Underfloor Insulation

Over 20% of total building heat loss is through the floor. Choose from our range of underfloor insulation and start saving money on heating bills today!
68 products
Danosa Danopren TR XPS Insulation 600mm x 1250mm - All Sizes
Danosa Danopren TR XPS Insulation 600mm x 1250mm - All Sizes
Vendor
Danosa
Danosa Danopren TR XPS Insulation 600mm x 1250mm - All Sizes
  • Thermal conductivity: 0.033 W/mK
  • Environmental: CFC, HCFC, HFC-free
  • Certifications: UNE-EN 13164, EN ISO 9001
Regular price
£43.40£52.08
Sale price
Was £0.00
£43.40 £52.08
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Celotex 20mm TB4020 2.4m x 1.2m
Celotex 20mm TB4020 2.4m x 1.2m
Free Delivery
on orders over £300
Vendor
Celotex
Celotex 20mm TB4020 2.4m x 1.2m
Regular price
£12.72£15.26
Sale price
Was £0.00
£12.72 £15.26
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140mm Celotex XR4140 Insulation Board 2.4m x 1.2m
140mm Celotex XR4140 Insulation Board 2.4m x 1.2m
Free Delivery
on orders over £300
Vendor
Celotex
140mm Celotex XR4140 Insulation Board 2.4m x 1.2m
  • Cut-to-fit for rafters/joists
  • High thermal performance
  • Environmentally friendly
Regular price
£44.95£53.94
Sale price
Was £0.00
£44.95 £53.94
Sold out
Kingspan GreenGuard GG300 1.25m x 0.6m - All Sizes
Kingspan GreenGuard GG300 1.25m x 0.6m - All Sizes
Free Delivery
on orders over £300
Vendor
Kingspan
Kingspan GreenGuard GG300 1.25m x 0.6m - All Sizes
  • Unmatched compressive strength
  • Fire performance excellence
Regular price
£49.86£59.83
Sale price
Was £0.00
£49.86 £59.83
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Kingspan Kooltherm K103 Floorboard (All Sizes) 2400mm x 1200mm
Kingspan Kooltherm K103 Floorboard (All Sizes) 2400mm x 1200mm
Free Delivery
on orders over £300
Vendor
Kingspan
Kingspan Kooltherm K103 Floorboard (All Sizes) 2400mm x 1200mm
  • Premium lower lambda insulation: Kingspan Kooltherm K103 Floorboard enhances flooring performance with fibre-free phenolic core.
  • Durable construction: Glass tissue facings, autohesively bonded, ensure lasting quality and ease of installation.
  • Trusted quality: Manufactured underquality standards for safety and reliability.
Regular price
£285.00£342.00
Sale price
Was £0.00
£285.00 £342.00
Sold out
EcoTherm Eco-Versal Insulation Board 2.4m x 1.2m - All Thicknesses
EcoTherm Eco-Versal Insulation Board 2.4m x 1.2m - All Thicknesses
Free Delivery
on orders over £300
Vendor
Ecotherm
EcoTherm Eco-Versal Insulation Board 2.4m x 1.2m - All Thicknesses
  • All-in-one Eco-versal Insulation Board for thermal conductivity (0.022 W/mK)
  • Rigid PIR core with aluminum composite foil facing, perfect for roofs, walls, and floors
