Underfloor Insulation System

  • Step 1.

    Breather membrane

    A Breather Membrane is designed to be fitted to the external (cold) side of the floor build-up. The Breathable Membrane is waterproof against wind and rain but also vapour-permeable which allows the passage of water vapour or moisture through the membrane. The benefit to this is when installed in a

    Shop all
  • Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²) | Insulation Merchant

    5.0

    SOLITEX by Pro Clima

    Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²)

    SOLITEX PLUS is the Next Generation of high-performance vapour permeable underlay. With an impressive range of charac...
    £247.90 per item
    £3.30 per m²
    Save £-247.90
    £247.90 per item
    £3.30 per m²
  • SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²) | Insulation Merchant
    MAJCOAT® by SIGA

    SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²)

    The diffusion-open layer can withstand driving rain and is suitable as a breathable membrane for external protection ...
    £184.08 per item
    £2.45 per m²
    Save £-184.08
    £184.08 per item
    £2.45 per m²
  • COROTOP Light - Breathable Membrane - 1m x 50m (50m²) | Insulation Merchant

    5.0

    LIGHT by Corotop - Membranes

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

    Corotop Light is a lightweight breather membrane great for us on underfloor insulation renovations. Also for use as a...
    £30.75 per item
    £0.61 per m²
    Save £-30.75
    £30.75 per item
    £0.61 per m²
  • Step 2.

    Insulation

    Some description

    Shop all
  • 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)

    A flexible thermal insulation ‘batt’ made from UK crops. IndiTherm® can be friction fit between structural framing or...
    £44.22 per item
    £16.14 per m²
    Save £-44.22
    £44.22 per item
    £16.14 per m²
  • 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)

    Thermafleece CosyWool Roll is a versatile insulation rich in British sheep’s wool and is the ideal choice if you are ...
    £92.73 per item
    £12.51 per m²
    Save £-92.73
    £92.73 per item
    £12.51 per m²
  • Knauf Loft Roll 44 | Insulation Merchant
    Top Deals
    Free Shipping

    5.0

    LOFT ROLL by Knauf Insulation

    100mm Knauf Loft Roll 44 (Combi-Cut)

    Knauf Loft Roll 44 is available in a range of thicknesses with a thermal conductivity of 0.044 W/mK. Combi-cut produc...
    £41.37 per item
    £2.98 per m²
    Save £-41.37
    £41.37 per item
    £2.98 per m²
  • 100mm Sisaltech SISALWOOL™ 100 (1200x570mm) - Pack of 6 (4.104m²) | Insulation Merchant
    Sale
    SISALWOOL 100 by Sisalwool

    Sisaltech SISALWOOL™ 100

    Sisaltech Sisalwool 100 is a high-performance low carbon natural fibre insulation which comes in batts. It is vapour ...
    From £62.25 per item
    £23.94 per m²
    £63.79 Save £1.54
    From £62.25 per item
    £23.94 per m²
  • Step 3.

    Vapour Control Membrane

    VCLs are fitted on the warm-side of a build-up and manage the movement of humid air into the insulation. When a property is heated and lived in, moisture is created from breathing, washing and general living. This can produce moisture and when this comes into contact with a cold surface, it condens

    Shop all
  • Pro Clima DA - Membrane (1.5m x 50m / 75m²) | Insulation Merchant

    5.0

    DA by Pro Clima

    Pro Clima DA - Membrane (1.5m x 50m / 75m²)

    Pro Clima DA vapour check and the airtight membrane are designed and suited for use above rafters on sarking boards b...
    £170.77 per item
    £2.27 per m²
    Save £-170.77
    £170.77 per item
    £2.27 per m²
  • SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²) | Insulation Merchant
    MAJPELL® by SIGA

    SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)

    SIGA Majpell® 5 is a diffusible breathable vapour control layer suitable for establishing an airtight layer with conv...
    £194.75 per item
    £2.59 per m²
    Save £-194.75
    £194.75 per item
    £2.59 per m²
Suspended Timber Floor

