Loft & Underfloor Insulation

Now is the best time to upgrade your loft or underfloor (suspended timber) insulation for the winter months. View our collection of insulation and accessories.
Loft & Underfloor Insulation
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Price: 0 – £379.90
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Showing 28 of 28 products
  • LOFT LEG Loft Flooring Legs - Raise Loft Boards by 175mm (12 per box) LOFT LEG Loft Flooring Legs - Raise Loft Boards by 175mm (12 per box)
    Sale 9%
    LOFT LEG by Loft Leg

    LOFT LEG Loft Flooring Legs - Raise Loft Boards by 175mm (12 per box)

    £12.04
    £1.00 per ea
    £10.03 ex. VAT
    £0.84 per ea
    £12.04
    £1.00 per ea
    £13.25 Save £1.21
    £10.03 ex. VAT
    £0.84 per ea
    £11.04 Save £1.01
  • LOFT LEG XL Loft Flooring Legs - Raise Loft Boards by 300mm (12 per box) LOFT LEG XL Loft Flooring Legs - Raise Loft Boards by 300mm (12 per box)
    Sale 9%
    LOFT LEG by Loft Leg

    LOFT LEG XL Loft Flooring Legs - Raise Loft Boards by 300mm (12 per box)

    £14.51
    £1.20 per ea
    £12.09 ex. VAT
    £1.01 per ea
    £14.51
    £1.20 per ea
    £15.96 Save £1.45
    £12.09 ex. VAT
    £1.01 per ea
    £13.30 Save £1.21
  • COROTOP Light - Breathable Membrane - 1m x 50m (50m²) | Insulation Merchant COROTOP Light - Breathable Membrane - 1m x 50m (50m²) | Insulation Merchant
    LIGHT by Corotop - Membranes

    COROTOP Light - Breathable Membrane - 1m x 50m (50m²)

    £30.75
    £0.61 per m²
    £25.63 ex. VAT
    £0.51 per m²
    £30.75
    £0.61 per m²
    Save £-30.75
    £25.63 ex. VAT
    £0.51 per m²
    £0.00 Save £-25.63
  • Insulation Support Netting - 1m x 100m
    Sale 15%
    Winter Deals
    SUPPORT NETTING by Insulation Merchant

    Insulation Support Netting - 1m x 100m

    £16.93
    £0.16 per m²
    £14.11 ex. VAT
    £0.14 per m²
    £16.93
    £0.16 per m²
    £19.92 Save £2.99
    £14.11 ex. VAT
    £0.14 per m²
    £16.60 Save £2.49
  • Insulation Support Netting - 2m x 100m
    Sale 15%
    Winter Deals
    SUPPORT NETTING by Insulation Merchant

    Insulation Support Netting - 2m x 100m

    £33.93
    £0.16 per m²
    £28.28 ex. VAT
    £0.14 per m²
    £33.93
    £0.16 per m²
    £39.92 Save £5.99
    £28.28 ex. VAT
    £0.14 per m²
    £33.27 Save £4.99
  • 100mm Superglass Multi-Roll 44 | Insulation Merchant 100mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    100mm Superglass Multi-Roll 44

    £27.67
    £2.28 per m²
    £23.06 ex. VAT
    £1.90 per m²
    £27.67
    £2.28 per m²
    Save £-27.67
    £23.06 ex. VAT
    £1.90 per m²
    £0.00 Save £-23.06
  • 150mm Superglass Multi-Roll 44 | Insulation Merchant 150mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    150mm Superglass Multi-Roll 44

    £26.42
    £3.42 per m²
    £22.02 ex. VAT
    £2.85 per m²
    £26.42
    £3.42 per m²
    Save £-26.42
    £22.02 ex. VAT
    £2.85 per m²
    £0.00 Save £-22.02
  • 200mm Superglass Multi-Roll 44 | Insulation Merchant 200mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    200mm Superglass Multi-Roll 44

    £25.75
    £4.58 per m²
    £21.46 ex. VAT
    £3.81 per m²
    £25.75
    £4.58 per m²
    Save £-25.75
    £21.46 ex. VAT
    £3.81 per m²
    £0.00 Save £-21.46
  • 100mm Superglass Multi-Roll 40 | Insulation Merchant 100mm Superglass Multi-Roll 40 | Insulation Merchant
    MULTI-ROLL 40 by Superglass

    100mm Superglass Multi-Roll 40

    £31.25
    £2.67 per m²
    £26.04 ex. VAT
    £2.23 per m²
    £31.25
    £2.67 per m²
    Save £-31.25
    £26.04 ex. VAT
    £2.23 per m²
    £0.00 Save £-26.04
  • 150mm Superglass Multi-Roll 40 | Insulation Merchant 150mm Superglass Multi-Roll 40 | Insulation Merchant
    MULTI-ROLL 40 by Superglass

    150mm Superglass Multi-Roll 40

    £ Looking for a price?

