM (linear metre)
    £60.40 inc. VAT
    £2.01 per LM (linear metre)
    £62.04 Save £1.64
    £50.33 ex. VAT
    £1.68 per LM (linear metre)
    £51.70 Save £1.37
  • 25mm SKANDA Savolit Plus Wood Wool Board - 1200 x 600mm | Insulation Merchant 25mm SKANDA Savolit Plus Wood Wool Board - 1200 x 600mm | Insulation Merchant

    5.0

    SAVOLIT PLUS - 1200MM by Skanda Savolit

    25mm SKANDA Savolit Plus Wood Wool Board - 1200 x 600mm

    £12.49 inc. VAT
    £17.35 per m²
    £10.41 ex. VAT
    £14.46 per m²
    £12.49 inc. VAT
    £17.35 per m²
    Save £-12.49
    £10.41 ex. VAT
    £14.46 per m²
    £0.00 Save £-10.41
  • 80m Pro Clima Duplex Double Sided Membrane Tape | Insulation Merchant 80m Pro Clima Duplex Double Sided Membrane Tape | Insulation Merchant
    Sale
    DUPLEX by Pro Clima

    80m Pro Clima Duplex Double Sided Membrane Tape

    £26.30 inc. VAT
    £0.32 per LM (linear metre)
    £21.92 ex. VAT
    £0.27 per LM (linear metre)
    £26.30 inc. VAT
    £0.32 per LM (linear metre)
    £27.00 Save £0.70
    £21.92 ex. VAT
    £0.27 per LM (linear metre)
    £22.50 Save £0.58
  • 20mm STEICO Therm SD (wet) - 600mm x 1350mm - per board | Insulation Merchant 20mm STEICO Therm SD (wet) - 600mm x 1350mm - per board | Insulation Merchant
    Sale 9%
    Spring Savings
    THERM SD WET by Steico

    20mm STEICO Therm SD (wet) - 600mm x 1350mm - per board

    £4.54 inc. VAT
    £5.60 per m²
    £3.78 ex. VAT
    £4.67 per m²
    £4.54 inc. VAT
    £5.60 per m²
    £5.04 Save £0.50
    £3.78 ex. VAT
    £4.67 per m²
    £4.20 Save £0.42
  • 75mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant 75mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant

    5.0

    COSYWOOL by Thermafleece

    75mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls)

    £97.40 inc. VAT
    £10.05 per m²
    £81.17 ex. VAT
    £8.38 per m²
    £97.40 inc. VAT
    £10.05 per m²
    Save £-97.40
    £81.17 ex. VAT
    £8.38 per m²
    £0.00 Save £-81.17
  • 40mm STEICO Therm (wet) - 600mm x 1350mm - per board | Insulation Merchant 40mm STEICO Therm (wet) - 600mm x 1350mm - per board | Insulation Merchant
    Sale 10%
    Spring Savings
    THERM WET by Steico

    40mm STEICO Therm (wet) - 600mm x 1350mm - per board

    £8.79 inc. VAT
    £10.85 per m²
    £7.33 ex. VAT
    £9.04 per m²
    £8.79 inc. VAT
    £10.85 per m²
    £9.77 Save £0.98
    £7.33 ex. VAT
    £9.04 per m²
    £8.14 Save £0.82
  • ADAPTAVATE breathAplasta Thermal (Insulating Breathable Plaster) - 9kg bag | Insulation Merchant

    5.0

    THERMAL by Adaptavate

    ADAPTAVATE breathAplasta Thermal (Insulating Breathable Plaster) - 9kg bag

    £23.10 inc. VAT
    £23.10 per m²
    £19.25 ex. VAT
    £19.25 per m²
    £23.10 inc. VAT
    £23.10 per m²
    £23.10 Save £0.00
    £19.25 ex. VAT
    £19.25 per m²
    £19.25 Save £0.00
  • 140mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant 140mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant

    5.0

    COSYWOOL by Thermafleece

    140mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls)

    £96.10 inc. VAT
    £18.81 per m²
    £80.08 ex. VAT
    £15.67 per m²
    £96.10 inc. VAT
    £18.81 per m²
    Save £-96.10
    £80.08 ex. VAT
    £15.67 per m²
    £0.00 Save £-80.08
  • 150mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m) | Insulation Merchant 150mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m) | Insulation Merchant
    Sale
    TESCON by Pro Clima

    150mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m)

    £78.90 inc. VAT
    £2.63 per LM (linear metre)
    £65.75 ex. VAT
    £2.19 per LM (linear metre)
    £78.90 inc. VAT
    £2.63 per LM (linear metre)
    £80.88 Save £1.98
    £65.75 ex. VAT
    £2.19 per LM (linear metre)
    £67.40 Save £1.65
  • 10mm PROCTOR Spacetherm® A1 Fire Rated Silica Aerogel Blanket - 2400mm x 1200mm (2.88m²) | Insulation Merchant
    SPACETHERM® by A. Proctor Group

    10mm PROCTOR Spacetherm® A1 Fire Rated Silica Aerogel Blanket - 2400mm x 1200mm (2.88m²)

    £286.80 inc. VAT
    £99.58 per m²
    £239.00 ex. VAT
    £82.99 per m²
    £286.80 inc. VAT
    £99.58 per m²
    Save £-286.80
    £239.00 ex. VAT
    £82.99 per m²
    £0.00 Save £-239.00
  • 40mm STEICOduo Dry - 600mm x 2230mm | Insulation Merchant
    Sale 9%
    Spring Savings

