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

Summer Specials

View our summer deals and promotions across our range of products.
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  • Pro Clima Tescon Vana (Airtight Tape)
    TESCON by Pro Clima

    Pro Clima Tescon Vana (Airtight Tape)

    From £30.92 per item
    £1.03 per LM (linear metre)
    inc. VAT
    From £25.77 per item
    £0.86 per LM (linear metre)
    ex. VAT
    Save £-30.92
    From £30.92 per item
    £1.03 per LM (linear metre)
    inc. VAT
    £0.00 Save £-25.77
    From £25.77 per item
    £0.86 per LM (linear metre)
    ex. VAT
  • Pro Clima Contega Solido SL80 (Internal Single-sIded Corner Adhesive Tape) - 80mm x 30m | Insulation Merchant

    5.0

    CONTEGA by Pro Clima

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

    £52.85 per item
    £1.76 per LM (linear metre)
    inc. VAT
    £44.04 per item
    £1.47 per LM (linear metre)
    ex. VAT
    Save £-52.85
    £52.85 per item
    £1.76 per LM (linear metre)
    inc. VAT
    £0.00 Save £-44.04
    £44.04 per item
    £1.47 per LM (linear metre)
    ex. VAT
  • 5mm PROCTOR Spacetherm® A1 Fire Rated Silica Aerogel Blanket - 2400mm x 1200mm (2.88m²) | Insulation Merchant
    Sale 34%
    SPACETHERM® by A. Proctor Group

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

    £65.62 per item
    £97.94 per m²
    inc. VAT
    £54.68 per item
    £81.62 per m²
    ex. VAT
    £99.90 Save £34.28
    £65.62 per item
    £97.94 per m²
    inc. VAT
    £83.25 Save £28.57
    £54.68 per item
    £81.62 per m²
    ex. VAT
  • Pro Clima | Intello Plus | Insulation Merchant

    5.0

    INTELLO by Pro Clima

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

    £125.73 per item
    £4.19 per m²
    inc. VAT
    £104.78 per item
    £3.49 per m²
    ex. VAT
    £0.00 Save £-125.73
    £125.73 per item
    £4.19 per m²
    inc. VAT
    £0.00 Save £-104.78
    £104.78 per item
    £3.49 per m²
    ex. VAT
  • Pro Clima Intello Plus - Vapour Check Membrane | Insulation Merchant

    5.0

    INTELLO by Pro Clima

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

    £301.97 per item
    £4.02 per m²
    inc. VAT
    £251.64 per item
    £3.36 per m²
    ex. VAT
    £0.00 Save £-301.97
    £301.97 per item
    £4.02 per m²
    inc. VAT
    £0.00 Save £-251.64
    £251.64 per item
    £3.36 per m²
    ex. VAT
  • Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²) | Insulation Merchant

    5.0

    SOLITEX by Pro Clima

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

    £297.48 per item
    £3.96 per m²
    inc. VAT
    £247.90 per item
    £3.31 per m²
    ex. VAT
    Save £-297.48
    £297.48 per item
    £3.96 per m²
    inc. VAT
    £0.00 Save £-247.90
    £247.90 per item
    £3.31 per m²
    ex. VAT
  • Pro Clima Solitex Plus (Small Handy Roll) - Vapour Permeable Membrane (1.5m x 15m / 22.5m²) | Insulation Merchant

    5.0

    SOLITEX by Pro Clima

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

    £109.15 per item
    £4.85 per m²
    inc. VAT
    £90.96 per item
    £4.04 per m²
    ex. VAT
    £0.00 Save £-109.15
    £109.15 per item
    £4.85 per m²
    inc. VAT
    £0.00 Save £-90.96
    £90.96 per item
    £4.04 per m²
    ex. VAT
  • 60mm Pro Clima Uni Tape - Airtight Tape (30m) | Insulation Merchant
    UNI TAPE by Pro Clima

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

    £25.08 per item
    £0.83 per LM (linear metre)
    inc. VAT
    £20.90 per item
    £0.70 per LM (linear metre)
    ex. VAT
    Save £-25.08
    £25.08 per item
    £0.83 per LM (linear metre)
    inc. VAT
    £0.00 Save £-20.90
    £20.90 per item
    £0.70 per LM (linear metre)
    ex. VAT
  • ADAPTAVATE breathAplasta Universal (Natural Breathable Plaster) - 20Kg bag | Insulation Merchant