  • Lightweight, easy to cut, and install compared to some other commonly used insulants; offers warmth and durability
Regular price
£11.17£13.40
Sale price
Was £0.00
£11.17 £13.40
Sold out
Celotex 110mm XR4110 2.4m x 1.2m
Celotex 110mm XR4110 2.4m x 1.2m
Free Delivery
on orders over £300
Vendor
Celotex
Celotex 110mm XR4110 2.4m x 1.2m
  • Cost-effective, high-performance insulation board
  • Thermal conductivity of 0.022W/mK, suitable for various applications
  • Environmentally friendly with zero ozone depletion potential
Regular price
£38.50£46.20
Sale price
Was £0.00
£38.50 £46.20
Sold out
130mm Celotex XR4130 2.4m x 1.2m
130mm Celotex XR4130 2.4m x 1.2m
Free Delivery
on orders over £300
Vendor
Celotex
130mm Celotex XR4130 2.4m x 1.2m
  • Premium 130mm Celotex XR4130 insulation
  • Polyisocyanurate (PIR) for eco-friendly high performance
  • Cost-effective, BBA certified, A+ rating, meets Building Regulations
Regular price
£43.95£52.74
Sale price
Was £0.00
£43.95 £52.74
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Celotex 165mm XR4165 2.4m x 1.2m (Pallet of 12)
Celotex 165mm XR4165 2.4m x 1.2m (Pallet of 12)
Free Delivery
on orders over £300
Vendor
Celotex
Celotex 165mm XR4165 2.4m x 1.2m (Pallet of 12)
  • 165mm Celotex XR4000 PIR insulation board
  • Achieves A+ rating, low U-values, and BBA certifications
  • Easy installation, cost-effective, long-lasting thermal performance
Regular price
£778.00£933.60
Sale price
Was £0.00
£778.00 £933.60
Sold out
Unilin Thin-R 2.4m x 1.2m (All Sizes)
Unilin Thin-R 2.4m x 1.2m (All Sizes)
Vendor
Unilin
Unilin Thin-R 2.4m x 1.2m (All Sizes)
Regular price
£11.17£13.40
Sale price
Was £0.00
£11.17 £13.40
Sold out
PIR-Plywood Laminate Insulation Board (All Sizes) - 2.4m x 1.2m
PIR-Plywood Laminate Insulation Board (All Sizes) - 2.4m x 1.2m
Vendor
Mannok
PIR-Plywood Laminate Insulation Board (All Sizes) - 2.4m x 1.2m
  • Composite insulation board for warm flat roof decks
  • PIR foam core with aluminum facings and 6mm WPB plywood layer
  • Provides strength, rigidity, and minimal thickness for easy installation in new or refurbishment projects.
Regular price
£1,283.33£1,540.00
Sale price
Was £0.00
£1,283.33 £1,540.00
Sold out
Celotex XR4200 200mm x 2.4m x 1.2m (Pallet of 12)
Celotex XR4200 200mm x 2.4m x 1.2m (Pallet of 12)
Free Delivery
on orders over £300
Vendor
Celotex
Celotex XR4200 200mm x 2.4m x 1.2m (Pallet of 12)
  • High-performance Celotex XR4200 insulation board
  • Low global warming impact, zero ozone depletion
  • Superb thermal conductivity, easy installation
Regular price
£935.40£1,122.48
Sale price
Was £0.00
£935.40 £1,122.48
Sold out
Ballytherm 2.4m x 1.2m - All Sizes
Ballytherm 2.4m x 1.2m - All Sizes
Vendor
Ballytherm
Ballytherm 2.4m x 1.2m - All Sizes

