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

Spring Savings

Spring into action with a variety of deals and savings this season! Shop the deals now!
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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) | Insulation Merchant
    Sale 9%
    LOFT LEG by Loft Leg

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

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

    £17.23 per item
    £1.43 per ea
    inc. VAT
    £14.36 per item
    £1.20 per ea
    ex. VAT
    £19.15 Save £1.92
    £17.23 per item
    £1.43 per ea
    inc. VAT
    £15.96 Save £1.60
    £14.36 per item
    £1.20 per ea
    ex. VAT
  • COROTOP Light - Breathable Membrane - 1m x 50m (50m²) | Insulation Merchant

    5.0

    LIGHT by Corotop - Membranes

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

    £36.90 per item
    £0.73 per m²
    inc. VAT
    £30.75 per item
    £0.62 per m²
    ex. VAT
    Save £-36.90
    £36.90 per item
    £0.73 per m²
    inc. VAT
    £0.00 Save £-30.75
    £30.75 per item
    £0.62 per m²
    ex. VAT
  • Insulation Support Netting - 1m x 100m | Insulation Merchant
    Sale 5%
    Spring Savings
    Free Shipping

    5.0

    SUPPORT NETTING by Insulation Merchant

    Insulation Support Netting - 1m x 100m

    £28.40 per item
    £0.28 per m²
    inc. VAT
    £23.67 per item
    £0.24 per m²
    ex. VAT
    £29.90 Save £1.50
    £28.40 per item
    £0.28 per m²
    inc. VAT
    £24.92 Save £1.25
    £23.67 per item
    £0.24 per m²
    ex. VAT
  • Insulation Support Netting - 2m x 100m | Insulation Merchant
    Sale 20%
    Top Deals
    SUPPORT NETTING by Insulation Merchant

    Insulation Support Netting - 2m x 100m

    £38.32 per item
    £0.19 per m²
    inc. VAT
    £31.93 per item
    £0.16 per m²
    ex. VAT
    £48.00 Save £9.68
    £38.32 per item
    £0.19 per m²
    inc. VAT
    £40.00 Save £8.07
    £31.93 per item
    £0.16 per m²
    ex. VAT
  • 100mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    100mm Superglass Multi-Roll 44

    £33.20 per item
    £2.74 per m²
    inc. VAT
    £27.67 per item
    £2.28 per m²
    ex. VAT
    Save £-33.20
    £33.20 per item
    £2.74 per m²
    inc. VAT
    £0.00 Save £-27.67
    £27.67 per item
    £2.28 per m²
    ex. VAT
  • 150mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    150mm Superglass Multi-Roll 44

    Looking for a price?

    Add to a quote for our best rate.

  • 200mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    200mm Superglass Multi-Roll 44

    Looking for a price?

    Add to a quote for our best rate.

  • 100mm Superglass Multi-Roll 40 | Insulation Merchant
    MULTI-ROLL 40 by Superglass

    100mm Superglass Multi-Roll 40

    Looking for a price?

    Add to a quote for our best rate.

  • 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
    MULTI-ROLL 40 by Superglass

    200mm Superglass Multi-Roll 40

    Looking for a price?

    Add to a quote for our best rate.

  • 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (5.47m² / 8 per pack)
    INDITHERM HEMP - 570 by IndiNature®

    50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (5.47m² / 8 per pack)

    £53.06 per item
    £9.70 per m²
    inc. VAT
    £44.22 per item
    £8.08 per m²
    ex. VAT
    Save £-53.06
    £53.06 per item
    £9.70 per m²
    inc. VAT
    £0.00 Save £-44.22
    £44.22 per item
    £8.08 per m²
    ex. VAT
  • 100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (2.74m² / 4 per pack)

    5.0

    INDITHERM HEMP - 570 by IndiNature®

    100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (2.74m² / 4 per pack)

    £53.06 per item
    £19.36 per m²
    inc. VAT
    £44.22 per item
    £16.14 per m²
    ex. VAT
    Save £-53.06
    £53.06 per item
    £19.36 per m²
    inc. VAT
    £0.00 Save £-44.22
    £44.22 per item
    £16.14 per m²
    ex. VAT
  • 50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (3.55m² / 8 per pack)
    INDITHERM HEMP - 370 by IndiNature®

    50mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (3.55m² / 8 per pack)

    £34.42 per item
    £9.70 per m²
    inc. VAT
    £28.68 per item
    £8.08 per m²
    ex. VAT
    Save £-34.42
    £34.42 per item
    £9.70 per m²
    inc. VAT
    £0.00 Save £-28.68
    £28.68 per item
    £8.08 per m²
    ex. VAT
  • 100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (1.78m² / 4 per pack)

    5.0

    INDITHERM HEMP - 370 by IndiNature®

    100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 370mm (1.78m² / 4 per pack)

    £34.42 per item
    £19.34 per m²
    inc. VAT
    £28.68 per item
    £16.11 per m²
    ex. VAT
    Save £-34.42
    £34.42 per item
    £19.34 per m²
    inc. VAT
    £0.00 Save £-28.68
    £28.68 per item
    £16.11 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 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
  • 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
  • 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
  • Knauf Loft Roll 44 | Insulation Merchant
    Top Deals
    Free Shipping

    5.0

    LOFT ROLL by Knauf Insulation

    100mm Knauf Loft Roll 44 (Combi-Cut)

    £49.64 per item
    £3.57 per m²
    inc. VAT
    £41.37 per item
    £2.98 per m²
    ex. VAT
    Save £-49.64
    £49.64 per item
    £3.57 per m²
    inc. VAT
    £0.00 Save £-41.37
    £41.37 per item
    £2.98 per m²
    ex. VAT