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
Clear all filters

Showing 118 of 118 products

Sort by:
Price: 0 – £1,905.11

Filter and sort

Showing 118 of 118 products

Clear
Clear
Clear
Clear
Clear
Clear

Up to £1,905.11

Clear
Clear all filters
Clear all filters
Showing 118 of 118 products
  • Airtight and windtight systems | Insulation Merchant 60mm Pro Clima Tescon Vana - Airtight Tape (30m) | Insulation Merchant
    Sale 5%
    Spring Savings

    5.0

    TESCON by Pro Clima

    60mm Pro Clima Tescon Vana - Airtight Tape (30m)

    £29.27 inc. VAT
    £0.97 per LM (linear metre)
    £24.39 ex. VAT
    £0.81 per LM (linear metre)
    £29.27 inc. VAT
    £0.97 per LM (linear metre)
    £30.84 Save £1.57
    £24.39 ex. VAT
    £0.81 per LM (linear metre)
    £25.70 Save £1.31
  • Pro Clima Contega Solido SL80 (Internal Single-sIded Corner Adhesive Tape) - 80mm x 30m | Insulation Merchant Pro Clima Contega Solido SL80 (Internal Single-sIded Corner Adhesive Tape) - 80mm x 30m | Insulation Merchant
    Sale

    5.0

    CONTEGA SOLIDO SL by Pro Clima

    Pro Clima Contega Solido SL80 (Internal Single-sIded Corner Adhesive Tape) - 80mm x 30m

    £48.30 inc. VAT
    £1.61 per LM (linear metre)
    £40.25 ex. VAT
    £1.34 per LM (linear metre)
    £48.30 inc. VAT
    £1.61 per LM (linear metre)
    £49.56 Save £1.26
    £40.25 ex. VAT
    £1.34 per LM (linear metre)
    £41.30 Save £1.05
  • 10mm PROCTOR Spacetherm® Silica Aerogel STRIPS - 2400mm x 280mm (0.67m²) | Insulation Merchant 10mm PROCTOR Spacetherm® Silica Aerogel STRIPS - 2400mm x 280mm (0.67m²) | Insulation Merchant
    Sale 32%
    Spring Savings
    Free Shipping
    SPACETHERM® by A. Proctor Group

    10mm PROCTOR Spacetherm® A1 Fire Rated Silica Aerogel (STRIPS) - 2400mm x 280mm (0.67m²)

    £46.90 inc. VAT
    £70.00 per m²
    £39.08 ex. VAT
    £58.33 per m²
    £46.90 inc. VAT
    £70.00 per m²
    £69.90 Save £23.00
    £39.08 ex. VAT
    £58.33 per m²
    £58.25 Save £19.17
  • Pro Clima Intello Plus - Vapour Check Membrane | Insulation Merchant Pro Clima Intello Plus - Vapour Check Membrane | Tescon Vana | Insulation Merchant
    Sale 10%

    5.0

    INTELLO PLUS by Pro Clima

    1.5m Pro Clima Intello Plus - Vapour Check Membrane (50m)

    £268.20 inc. VAT
    £3.57 per m²
    £223.50 ex. VAT
    £2.98 per m²
    £268.20 inc. VAT
    £3.57 per m²
    £299.16 Save £30.96
    £223.50 ex. VAT
    £2.98 per m²
    £249.30 Save £25.80
  • Pro Clima | Intello Plus | Insulation Merchant Pro Clima | Intello Plus | Teson Vana | Insulation Merchant
    Sale 10%

    5.0

    INTELLO PLUS by Pro Clima

    1.5m Pro Clima Intello Plus (Small Handy Rolls) - Vapour Check Membrane (20m)

    £111.50 inc. VAT
    £3.71 per m²
    £92.92 ex. VAT
    £3.10 per m²
    £111.50 inc. VAT
    £3.71 per m²
    £124.44 Save £12.94
    £92.92 ex. VAT
    £3.10 per m²
    £103.70 Save £10.78
  • Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²) | Insulation Merchant Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²) | Insulation Merchant
    Sale 10%

    5.0

    SOLITEX PLUS by Pro Clima

    Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²)

