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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  • LOFT LEG Loft Flooring Legs - Raise Loft Boards by 175mm (12 per box) | Insulation Merchant LOFT LEG Loft Flooring Legs - Raise Loft Boards by 175mm (12 per box) | Insulation Merchant
    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
    £12.04
    £1.00 per ea
    £13.25 Save £1.21
  • LOFT LEG XL Loft Flooring Legs - Raise Loft Boards by 300mm (12 per box) | Insulation Merchant LOFT LEG XL Loft Flooring Legs - Raise Loft Boards by 300mm (12 per box) | Insulation Merchant
    Sale 10%

    4.0

    LOFT LEG by Loft Leg

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

    £14.36
    £1.19 per ea
    £14.36
    £1.19 per ea
    £15.96 Save £1.60
  • COROTOP Light - Breathable Membrane - 1m x 50m (50m²) | Insulation Merchant COROTOP Light - Breathable Membrane - 1m x 50m (50m²) | Insulation Merchant

    5.0

    LIGHT by Corotop - Membranes

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

    £30.75
    £0.61 per m²
    £30.75
    £0.61 per m²
    Save £-30.75
  • Insulation Support Netting - 1m x 100m | Insulation Merchant

    5.0

    SUPPORT NETTING by Insulation Merchant

    Insulation Support Netting - 1m x 100m

    £19.92
    £0.19 per m²
    £19.92
    £0.19 per m²
    Save £-19.92
  • Insulation Support Netting - 2m x 100m | Insulation Merchant
    SUPPORT NETTING by Insulation Merchant

    Insulation Support Netting - 2m x 100m

    £39.92
    £0.19 per m²
    £39.92
    £0.19 per m²
    Save £-39.92
  • 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
    £27.67
    £2.28 per m²
    Save £-27.67
  • 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
    £26.42
    £3.42 per m²
    Save £-26.42
  • 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
    £25.75
    £4.58 per m²
    Save £-25.75
  • 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
    £31.25
    £2.67 per m²
    Save £-31.25
  • 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
    £37.42
    £7.01 per m²
    Save £-37.42
  • 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (5.47m²) 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (5.47m²)
    INDITHERM HEMP - 570 by IndiNature®

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

    £37.61
    £6.88 per m²
    £37.61
    £6.88 per m²
    Save £-37.61
  • 100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (2.74m²) 100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (2.74m²)

    5.0

    INDITHERM HEMP - 570 by IndiNature®

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

    £37.61
    £13.73 per m²
    £37.61
    £13.73 per m²
    Save £-37.61
  • 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (3.55m²) 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (3.55m²)
    INDITHERM HEMP - 370 by IndiNature®

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

    £24.41
    £6.88 per m²
    £24.41
    £6.88 per m²
    Save £-24.41
  • 100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (1.78m²) 100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (1.78m²)

    5.0

    INDITHERM HEMP - 370 by IndiNature®

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

    £24.41
    £13.71 per m²
    £24.41
    £13.71 per m²
    Save £-24.41
  • 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)

    £80.67
    £11.17 per m²
    £80.67
    £11.17 per m²
    Save £-80.67
  • 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)

    £82.79
    £11.17 per m²
    £82.79
    £11.17 per m²
    Save £-82.79
  • 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)

    £79.99
    £16.77 per m²
    £79.99
    £16.77 per m²
    Save £-79.99
  • 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)

    £82.17
    £16.77 per m²
    £82.17
    £16.77 per m²
    Save £-82.17
  • Knauf Loft Roll 44 | Insulation Merchant Knauf Loft Roll 44 | Insulation Merchant
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    5.0

    LOFT ROLL by Knauf Insulation

    100mm Knauf Loft Roll 44 (Combi-Cut)

    £36.85
    £2.65 per m²
    £36.85
    £2.65 per m²
    Save £-36.85