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

    LL/LFL

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

    €14,95 EUR ex. GB VAT
    €1,24 per ea
    €1,04 per ea
    €14,95 EUR ex. GB VAT
    €1,24 per ea
    you save €-14,95
    €1,04 per ea
    €0,00 you save €-12,46
  • 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)
    Summer Specials
    LOFT LEG by Loft Leg

    LL/LFLXL

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

    €17,95 EUR ex. GB VAT
    €1,49 per ea
    €1,25 per ea
    €17,95 EUR ex. GB VAT
    €1,49 per ea
    you save €-17,95
    €1,25 per ea
    €0,00 you save €-14,96
  • COROTOP Light - Breathable Membrane - 1m x 50m (50m²) COROTOP Light - Breathable Membrane - 1m x 50m (50m²)
    LIGHT by Corotop - Membranes

    FAK/CORLI

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

    €37,95 EUR ex. GB VAT
    €0,75 per m²
    €0,63 per m²
    €37,95 EUR ex. GB VAT
    €0,75 per m²
    you save €-37,95
    €0,63 per m²
    €0,00 you save €-31,63
  • Insulation Support Netting - 1m x 100m
    SUPPORT NETTING by Insulation Merchant

    UIS/MESHNET-1001

    Insulation Support Netting - 1m x 100m

    €24,95 EUR ex. GB VAT
    €0,24 per m²
    €0,21 per m²
    €24,95 EUR ex. GB VAT
    €0,24 per m²
    you save €-24,95
    €0,21 per m²
    €0,00 you save €-20,79
  • Insulation Support Netting - 2m x 100m
    SUPPORT NETTING by Insulation Merchant

    UIS/MESHNET-1002

    Insulation Support Netting - 2m x 100m

    €49,95 EUR ex. GB VAT
    €0,24 per m²
    €0,21 per m²
    €49,95 EUR ex. GB VAT
    €0,24 per m²
    you save €-49,95
    €0,21 per m²
    €0,00 you save €-41,63
  • 100mm Superglass Multi-Roll 44 | Insulation Merchant 100mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    SG/MR44-100

    100mm Superglass Multi-Roll 44

    €33,95 EUR ex. GB VAT
    €2,80 per m²
    €2,33 per m²
    €33,95 EUR ex. GB VAT
    €2,80 per m²
    you save €-33,95
    €2,33 per m²
    €0,00 you save €-28,29
  • 150mm Superglass Multi-Roll 44 | Insulation Merchant 150mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    SG/MR44-150

    150mm Superglass Multi-Roll 44

    €32,95 EUR ex. GB VAT
    €4,27 per m²
    €3,56 per m²
    €32,95 EUR ex. GB VAT
    €4,27 per m²
    you save €-32,95
    €3,56 per m²
    €0,00 you save €-27,46
  • 200mm Superglass Multi-Roll 44 | Insulation Merchant 200mm Superglass Multi-Roll 44 | Insulation Merchant
    MULTI-ROLL 44 by Superglass

    SG/MR44-200

    200mm Superglass Multi-Roll 44

    €31,95 EUR ex. GB VAT
    €5,68 per m²
    €4,73 per m²
    €31,95 EUR ex. GB VAT
    €5,68 per m²
    you save €-31,95
    €4,73 per m²
    €0,00 you save €-26,63
  • 100mm Superglass Multi-Roll 40 | Insulation Merchant 100mm Superglass Multi-Roll 40 | Insulation Merchant
    MULTI-ROLL 40 by Superglass

    SG/MR40-100

    100mm Superglass Multi-Roll 40

    €38,95 EUR ex. GB VAT
    €3,33 per m²
    €2,77 per m²
    €38,95 EUR ex. GB VAT
    €3,33 per m²
    you save €-38,95
    €2,77 per m²
    €0,00 you save €-32,46
  • 150mm Superglass Multi-Roll 40 | Insulation Merchant 150mm Superglass Multi-Roll 40 | Insulation Merchant
    MULTI-ROLL 40 by Superglass

    SG/MR40-150

    150mm Superglass Multi-Roll 40

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    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

