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)

    £14.45
    £1.20 per ea
    £12.04 ex. VAT
    £1.00 per ea
    £14.45
    £1.20 per ea
    £15.90 Save £1.45
    £12.04 ex. VAT
    £1.00 per ea
    £13.25 Save £1.21
  • 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)

    £17.41
    £1.45 per ea
    £14.51 ex. VAT
    £1.21 per ea
    £17.41
    £1.45 per ea
    £19.15 Save £1.74
    £14.51 ex. VAT
    £1.21 per ea
    £15.96 Save £1.45
  • COROTOP Light - Breathable Membrane - 1m x 50m (50m²) COROTOP Light - Breathable Membrane - 1m x 50m (50m²)
    LIGHT by Corotop - Membranes

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

    £36.90
    £0.73 per m²
    £30.75 ex. VAT
    £0.62 per m²
    £36.90
    £0.73 per m²
    Save £-36.90
    £30.75 ex. VAT
    £0.62 per m²
    £0.00 Save £-30.75
  • Insulation Support Netting - 1m x 100m
    Sale 15%
    Winter Deals
    SUPPORT NETTING by Insulation Merchant

    Insulation Support Netting - 1m x 100m

    £20.31
    £0.20 per m²
    £16.93 ex. VAT
    £0.17 per m²
    £20.31
    £0.20 per m²
    £23.90 Save £3.59
    £16.93 ex. VAT
    £0.17 per m²
    £19.92 Save £2.99
  • Insulation Support Netting - 2m x 100m
    Sale 15%
    Winter Deals
    SUPPORT NETTING by Insulation Merchant

    Insulation Support Netting - 2m x 100m

    £40.71
    £0.20 per m²
    £33.93 ex. VAT
    £0.17 per m²
    £40.71
    £0.20 per m²
    £47.90 Save £7.19
    £33.93 ex. VAT
    £0.17 per m²
    £39.92 Save £5.99
  • 100mm Superglass Multi-Roll 44 | Insulation Merchant 100mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    100mm Superglass Multi-Roll 44

    £33.20
    £2.74 per m²
    £27.67 ex. VAT
    £2.28 per m²
    £33.20
    £2.74 per m²
    Save £-33.20
    £27.67 ex. VAT
    £2.28 per m²
    £0.00 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

    £31.70
    £4.11 per m²
    £26.42 ex. VAT
    £3.42 per m²
    £31.70
    £4.11 per m²
    Save £-31.70
    £26.42 ex. VAT
    £3.42 per m²
    £0.00 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

    £30.90
    £5.49 per m²
    £25.75 ex. VAT
    £4.58 per m²
    £30.90
    £5.49 per m²
    Save £-30.90
    £25.75 ex. VAT
    £4.58 per m²
    £0.00 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

    £37.50
    £3.21 per m²
    £31.25 ex. VAT
    £2.67 per m²
    £37.50
    £3.21 per m²
    Save £-37.50
    £31.25 ex. VAT
    £2.67 per m²
    £0.00 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

    £44.90
    £8.41 per m²
    £37.42 ex. VAT
    £7.01 per m²
    £44.90
    £8.41 per m²
    Save £-44.90
    £37.42 ex. VAT
    £7.01 per m²
    £0.00 Save £-37.42
  • 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)

    £42.98
    £7.86 per m²
    £35.82 ex. VAT
    £6.55 per m²
    £42.98
    £7.86 per m²
    Save £-42.98
    £35.82 ex. VAT
    £6.55 per m²
    £0.00 Save £-35.82
  • 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)

    £42.98
    £15.69 per m²
    £35.82 ex. VAT
    £13.07 per m²
    £42.98
    £15.69 per m²
    Save £-42.98
    £35.82 ex. VAT
    £13.07 per m²
    £0.00 Save £-35.82
  • 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)

    £27.90
    £7.86 per m²
    £23.25 ex. VAT
    £6.55 per m²
    £27.90
    £7.86 per m²
    Save £-27.90
    £23.25 ex. VAT
    £6.55 per m²
    £0.00 Save £-23.25
  • 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)

    £27.90
    £15.67 per m²
    £23.25 ex. VAT
    £13.06 per m²
    £27.90
    £15.67 per m²
    Save £-27.90
    £23.25 ex. VAT
    £13.06 per m²
    £0.00 Save £-23.25
  • 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)

    £96.80
    £13.41 per m²
    £80.67 ex. VAT
    £11.17 per m²
    £96.80
    £13.41 per m²
    Save £-96.80
    £80.67 ex. VAT
    £11.17 per m²
    £0.00 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
    COSYWOOL by Thermafleece

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

    £99.35
    £13.41 per m²
    £82.79 ex. VAT
    £11.17 per m²
    £99.35
    £13.41 per m²
    Save £-99.35
    £82.79 ex. VAT
    £11.17 per m²
    £0.00 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
    COSYWOOL by Thermafleece

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

    £95.99
    £20.12 per m²
    £79.99 ex. VAT
    £16.77 per m²
    £95.99
    £20.12 per m²
    Save £-95.99
    £79.99 ex. VAT
    £16.77 per m²
    £0.00 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
    COSYWOOL by Thermafleece

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

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

    £38.82
    £2.79 per m²
    £32.35 ex. VAT
    £2.33 per m²
    £38.82
    £2.79 per m²
    Save £-38.82
    £32.35 ex. VAT
    £2.33 per m²
    £0.00 Save £-32.35