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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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13 products
newest
25mm Kay-Metzeler EPS70 Polystyrene Insulation Board (Pack of 12) - image
25mm Kay-Metzeler EPS70 Polystyrene Insulation Board (Pack of 12)
EPS insulation board Pack Length: 28800mmPack Width: 14400mmPack coverage: 34.56m2Thickness: 25mmQuantity: Pack Of 12
Last known price: £81.55
£ 97.86 Inc VAT
25mm Rockwool RW5 Acoustic Insulation Slab ( Pack of 8 )
stone wool insulation slab Pack Length: 9600mmPack Width: 4800mmPack coverage: 5.76m2Thickness: 25mmQuantity: Pack Of 8
Last known price: £46.55
£ 55.86 Inc VAT
25mm Rockwool RW3 Acoustic Insulation Slab ( Pack of 16 )
stone wool insulation slab Pack Length: 19200mmPack Width: 9600mmPack coverage: 11.52m2Thickness: 25mmQuantity: Pack Of 16
Last known price: £46.55
£ 55.86 Inc VAT
25mm Knauf Insulation Rocksilk RS100 Building Slab ( Pack of 12 )
Rock Mineral Wool Slabs Pack Length: 14400mmPack Width: 7200mmPack coverage: 8.64m2Thickness: 25mmQuantity: Pack Of 12
£ 43.41
£ 52.09 Inc VAT
25mm Knauf Insulation Rocksilk RS60 Building Slab ( Pack of 18 )
Rock Mineral Wool Slabs Pack Length: 21600mmPack Width: 10800mmPack coverage: 12.96m2Thickness: 25mmQuantity: Pack Of 18
£ 43.41
£ 52.09 Inc VAT
25mm Knauf Insulation Rocksilk RS45 Building Slab ( Pack of 20 )
Rock Mineral Wool Slabs Pack Length: 24000mmPack Width: 12000mmPack coverage: 14.40m2Thickness: 25mmQuantity: Pack Of 20
£ 43.41
£ 52.09 Inc VAT
25mm BEWI EPS150 Jabfloor Floor Polystyrene Insulation ( Pack of 24 )
Jablite expanded polystyrene EPS insulation Pack Length: 57600mmPack Width: 28800mmPack coverage: 69.12m2Thickness: 25mmQuantity: Pack of 24
£ 162.84
£ 195.41 Inc VAT
25mm BEWI EPS100 Jabfloor Floor Polystyrene Insulation ( Pack of 24 )
Jablite expanded polystyrene EPS insulation Pack Length: 57600mmPack Width: 28800mmPack coverage: 69.12m2Thickness: 25mmQuantity: Pack of 24Grade: 100 (kPa)
£ 162.84
£ 195.41 Inc VAT
25mm BEWI EPS70 Jabfloor Floor Polystyrene Insulation ( Pack of 24 ) - image
25mm BEWI EPS70 Jabfloor Floor Polystyrene Insulation ( Pack of 24 )
Jablite expanded polystyrene EPS insulation Pack Length: 57600mmPack Width: 28800mmPack coverage: 69.12m2Thickness: 25mmQuantity: Pack of 24Grade: 70 (kPa)
£ 94.88
£ 113.86 Inc VAT
25mm Unilin Safe-R SR/UF Phenolic Floor Insulation Board ( Pack of 12 ) - image
25mm Unilin Safe-R SR/UF Phenolic Floor Insulation Board ( Pack of 12 )
Rigid Phenolic Floor Insulation Board Pack Length: 28800mmPack Width: 14400mmPack coverage: 34.56m2Thickness: 25mmQuantity: Pack Of 12
Last known price: £341.21
£ 409.45 Inc VAT
25mm Unilin Xtroliner XO/UF PIR Floor Insulation Board  ( Pack of 12 ) - image
25mm Unilin Xtroliner XO/UF PIR Floor Insulation Board ( Pack of 12 )
PIR Floor Insulation Board Pack Length: 28800mmPack Width: 14400mmPack coverage: 34.56m2Thickness: 25mmQuantity: Pack Of 12
Last known price: £284.74
£ 341.69 Inc VAT
25mm Unilin Thin-R XT/UF PIR Floor Insulation Board - image
25mm Unilin Thin-R XT/UF PIR Floor Insulation Board
PIR Floor Insulation Board Pack Length: 2400mmPack Width: 1200mmPack coverage: 2.88m2Thickness: 25mmQuantity: 1 Sheet
£ 19.80
£ 23.76 Inc VAT
25mm Kingspan Thermafloor TF70 PIR Floor Insulation Board - image
25mm Kingspan Thermafloor TF70 PIR Floor Insulation Board
A high performance rigid thermoset polyisocyanurate (PIR) insulation. Pack Length: 2400mmPack Width: 1200mmPack coverage: 2.88m2Thickness: 25mmQuantity: 1 Sheet
£ 25.89
£ 31.07 Inc VAT
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