    Add to a quote for our best rate.

  • 200mm Superglass Multi-Roll 40 | Insulation Merchant 200mm Superglass Multi-Roll 40 | Insulation Merchant
    MULTI-ROLL 40 by Superglass

    200mm Superglass Multi-Roll 40

    £37.42
    £7.01 per m²
    £31.18 ex. VAT
    £5.84 per m²
    £37.42
    £7.01 per m²
    Save £-37.42
    £31.18 ex. VAT
    £5.84 per m²
    £0.00 Save £-31.18
  • 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (5.47m²) | Insulation Merchant 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (5.47m²) | Insulation Merchant
    INDITHERM HEMP - 570 by IndiNature®

    50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (5.47m²)

    £35.82
    £6.55 per m²
    £29.85 ex. VAT
    £5.46 per m²
    £35.82
    £6.55 per m²
    Save £-35.82
    £29.85 ex. VAT
    £5.46 per m²
    £0.00 Save £-29.85
  • IndiNature IndiTherm Hemp Flexibatt Insulation | Insulation Merchant IndiNature IndiTherm Hemp Flexibatt Insulation | Insulation Merchant
    INDITHERM HEMP - 570 by IndiNature®

    100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (2.74m²)

    £35.82
    £13.07 per m²
    £29.85 ex. VAT
    £10.89 per m²
    £35.82
    £13.07 per m²
    Save £-35.82
    £29.85 ex. VAT
    £10.89 per m²
    £0.00 Save £-29.85
  • 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (3.55m²) | Insulation Merchant 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (3.55m²) | Insulation Merchant
    INDITHERM HEMP - 370 by IndiNature®

    50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (3.55m²)

    £23.25
    £6.55 per m²
    £19.38 ex. VAT
    £5.46 per m²
    £23.25
    £6.55 per m²
    Save £-23.25
    £19.38 ex. VAT
    £5.46 per m²
    £0.00 Save £-19.38
  • IndiNature IndiTherm Hemp Flexibatt Insulation | Insulation Merchant IndiNature IndiTherm Hemp Flexibatt Insulation | Insulation Merchant
    INDITHERM HEMP - 370 by IndiNature®

    100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (1.78m²)

    £23.25
    £13.06 per m²
    £19.38 ex. VAT
    £10.88 per m²
    £23.25
    £13.06 per m²
    Save £-23.25
    £19.38 ex. VAT
    £10.88 per m²
    £0.00 Save £-19.38
  • 100mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant 100mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchantv
    COSYWOOL by Thermafleece

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

    £80.67
    £11.17 per m²
    £67.23 ex. VAT
    £9.31 per m²
    £80.67
    £11.17 per m²
    Save £-80.67
    £67.23 ex. VAT
    £9.31 per m²
    £0.00 Save £-67.23
  • 100mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant 100mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant
    COSYWOOL by Thermafleece

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

    £82.79
    £11.17 per m²
    £68.99 ex. VAT
    £9.31 per m²
    £82.79
    £11.17 per m²
    Save £-82.79
    £68.99 ex. VAT
    £9.31 per m²
    £0.00 Save £-68.99
  • 150mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant 150mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant
    COSYWOOL by Thermafleece

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

    £79.99
    £16.77 per m²
    £66.66 ex. VAT
    £13.97 per m²
    £79.99
    £16.77 per m²
    Save £-79.99
    £66.66 ex. VAT
    £13.97 per m²
    £0.00 Save £-66.66
  • 150mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant 150mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant
    COSYWOOL by Thermafleece

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

    £82.17
    £16.77 per m²
    £68.48 ex. VAT
    £13.97 per m²
    £82.17
    £16.77 per m²
    Save £-82.17
    £68.48 ex. VAT
    £13.97 per m²
    £0.00 Save £-68.48
  • Knauf Loft Roll 44 | Insulation Merchant Knauf Loft Roll 44 | Insulation Merchant
    Winter Deals
    Free Shipping
    LOFT ROLL by Knauf Insulation

    100mm Knauf Loft Roll 44 (Combi-Cut)

    £32.35
    £2.33 per m²
    £26.96 ex. VAT
    £1.94 per m²
    £32.35
    £2.33 per m²
    Save £-32.35
    £26.96 ex. VAT
    £1.94 per m²
    £0.00 Save £-26.96