    5.0

    UNIVERSAL by Adaptavate

    ADAPTAVATE breathAplasta Universal (Natural Breathable Plaster) - 18Kg bag

    £23.94 per item
    £4.78 per m²
    inc. VAT
    £19.95 per item
    £3.99 per m²
    ex. VAT
    £23.45 Save £-0.49
    £23.94 per item
    £4.78 per m²
    inc. VAT
    £19.54 Save £-0.41
    £19.95 per item
    £3.99 per m²
    ex. VAT
  • 100mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant

    5.0

    COSYWOOL by Thermafleece

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

    £108.42 per item
    £15.02 per m²
    inc. VAT
    £90.35 per item
    £12.51 per m²
    ex. VAT
    Save £-108.42
    £108.42 per item
    £15.02 per m²
    inc. VAT
    £0.00 Save £-90.35
    £90.35 per item
    £12.51 per m²
    ex. VAT
  • 100mm STEICO Flex 036 - 575mm x 1190mm (4 per pack) | Insulation Merchant

    5.0

    FLEX by Steico

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

    Looking for a price?

    Add to a quote for our best rate.

  • 60mm SIGA Sicrall® 60 - VCL Jointing Airtight Tape (40m) | Insulation Merchant
    SICRALL® by SIGA

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

    £37.40 per item
    £0.93 per LM (linear metre)
    inc. VAT
    £31.17 per item
    £0.78 per LM (linear metre)
    ex. VAT
    Save £-37.40
    £37.40 per item
    £0.93 per LM (linear metre)
    inc. VAT
    £0.00 Save £-31.17
    £31.17 per item
    £0.78 per LM (linear metre)
    ex. VAT
  • 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

    £26.94 per item
    £2.69 per m²
    inc. VAT
    £22.45 per item
    £2.25 per m²
    ex. VAT
    £26.35 Save £-0.59
    £26.94 per item
    £2.69 per m²
    inc. VAT
    £21.96 Save £-0.49
    £22.45 per item
    £2.25 per m²
    ex. VAT
  • 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)

    £111.27 per item
    £15.02 per m²
    inc. VAT
    £92.73 per item
    £12.51 per m²
    ex. VAT
    Save £-111.27
    £111.27 per item
    £15.02 per m²
    inc. VAT
    £0.00 Save £-92.73
    £92.73 per item
    £12.51 per m²
    ex. VAT
  • 50mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant
    COSYWOOL by Thermafleece

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

    £108.58 per item
    £7.52 per m²
    inc. VAT
    £90.48 per item
    £6.27 per m²
    ex. VAT
    Save £-108.58
    £108.58 per item
    £7.52 per m²
    inc. VAT
    £0.00 Save £-90.48
    £90.48 per item
    £6.27 per m²
    ex. VAT
  • 100mm STEICO Flex 036 - 375mm x 1190mm (4 per pack) | Insulation Merchant
    Sale 9%

    4.0

    FLEX by Steico

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

    Looking for a price?

    Add to a quote for our best rate.

  • 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)

    £107.51 per item
    £22.54 per m²
    inc. VAT
    £89.59 per item
    £18.78 per m²
    ex. VAT
    Save £-107.51
    £107.51 per item
    £22.54 per m²
    inc. VAT
    £0.00 Save £-89.59
    £89.59 per item
    £18.78 per m²
    ex. VAT
  • Pro Clima Contega Solido SL100 (Internal Single-sIded Corner Adhesive Tape) - 100mm x 30m | Insulation Merchant
    CONTEGA by Pro Clima

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

    £66.03 per item
    £2.20 per LM (linear metre)
    inc. VAT
    £55.03 per item
    £1.83 per LM (linear metre)
    ex. VAT
    Save £-66.03
    £66.03 per item
    £2.20 per LM (linear metre)
    inc. VAT
    £0.00 Save £-55.03
    £55.03 per item
    £1.83 per LM (linear metre)
    ex. VAT
  • 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)

    £111.50 per item
    £7.52 per m²
    inc. VAT
    £92.92 per item
    £6.27 per m²
    ex. VAT
    Save £-111.50
    £111.50 per item
    £7.52 per m²
    inc. VAT
    £0.00 Save £-92.92
    £92.92 per item
    £6.27 per m²
    ex. VAT
  • 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)

    £110.43 per item
    £22.54 per m²
    inc. VAT
    £92.03 per item
    £18.78 per m²
    ex. VAT
    Save £-110.43
    £110.43 per item
    £22.54 per m²
    inc. VAT
    £0.00 Save £-92.03
    £92.03 per item
    £18.78 per m²
    ex. VAT