    £265.20 inc. VAT
    £3.53 per m²
    £221.00 ex. VAT
    £2.95 per m²
    £265.20 inc. VAT
    £3.53 per m²
    £295.80 Save £30.60
    £221.00 ex. VAT
    £2.95 per m²
    £246.50 Save £25.50
  • ADAPTAVATE breathAplasta Universal (Natural Breathable Plaster) - 20Kg bag | Insulation Merchant ADAPTAVATE breathAplasta Universal (Natural Breathable Plaster) - 20Kg bag | Insulation Merchant

    5.0

    UNIVERSAL by Adaptavate

    ADAPTAVATE breathAplasta Universal (Natural Breathable Plaster) - 20Kg bag

    £23.45 inc. VAT
    £4.69 per m²
    £19.54 ex. VAT
    £3.91 per m²
    £23.45 inc. VAT
    £4.69 per m²
    £23.45 Save £0.00
    £19.54 ex. VAT
    £3.91 per m²
    £19.54 Save £0.00
  • Pro Clima Solitex Plus (Small Handy Roll) - Vapour Permeable Membrane (1.5m x 15m / 22.5m²) | Insulation Merchant Pro Clima Solitex Plus (Small Handy Roll) - Vapour Permeable Membrane (1.5m x 15m / 22.5m²) | Insulation Merchant
    Sale 10%

    5.0

    SOLITEX PLUS by Pro Clima

    Pro Clima Solitex Plus (Small Handy Roll) - Vapour Permeable Membrane (1.5m x 15m / 22.5m²)

    £97.20 inc. VAT
    £4.32 per m²
    £81.00 ex. VAT
    £3.60 per m²
    £97.20 inc. VAT
    £4.32 per m²
    £108.48 Save £11.28
    £81.00 ex. VAT
    £3.60 per m²
    £90.40 Save £9.40
  • 100mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant 100mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchantv

    5.0

    COSYWOOL by Thermafleece

    100mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls)

    £96.80 inc. VAT
    £13.41 per m²
    £80.67 ex. VAT
    £11.17 per m²
    £96.80 inc. VAT
    £13.41 per m²
    Save £-96.80
    £80.67 ex. VAT
    £11.17 per m²
    £0.00 Save £-80.67
  • 60mm Pro Clima Uni Tape - Airtight Tape (30m) | Insulation Merchant 60mm Pro Clima Uni Tape - Airtight Tape (30m) | Insulation Merchant
    Sale 7%
    UNI TAPE by Pro Clima

    60mm Pro Clima Uni Tape - Airtight Tape (30m)

    £21.96 inc. VAT
    £0.73 per LM (linear metre)
    £18.30 ex. VAT
    £0.61 per LM (linear metre)
    £21.96 inc. VAT
    £0.73 per LM (linear metre)
    £23.64 Save £1.68
    £18.30 ex. VAT
    £0.61 per LM (linear metre)
    £19.70 Save £1.40
  • 100mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m) | Insulation Merchant 100mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m) | Insulation Merchant
    Sale 11%
    Spring Savings

    5.0

    TESCON by Pro Clima

    100mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m)

    £47.87 inc. VAT
    £1.59 per LM (linear metre)
    £39.89 ex. VAT
    £1.33 per LM (linear metre)
    £47.87 inc. VAT
    £1.59 per LM (linear metre)
    £54.36 Save £6.49
    £39.89 ex. VAT
    £1.33 per LM (linear metre)
    £45.30 Save £5.41
  • ADAPTAVATE breathAplasta Smooth (Natural Breathable Smooth Fine Finishing Plaster) - 20kg bag | Insulation Merchant
    SMOOTH by Adaptavate

    ADAPTAVATE breathAplasta Smooth (Natural Breathable Smooth Fine Finishing Plaster) - 20kg bag

    £26.35 inc. VAT
    £2.63 per m²
    £21.96 ex. VAT
    £2.20 per m²
    £26.35 inc. VAT
    £2.63 per m²
    £26.35 Save £0.00
    £21.96 ex. VAT
    £2.20 per m²
    £21.96 Save £0.00
  • 100mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant 100mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant

    5.0

    COSYWOOL by Thermafleece

    100mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls)

    £99.35 inc. VAT
    £13.41 per m²
    £82.79 ex. VAT
    £11.17 per m²
    £99.35 inc. VAT
    £13.41 per m²
    Save £-99.35
    £82.79 ex. VAT
    £11.17 per m²
    £0.00 Save £-82.79
  • 100mm STEICO Flex 036 - 575mm x 1190mm (4 per pack) | Insulation Merchant 100mm STEICO Flex 036 - 575mm x 1190mm (4 per pack) | Insulation Merchant
    Sale 9%
    Spring Savings

    5.0

    FLEX by Steico

    100mm STEICO Flex 036 - 575mm x 1190mm (4 per pack)

    £42.97 inc. VAT
    £15.70 per m²
    £35.81 ex. VAT
    £13.08 per m²
    £42.97 inc. VAT
    £15.70 per m²
    £47.74 Save £4.77
    £35.81 ex. VAT
    £13.08 per m²
    £39.78 Save £3.98
  • 60mm SIGA Sicrall® 60 - VCL Jointing Airtight Tape (40m) | Insulation Merchant 60mm SIGA Sicrall® 60 - VCL Jointing Airtight Tape (40m) | Insulation Merchant
    Spring Savings
    SICRALL® 60 by SIGA

    60mm SIGA Sicrall® 60 - VCL Jointing Airtight Tape (40m)

    £37.40 inc. VAT
    £0.93 per LM (linear metre)
    £31.17 ex. VAT
    £0.78 per LM (linear metre)
    £37.40 inc. VAT
    £0.93 per LM (linear metre)
    Save £-37.40
    £31.17 ex. VAT
    £0.78 per LM (linear metre)
    £0.00 Save £-31.17
  • 50mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant 50mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant
    COSYWOOL by Thermafleece

    50mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls)

    £96.95 inc. VAT
    £6.72 per m²
    £80.79 ex. VAT
    £5.60 per m²
    £96.95 inc. VAT
    £6.72 per m²
    Save £-96.95
    £80.79 ex. VAT
    £5.60 per m²
    £0.00 Save £-80.79
  • 150mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant 150mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant

    4.6

    COSYWOOL by Thermafleece

    150mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls)

    £95.99 inc. VAT
    £20.12 per m²
    £79.99 ex. VAT
    £16.77 per m²
    £95.99 inc. VAT
    £20.12 per m²
    Save £-95.99
    £79.99 ex. VAT
    £16.77 per m²
    £0.00 Save £-79.99
  • 100mm STEICO Flex 036 - 375mm x 1190mm (4 per pack) | Insulation Merchant 100mm STEICO Flex 036 - 375mm x 1190mm (4 per pack) | Insulation Merchant
    Sale 9%
    Spring Savings

    4.0

    FLEX by Steico

    100mm STEICO Flex 036 - 375mm x 1190mm (4 per pack)

    £28.88 inc. VAT
    £16.18 per m²
    £24.07 ex. VAT
    £13.48 per m²
    £28.88 inc. VAT
    £16.18 per m²
    £31.78 Save £2.90
    £24.07 ex. VAT
    £13.48 per m²
    £26.48 Save £2.42
  • 50mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant 50mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant

    5.0

    COSYWOOL by Thermafleece

    50mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls)

    £99.55 inc. VAT
    £6.72 per m²
    £82.96 ex. VAT
    £5.60 per m²
    £99.55 inc. VAT
    £6.72 per m²
    Save £-99.55
    £82.96 ex. VAT
    £5.60 per m²
    £0.00 Save £-82.96
  • 150mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant 150mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant

    5.0

    COSYWOOL by Thermafleece

    150mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls)

    £98.60 inc. VAT
    £20.12 per m²
    £82.17 ex. VAT
    £16.77 per m²
    £98.60 inc. VAT
    £20.12 per m²
    Save £-98.60
    £82.17 ex. VAT
    £16.77 per m²
    £0.00 Save £-82.17