We're sorry to inform you that we no longer supply the Ballytherm 2.4m x 1.2m insulation product. However, we have several other high quality alternatives to meet your insulation needs.

Thank you for choosing Insulation4Less for your insulation needs. If you have any questions or need further assistance, feel free to contact our customer support team.

Regular price
£16.20£19.44
Sale price
Was £0.00
£16.20 £19.44
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Safe-R 2.4m x 1.2m (All Sizes)
Safe-R 2.4m x 1.2m (All Sizes)
Vendor
Unilin
Safe-R 2.4m x 1.2m (All Sizes)
Regular price
£0.00£0.00
Sale price
Was £0.00
£0.00 £0.00
Sold out
Danosa 75mm XPS Concrete Slab Grey - 500mm x 500mm
Danosa 75mm XPS Concrete Slab Grey - 500mm x 500mm
Vendor
Danosa
Danosa 75mm XPS Concrete Slab Grey - 500mm x 500mm
Regular price
£10.56£12.67
Sale price
Was £0.00
£10.56 £12.67
Sold out
Basf Styrodur Xps (1265mm x 615mm) All Sizes
Basf Styrodur Xps (1265mm x 615mm) All Sizes
Vendor
BASF
Basf Styrodur Xps (1265mm x 615mm) All Sizes
Regular price
£78.02£93.62
Sale price
Was £0.00
£78.02 £93.62
Sold out
Kingspan GreenGuard GG500 600mm x 1250mm - All Sizes
Kingspan GreenGuard GG500 600mm x 1250mm - All Sizes
Free Delivery
on orders over £300
Vendor
Kingspan
Kingspan GreenGuard GG500 600mm x 1250mm - All Sizes
Regular price
£8.46£10.15
Sale price
Was £0.00
£8.46 £10.15
Sold out
Unilin Thin-R PIR 125mm x 2.4m x 1.2m
Unilin Thin-R PIR 125mm x 2.4m x 1.2m
Vendor
Unilin
Unilin Thin-R PIR 125mm x 2.4m x 1.2m
Regular price
£51.95£62.34
Sale price
Was £0.00
£51.95 £62.34
Sold out
Unilin Thin-R PIR 30mm x 2.4m x 1.2m
Unilin Thin-R PIR 30mm x 2.4m x 1.2m
Vendor
Unilin
Unilin Thin-R PIR 30mm x 2.4m x 1.2m
Regular price
£13.30£15.96
Sale price
Was £0.00
£13.30 £15.96
Sold out
Unilin Thin-R PIR 25mm x 2.4m x 1.2m
Unilin Thin-R PIR 25mm x 2.4m x 1.2m
Vendor
Unilin
Unilin Thin-R PIR 25mm x 2.4m x 1.2m
Regular price
£11.17£13.40
Sale price
Was £0.00
£11.17 £13.40
Sold out

Insulation4less.co.uk offers a comprehensive range of underfloor insulation products, catering to a variety of needs for thermal efficiency and comfort in residential and commercial buildings. Our underfloor insulation solutions are designed to reduce heat loss, improve energy efficiency, and enhance the comfort of your space.

PIR Insulation Boards

Celotex and Recticel brands lead our offering with their General Purpose PIR (Polyisocyanurate) Insulation Boards. Available in dimensions of 2.4m x 1.2m and varying in thicknesses from 12mm to 200mm, these boards provide a high-performance thermal solution for a range of flooring applications. The PIR boards are suited for both new builds and refurbishment projects where effective thermal insulation is crucial. They are also a popular choice for their ease of installation and structural strength.

XPS Insulation

For applications requiring enhanced moisture resistance and durability, our selection includes Danosa Danopren TR XPS Insulation and BASF Styrodur XPS. These Extruded Polystyrene (XPS) products offer robust insulation performance, especially in areas susceptible to moisture, such as basements and areas with high ground water levels.

EPS Insulation

EPS 70 is another key product within our underfloor insulation range. Expanded Polystyrene (EPS) is lightweight, versatile, and cost-effective, making it suitable for a variety of floor insulation applications where a balance between performance and budget is required.

Specialty Insulation Boards

Our catalogue also includes specialized solutions like Kingspan Thermafloor TF70 and Kingspan Kooltherm K103 Floorboards, which provide high thermal efficiency in a slimmer profile. These products are ideal when space is at a premium and are renowned for their exceptional compressive strength.

EcoTherm Eco-versal and Greenguard products also form part of our high-performance underfloor insulation, offering eco-friendly options with excellent thermal properties.

Laminate Insulation Boards

For hybrid insulation and structural applications, we have PIR-Plywood Laminate Insulation Boards. These are composite products that offer the benefits of insulation coupled with the convenience of a pre-laminated plywood top, streamlining the installation process for underfloor systems.

Considerations for Selection

When choosing the right underfloor insulation, consider the following:

  • Thermal Performance: Check the R-value, which indicates the material's resistance to heat flow.
  • Compressive Strength: Important for floor applications to withstand load-bearing requirements.
  • Moisture Resistance: Essential in damp environments or on ground floors.
  • Space Constraints: Thinner, high-performance insulation might be necessary for limited spaces.
  • Sustainability: Eco-friendly options might be preferable for those seeking green building standards.

Underfloor insulation is a key component of a building's thermal envelope. Whether you're installing over a concrete slab, suspending floors, or retrofitting, our range of underfloor insulation products at Insulation4less.co.uk provides the quality, variety, and performance needed to meet the demands of your project.

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