    5.0

    DUO DRY by Steico

    40mm STEICOduo Dry - 600mm x 2230mm

    £20.75 inc. VAT
    £16.36 per m²
    £17.29 ex. VAT
    £13.64 per m²
    £20.75 inc. VAT
    £16.36 per m²
    £23.05 Save £2.30
    £17.29 ex. VAT
    £13.64 per m²
    £19.21 Save £1.92
  • SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m | Insulation Merchant SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m | Insulation Merchant
    Spring Savings
    MAJCOAT® 200 by SIGA

    SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m

    £317.65 inc. VAT
    £4.23 per m²
    £264.71 ex. VAT
    £3.53 per m²
    £317.65 inc. VAT
    £4.23 per m²
    Save £-317.65
    £264.71 ex. VAT
    £3.53 per m²
    £0.00 Save £-264.71
  • SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²) | Insulation Merchant SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²) | Insulation Merchant
    Spring Savings
    MAJREX® by SIGA

    SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²)

    £380.90 inc. VAT
    £5.07 per m²
    £317.42 ex. VAT
    £4.23 per m²
    £380.90 inc. VAT
    £5.07 per m²
    Save £-380.90
    £317.42 ex. VAT
    £4.23 per m²
    £0.00 Save £-317.42
  • CEWOOD Wood Wool Multi-purpose Board - Square Edge | Insulation Merchant CEWOOD Wood Wool Multi-purpose Board - Square Edge | Insulation Merchant
    MULTI-PURPOSE by Cewood

    CEWOOD Wood Wool Multi-purpose Board - Square Edge

    From £9.05 inc. VAT
    £12.57 per m²
    From £7.54 ex. VAT
    £10.47 per m²
    From £9.05 inc. VAT
    £12.57 per m²
    Save £-9.05
    From £7.54 ex. VAT
    £10.47 per m²
    £0.00 Save £-7.54
  • SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²) | Insulation Merchant SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²) | Insulation Merchant
    Spring Savings
    MAJPELL® 5 VCL by SIGA

    SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)

    £233.70 inc. VAT
    £3.11 per m²
    £194.75 ex. VAT
    £2.60 per m²
    £233.70 inc. VAT
    £3.11 per m²
    Save £-233.70
    £194.75 ex. VAT
    £2.60 per m²
    £0.00 Save £-194.75
  • 140mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant 140mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant
    COSYWOOL by Thermafleece

    140mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls)

    £98.50 inc. VAT
    £18.80 per m²
    £82.08 ex. VAT
    £15.66 per m²
    £98.50 inc. VAT
    £18.80 per m²
    Save £-98.50
    £82.08 ex. VAT
    £15.66 per m²
    £0.00 Save £-82.08
  • 25mm SKANDA Savolit Plus Wood Wool Board - 2400 x 600mm | Insulation Merchant 25mm SKANDA Savolit Plus Wood Wool Board - 2400 x 600mm | Insulation Merchant
    SAVOLIT PLUS - 2400MM by Skanda Savolit

    25mm SKANDA Savolit Plus Wood Wool Board - 2400 x 600mm

    £24.90 inc. VAT
    £17.29 per m²
    £20.75 ex. VAT
    £14.41 per m²
    £24.90 inc. VAT
    £17.29 per m²
    Save £-24.90
    £20.75 ex. VAT
    £14.41 per m²
    £0.00 Save £-20.75
  • ULTIMATE Value Wood Wool Building Board | Insulation Merchant ULTIMATE Value Wood Wool Building Board | Insulation Merchant
    Sale 11%
    BUILDING BOARD by Cewood

    ULTIMATE Value Wood Wool Building Board

    From £7.50 inc. VAT
    £10.42 per m²
    From £6.25 ex. VAT
    £8.68 per m²
    From £7.50 inc. VAT
    £10.42 per m²
    £8.50 Save £1.00
    From £6.25 ex. VAT
    £8.68 per m²
    £7.08 Save £0.83
  • 100mm STEICO Special Dry 600mm x 2230mm - per board | Insulation Merchant 100mm STEICO Special Dry 600mm x 2230mm - per board | Insulation Merchant
    Sale 10%
    Spring Savings

    5.0

    SPECIAL DRY by Steico

    100mm STEICO Special Dry 600mm x 2230mm - per board

    £46.24 inc. VAT
    £36.47 per m²
    £38.53 ex. VAT
    £30.39 per m²
    £46.24 inc. VAT
    £36.47 per m²
    £51.38 Save £5.14
    £38.53 ex. VAT
    £30.39 per m²
    £42.82 Save £4.28
  • 115mm EJOT ejotherm STR U 2G Masonry Screw in Anchors (Box of 100) | Insulation Merchant
    Sale 9%
    SCREW + WASHER by EJOT

    115mm EJOT ejotherm STR U 2G Masonry Screw in Anchors (Box of 100)

    £39.06 inc. VAT
    £0.39 per screws
    £32.55 ex. VAT
    £0.33 per screws
    £39.06 inc. VAT
    £0.39 per screws
    £42.97 Save £3.91
    £32.55 ex. VAT
    £0.33 per screws
    £35.81 Save £3.26