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!
Celotex GA4000 General Purpose PIR Insulation Board 2.4m x 1.2m (All Sizes)
Celotex GA4000 General Purpose PIR Insulation Board 2.4m x 1.2m (All Sizes) Floor Insulation
Vendor
Celotex
Regular price
from £11.90 £14.28
Sale price
from £11.90 £14.28
Regular price
£0.00
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Celotex 50mm GA4050 2.4m x 1.2m
Celotex 50mm GA4050 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£17.49 £20.99
Sale price
£17.49 £20.99
Regular price
£0.00
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Celotex 100mm GA4100 2.4m x 1.2m | 100mm Celotex
Celotex 100mm GA4100 2.4m x 1.2m | 100mm Celotex Floor Insulation
Vendor
Celotex
Regular price
£29.72 £35.66
Sale price
£29.72 £35.66
Regular price
£0.00
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Celotex 25mm TB4025 2.4m x 1.2m
Celotex 25mm TB4025 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£11.90 £14.28
Sale price
£11.90 £14.28
Regular price
£0.00
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per 
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75mm Celotex GA4075 2.4m x 1.2m
75mm Celotex GA4075 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£24.90 £29.88
Sale price
£24.90 £29.88
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£0.00
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Celotex TB4000 Insulation Board 1.2m x 2.4m - 25mm to 40mm
Celotex TB4000 Insulation Board 1.2m x 2.4m - 25mm to 40mm Floor Insulation
Vendor
Celotex
Regular price
from £11.90 £14.28
Sale price
from £11.90 £14.28
Regular price
£0.00
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per 
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Celotex 120mm XR4120 2.4m x 1.2m
Celotex 120mm XR4120 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£38.30 £45.96
Sale price
£38.30 £45.96
Regular price
£0.00
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Celotex XR4000 Insulation Board 1.2m x 2.4m - 110mm to 200mm
Celotex XR4000 Insulation Board 1.2m x 2.4m - 110mm to 200mm Loft Insulation
Vendor
Celotex
Regular price
from £37.84 £45.41
Sale price
from £37.84 £45.41
Regular price
£0.00
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Celotex 40mm TB4040 2.4m x 1.2m
Celotex 40mm TB4040 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£17.05 £20.46
Sale price
£17.05 £20.46
Regular price
£0.00
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Recticel Eurothane GP (2.4m x 1.2m) All Sizes
Recticel Eurothane GP (2.4m x 1.2m) All Sizes Insulation
Vendor
Recticel
Regular price
from £12.00 £14.40
Sale price
from £12.00 £14.40
Regular price
£0.00
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70mm Celotex GA4070 2.4m x 1.2m
70mm Celotex GA4070 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£25.69 £30.83
Sale price
£25.69 £30.83
Regular price
£0.00
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EPS 70 (All Sizes) 2400mm x 1200mm
EPS 70 (All Sizes) 2400mm x 1200mm Floor Insulation
Vendor
Insulation4Less
Regular price
from £61.56 £73.87
Sale price
from £61.56 £73.87
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£0.00
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150mm Celotex XR4150 2.4m X 1.2m | Celotex 150mm
150mm Celotex XR4150 2.4m X 1.2m | Celotex 150mm Floor Insulation
Vendor
Celotex
Regular price
£44.95 £53.94
Sale price
£44.95 £53.94
Regular price
£0.00
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per 
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Celotex 60mm GA4060 2.4m x 1.2m
Celotex 60mm GA4060 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£22.90 £27.48
Sale price
£22.90 £27.48
Regular price
£0.00
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per 
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90mm Celotex GA4090 2.4m x 1.2m
90mm Celotex GA4090 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£29.99 £35.99
Sale price
£29.99 £35.99
Regular price
£0.00
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per 
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Celotex 30mm TB4030 2.4m x 1.2m
Celotex 30mm TB4030 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£14.10 £16.92
Sale price
£14.10 £16.92
Regular price
£0.00
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per 
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Kingspan Thermafloor TF70 Floor Board (All Sizes) 2.4m x 1.2m
Kingspan Thermafloor TF70 Floor Board (All Sizes) 2.4m x 1.2m Floor Insulation
Vendor
Kingspan
Regular price
from £107.90 £129.48
Sale price
from £107.90 £129.48