    SG/MR40-200

    200mm Superglass Multi-Roll 40

    €45,95 EUR ex. GB VAT
    €8,61 per m²
    €7,18 per m²
    €45,95 EUR ex. GB VAT
    €8,61 per m²
    you save €-45,95
    €7,18 per m²
    €0,00 you save €-38,29
  • 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
    Autumn Offers
    INDITHERM HEMP - 570 by IndiNature®

    IN/TH4057-50

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

    €43,95 EUR ex. GB VAT
    €8,03 per m²
    €6,70 per m²
    €43,95 EUR ex. GB VAT
    €8,03 per m²
    you save €-43,95
    €6,70 per m²
    €0,00 you save €-36,63
  • IndiNature IndiTherm Hemp Flexibatt Insulation | Insulation Merchant IndiNature IndiTherm Hemp Flexibatt Insulation | Insulation Merchant
    Autumn Offers
    INDITHERM HEMP - 570 by IndiNature®

    IN/TH4057-100

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

    €43,95 EUR ex. GB VAT
    €16,04 per m²
    €13,37 per m²
    €43,95 EUR ex. GB VAT
    €16,04 per m²
    you save €-43,95
    €13,37 per m²
    €0,00 you save €-36,63
  • 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
    Autumn Offers
    INDITHERM HEMP - 370 by IndiNature®

    IN/TH4037-50

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

    €28,95 EUR ex. GB VAT
    €8,15 per m²
    €6,80 per m²
    €28,95 EUR ex. GB VAT
    €8,15 per m²
    you save €-28,95
    €6,80 per m²
    €0,00 you save €-24,13
  • IndiNature IndiTherm Hemp Flexibatt Insulation | Insulation Merchant IndiNature IndiTherm Hemp Flexibatt Insulation | Insulation Merchant
    Autumn Offers
    INDITHERM HEMP - 370 by IndiNature®

    IN/TH4037-100

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

    €28,95 EUR ex. GB VAT
    €16,26 per m²
    €13,55 per m²
    €28,95 EUR ex. GB VAT
    €16,26 per m²
    you save €-28,95
    €13,55 per m²
    €0,00 you save €-24,13
  • 100mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant 100mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchantv
    Autumn Offers
    COSYWOOL by Thermafleece

    TF/COSY-100x370

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

    €99,95 EUR ex. GB VAT
    €13,84 per m²
    €11,54 per m²
    €99,95 EUR ex. GB VAT
    €13,84 per m²
    you save €-99,95
    €11,54 per m²
    €0,00 you save €-83,29
  • 100mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant 100mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant
    Autumn Offers
    COSYWOOL by Thermafleece

    TF/COSY-100x570

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

    €101,95 EUR ex. GB VAT
    €13,76 per m²
    €11,47 per m²
    €101,95 EUR ex. GB VAT
    €13,76 per m²
    you save €-101,95
    €11,47 per m²
    €0,00 you save €-84,96
  • 150mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant 150mm Thermafleece CosyWool Sheep Wool (3 x 370mm rolls) | Insulation Merchant
    Autumn Offers
    COSYWOOL by Thermafleece

    TF/COSY-150x370

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

    €98,95 EUR ex. GB VAT
    €20,74 per m²
    €17,29 per m²
    €98,95 EUR ex. GB VAT
    €20,74 per m²
    you save €-98,95
    €17,29 per m²
    €0,00 you save €-82,46
  • 150mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant 150mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant
    Autumn Offers
    COSYWOOL by Thermafleece

    TF/COSY-150x570

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

    €100,95 EUR ex. GB VAT
    €20,60 per m²
    €17,17 per m²
    €100,95 EUR ex. GB VAT
    €20,60 per m²
    you save €-100,95
    €17,17 per m²
    €0,00 you save €-84,13
  • Knauf Loft Roll 44 | Insulation Merchant Knauf Loft Roll 44 | Insulation Merchant
    Black Friday
    Black Friday Daily Deal
    Free Shipping
    LOFT ROLL by Knauf Insulation

    KNI/LOFT44-100

    100mm Knauf Loft Roll 44 (Combi-Cut)

    €39,95 EUR ex. GB VAT
    €2,88 per m²
    €2,40 per m²
    €39,95 EUR ex. GB VAT
    €2,88 per m²
    you save €-39,95
    €2,40 per m²
    €0,00 you save €-33,29