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Underfloor & Underground

Underfloor & Underground

Underfloor & Underground - Competitive Trade Pricing with quantity discounts. Online supplier of Swimming Pool and Basement insulation.

About

Underfloor insulation is a type of insulation that is installed under the floorboards. It will reduce the amount of heat that escapes through the floor, which means you will need less heating to keep your home warm. This means you can save on your energy bills as well as reducing your carbon footprint.

Have a browse of our stock and filter by thickness or coverage on the left-hand side of the page. If you’d like to talk through the suitability of some products for your project, or get a quantity discount quotation please call us on 02039519012 , email sales@insulationstoreonline.co.uk or Live Chat - Lowest UK Prices.

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14 products
newest
40mm Kay-Metzeler EPS70 Polystyrene Insulation Board (Pack of 9) - image
40mm Kay-Metzeler EPS70 Polystyrene Insulation Board (Pack of 9)
EPS insulation board Pack Length: 21600mmPack Width: 10800mmPack coverage: 25.92m2Thickness: 40mmQuantity: Pack Of 9
Last known price: £87.63
£ 105.16 Inc VAT
40mm White Polystyrene EPS for External Wall Insulation ( Pack of 15 )
Expanded Polystyrene (EPS) board Pack Length: 15000mmPack Width: 75000mmPack coverage: 7.5m2Thickness: 40mmQuantity: Pack Of 15Grade: 75kPa
Last known price: £32.11
£ 38.53 Inc VAT
40mm Grey Polystyrene EPS for External Wall Insulation ( Pack of 15 )
Expanded Polystyrene (EPS) board Pack Length: 15000mmPack Width: 7500mmPack coverage: 7.5m2Thickness: 40mmQuantity: Pack Of 15Grade: 70 (kPa)
Last known price: £35.29
£ 42.35 Inc VAT
40mm Rockwool RW3 Acoustic Insulation Slab ( Pack of 10 )
stone wool insulation slab Pack Length: 12000mmPack Width: 6000mmPack coverage: 7.20m2Thickness: 40mmQuantity: Pack Of 10
Last known price: £46.55
£ 55.86 Inc VAT
40mm Knauf Insulation Rocksilk RS140 Building Slab ( Pack of 5 )
Rock Mineral Wool Slabs Pack Length: 6000mmPack Width: 3000mmPack coverage: 3.60m2Thickness: 40mmQuantity: Pack Of 5
£ 43.41
£ 52.09 Inc VAT
40mm Knauf Insulation Rocksilk RS100 Building Slab ( Pack of 7 )
Rock Mineral Wool Slabs Pack Length: 8400mmPack Width: 4200mmPack coverage: 5.04m2Thickness: 40mmQuantity: Pack Of 7
£ 43.41
£ 52.09 Inc VAT
40mm Knauf Insulation Rocksilk RS60 Building Slab ( Pack of 12 )
Rock Mineral Wool Slabs Pack Length: 14400mmPack Width: 7200mmPack coverage: 8.64m2Thickness: 40mmQuantity: Pack Of 12
£ 43.41
£ 52.09 Inc VAT
40mm Knauf Insulation Rocksilk RS45 Building Slab ( Pack of 12 )
Rock Mineral Wool Slabs Pack Length: 14400mmPack Width: 7200mmPack coverage: 8.64m2Thickness: 40mmQuantity: Pack Of 12
£ 43.41
£ 52.09 Inc VAT
40mm BEWI EPS150 Jabfloor Floor Polystyrene Insulation ( Pack of 15 )
Jablite expanded polystyrene EPS insulation Pack Length: 36000mmPack Width: 18000mmPack coverage: 43.20m2Thickness: 40mmQuantity: Pack Of 15
£ 162.84
£ 195.41 Inc VAT
40mm BEWI EPS100 Jabfloor Floor Polystyrene Insulation ( Pack of 15 )
Jablite expanded polystyrene EPS insulation Pack Length: 36000mmPack Width: 18000mmPack coverage: 43.20m2Thickness: 40mmQuantity: Pack Of 15Grade: 100 (kPa)
£ 162.84
£ 195.41 Inc VAT
40mm BEWI EPS70 Jabfloor Floor Polystyrene Insulation ( Pack of 15 ) - image
40mm BEWI EPS70 Jabfloor Floor Polystyrene Insulation ( Pack of 15 )
Jablite expanded polystyrene EPS insulation Pack Length: 36000mmPack Width: 18000mmPack coverage: 43.20m2Thickness: 40mmQuantity: Pack Of 15Grade: 70 (kPa)
£ 100.77
£ 120.92 Inc VAT
40mm Unilin Safe-R SR/UF Phenolic Floor Insulation Board ( Pack of 7 ) - image
40mm Unilin Safe-R SR/UF Phenolic Floor Insulation Board ( Pack of 7 )
Rigid Phenolic Floor Insulation Board Pack Length: 16800mmPack Width: 8400mmPack coverage: 20.16m2Thickness: 40mmQuantity: Pack Of 7
Last known price: £415.77
£ 498.92 Inc VAT
40mm Unilin Thin-R XT/UF PIR Floor Insulation Board - image
40mm Unilin Thin-R XT/UF PIR Floor Insulation Board
PIR Floor Insulation Board Pack Length: 2400mmPack Width: 1200mmPack coverage: 2.88m2Thickness: 40mmQuantity: 1 Sheet
£ 24.81
£ 29.77 Inc VAT
40mm Kingspan Thermafloor TF70 PIR Floor Insulation Board - image
40mm Kingspan Thermafloor TF70 PIR Floor Insulation Board
A high performance rigid thermoset polyisocyanurate (PIR) insulation. Pack Length: 2400mmPack Width: 1200mmPack coverage: 2.88m2Thickness: 40mmQuantity: 1 Sheet
£ 33.20
£ 39.84 Inc VAT
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