Regular price
£0.00
Unit price
per 
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80mm Celotex GA4080 2.4m x 1.2m
80mm Celotex GA4080 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£27.89 £33.47
Sale price
£27.89 £33.47
Regular price
£0.00
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per 
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Mannok Insulation Board 1.2m x 2.4m (All Sizes)
Mannok Insulation Board 1.2m x 2.4m (All Sizes) Floor Insulation
Vendor
Mannok
Regular price
from £0.00 £0.00
Sale price
from £0.00 £0.00
Regular price
£0.00
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per 
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12mm Celotex TB4012 2.4m x 1.2m
12mm Celotex TB4012 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£0.00 £0.00
Sale price
£0.00 £0.00
Regular price
£0.00
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per 
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Danosa Danopren TR XPS Insulation 600mm x 1250mm - All Sizes
Danosa Danopren TR XPS Insulation 600mm x 1250mm - All Sizes Floor Insulation
Vendor
Danosa
Regular price
from £41.15 £49.38
Sale price
from £41.15 £49.38
Regular price
£0.00
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Celotex 20mm TB4020 2.4m x 1.2m
Celotex 20mm TB4020 2.4m x 1.2m Wall Insulation
Vendor
Celotex
Regular price
£15.45 £18.54
Sale price
£15.45 £18.54
Regular price
£0.00
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140mm Celotex XR4140 Insulation Board 2.4m x 1.2m
140mm Celotex XR4140 Insulation Board 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£44.95 £53.94
Sale price
£44.95 £53.94
Regular price
£0.00
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Greenguard GG300 1.25m x 0.6m - All Sizes
Greenguard GG300 1.25m x 0.6m - All Sizes Wall Insulation
Vendor
Kingspan
Regular price
from £44.88 £53.86
Sale price
from £44.88 £53.86
Regular price
£0.00
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per 
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Kingspan Kooltherm K103 Floorboard (All Sizes) 2400mm x 1200mm
Kingspan Kooltherm K103 Floorboard (All Sizes) 2400mm x 1200mm Floor Insulation
Vendor
Kingspan
Regular price
from £278.95 £334.74
Sale price
from £278.95 £334.74
Regular price
£0.00
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per 
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EcoTherm Eco-versal Insulation Board (2.4m x 1.2m) - All Sizes
EcoTherm Eco-versal Insulation Board (2.4m x 1.2m) - All Sizes Floor Insulation
Vendor
Ecotherm
Regular price
from £13.37 £16.04
Sale price
from £13.37 £16.04
Regular price
£0.00
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per 
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Celotex 110mm XR4110 2.4m x 1.2m
Celotex 110mm XR4110 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£37.84 £45.41
Sale price
£37.84 £45.41
Regular price
£0.00
Unit price
per 
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130mm Celotex XR4130 2.4m x 1.2m
130mm Celotex XR4130 2.4m x 1.2m Floor Insulation
Vendor
Celotex
Regular price
£44.70 £53.64
Sale price
£44.70 £53.64
Regular price
£0.00
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per 
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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) Wall Insulation
Vendor
Celotex
Regular price
£729.90 £875.88
Sale price
£729.90 £875.88
Regular price
£0.00
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per 
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Unilin Thin-R 2.4m x 1.2m (All Sizes)
Unilin Thin-R 2.4m x 1.2m (All Sizes) Floor Insulation
Vendor
Unilin
Regular price
from £16.56 £19.87
Sale price
from £16.56 £19.87
Regular price
£0.00
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per 
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PIR-Plywood Laminate Insulation Board (All Sizes) - 2.4m x 1.2m
PIR-Plywood Laminate Insulation Board (All Sizes) - 2.4m x 1.2m PIR-Plywood Laminate
Vendor
Mannok
Regular price
from £1,283.33 £1,540.00
Sale price
from £1,283.33 £1,540.00
Regular price
£0.00
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per 
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Celotex XR4200 200mm x 2.4m x 1.2m (Pallet of 12)
Celotex XR4200 200mm x 2.4m x 1.2m (Pallet of 12) Loft Insulation
Vendor
Celotex
Regular price
£952.28 £1,142.74
Sale price
£952.28 £1,142.74
Regular price
£0.00
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per 
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Ballytherm 2.4m x 1.2m - All Sizes
Ballytherm 2.4m x 1.2m - All Sizes Floor Insulation