System by Pro Clima

Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²) | Insulation Merchant

PC/SP1

Pro Clima

Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²)

£247.90 per item
£3.30 per m²
Save £-247.90
£247.90 per item
£3.30 per m²
100mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant

TF/COSY-100x570

Thermafleece

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

£92.73 per item
£12.51 per m²
Save £-92.73
£92.73 per item
£12.51 per m²
Pro Clima DA - Membrane (1.5m x 50m / 75m²) | Insulation Merchant

PC/DA

Pro Clima

Pro Clima DA - Membrane (1.5m x 50m / 75m²)

£170.77 per item
£2.27 per m²
Save £-170.77
£170.77 per item
£2.27 per m²
18mm P5 Chipboard Flooring (2400mm x 600mm) | Insulation Merchant

UIS/P5CBF-18

Insulation Merchant

18mm P5 Chipboard Flooring (2400mm x 600mm)

£13.25 per item
£9.20 per m²
Save £-13.25
£13.25 per item
£9.20 per m²
Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²) | Insulation Merchant

PC/SP1

Pro Clima

Pro Clima Solitex Plus - Vapour Permeable Membrane (1.5m x 50m / 75m²)

£247.90 per item
£3.30 per m²
Save £-247.90
£247.90 per item
£3.30 per m²
100mm Thermafleece CosyWool Sheep Wool (2 x 570mm rolls) | Insulation Merchant

TF/COSY-100x570

Thermafleece

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

£92.73 per item
£12.51 per m²
Save £-92.73
£92.73 per item
£12.51 per m²
Pro Clima DA - Membrane (1.5m x 50m / 75m²) | Insulation Merchant

PC/DA

Pro Clima

Pro Clima DA - Membrane (1.5m x 50m / 75m²)

£170.77 per item
£2.27 per m²
Save £-170.77
£170.77 per item
£2.27 per m²
18mm P5 Chipboard Flooring (2400mm x 600mm) | Insulation Merchant

UIS/P5CBF-18

Insulation Merchant

18mm P5 Chipboard Flooring (2400mm x 600mm)

£13.25 per item
£9.20 per m²
Save £-13.25
£13.25 per item
£9.20 per m²

System by SIGA

SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²) | Insulation Merchant

SIG/MC150-15

SIGA

SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²)

£184.08 per item
£2.45 per m²
Save £-184.08
£184.08 per item
£2.45 per m²
100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (2.74m² / 4 per pack)

IN/TH4057-100

IndiNature

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

£44.22 per item
£16.14 per m²
Save £-44.22
£44.22 per item
£16.14 per m²
SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²) | Insulation Merchant

SIG/MP5-15

SIGA

SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)

£194.75 per item
£2.59 per m²
Save £-194.75
£194.75 per item
£2.59 per m²
18mm P5 Chipboard Flooring (2400mm x 600mm) | Insulation Merchant

UIS/P5CBF-18

Insulation Merchant

18mm P5 Chipboard Flooring (2400mm x 600mm)

£13.25 per item
£9.20 per m²
Save £-13.25
£13.25 per item
£9.20 per m²
SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²) | Insulation Merchant

SIG/MC150-15

SIGA

SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²)

£184.08 per item
£2.45 per m²
Save £-184.08
£184.08 per item
£2.45 per m²
100mm IndiNature IndiTherm Hemp Flexibatt Insulation - 1200 x 570mm (2.74m² / 4 per pack)

IN/TH4057-100

IndiNature

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

£44.22 per item
£16.14 per m²
Save £-44.22
£44.22 per item
£16.14 per m²
SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²) | Insulation Merchant

SIG/MP5-15

SIGA

SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)

£194.75 per item
£2.59 per m²
Save £-194.75
£194.75 per item
£2.59 per m²
18mm P5 Chipboard Flooring (2400mm x 600mm) | Insulation Merchant

UIS/P5CBF-18

Insulation Merchant

18mm P5 Chipboard Flooring (2400mm x 600mm)

£13.25 per item
£9.20 per m²
Save £-13.25
£13.25 per item
£9.20 per m²