Vendor
Ballytherm
Regular price
from £16.20 £19.44
Sale price
from £16.20 £19.44
Regular price
£0.00
Unit price
per 
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Safe-R 2.4m x 1.2m (All Sizes)
Safe-R 2.4m x 1.2m (All Sizes) Floor Insulation
Vendor
Unilin
Regular price
from £0.00 £0.00
Sale price
from £0.00 £0.00
Regular price
£0.00
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per 
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Danosa 75mm XPS Concrete Slab Grey - 500mm x 500mm
Danosa 75mm XPS Concrete Slab Grey - 500mm x 500mm Flat Roof Insulation
Vendor
Danosa
Regular price
£10.56 £12.67
Sale price
£10.56 £12.67
Regular price
£0.00
Unit price
per 
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Basf Styrodur Xps (1265mm x 615mm) All Sizes
BASF Styrodur XPS (1265mm x 615mm) All Sizes Insulation Board
Vendor
BASF
Regular price
from £78.02 £93.62
Sale price
from £78.02 £93.62
Regular price
£0.00
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per 
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GreenGuard GG500 600mm x 1250mm - All Sizes
GreenGuard GG500 600mm x 1250mm - All Sizes Floor Insulation
Vendor
Kingspan
Regular price
from £8.46 £10.15
Sale price
from £8.46 £10.15
Regular price
£0.00
Unit price
per 
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Unilin Thin-R PIR 125mm x 2.4m x 1.2m
Unilin Thin-R PIR 125mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £58.39 £70.07
Sale price
from £58.39 £70.07
Regular price
£0.00
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per 
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Unilin Thin-R PIR 30mm x 2.4m x 1.2m
Unilin Thin-R PIR 30mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £19.00 £22.80
Sale price
from £19.00 £22.80
Regular price
£0.00
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per 
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Unilin Thin-R PIR 25mm x 2.4m x 1.2m
Unilin Thin-R PIR 25mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £13.45 £16.14
Sale price
from £13.45 £16.14
Regular price
£0.00
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per 
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Unilin Thin-R PIR 150mm x 2.4m x 1.2m
Unilin Thin-R PIR 150mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £53.96 £64.75
Sale price
from £53.96 £64.75
Regular price
£0.00
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per 
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Unilin Thin-R PIR 140mm x 2.4m x 1.2m
Unilin Thin-R PIR 140mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £55.55 £66.66
Sale price
from £55.55 £66.66
Regular price
£0.00
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per 
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Unilin Thin-R PIR 130mm x 2.4m x 1.2m
Unilin Thin-R PIR 130mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £52.04 £62.45
Sale price
from £52.04 £62.45
Regular price
£0.00
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per 
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Unilin Thin-R PIR 120mm x 2.4m x 1.2m
Unilin Thin-R PIR 120mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £43.97 £52.76
Sale price
from £43.97 £52.76
Regular price
£0.00
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per 
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Unilin Thin-R PIR 100mm x 2.4m x 1.2m
Unilin Thin-R PIR 100mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £28.25 £33.90
Sale price
from £28.25 £33.90
Regular price
£0.00
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per 
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Unilin Thin-R PIR 90mm x 2.4m x 1.2m
Unilin Thin-R PIR 90mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £42.68 £51.22
Sale price
from £42.68 £51.22
Regular price
£0.00
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per 
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Unilin Thin-R PIR 80mm x 2.4m x 1.2m
Unilin Thin-R PIR 80mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £32.84 £39.41
Sale price
from £32.84 £39.41
Regular price
£0.00
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per 
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Unilin Thin-R PIR 75mm x 2.4m x 1.2m
Unilin Thin-R PIR 75mm x 2.4m x 1.2m Floor Insulation
Vendor
Unilin
Regular price
from £29.95 £35.94
Sale price
from £29.95 £35.94
Regular price
£0.00
Unit price
per 
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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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