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40mm Xtratherm XPS 300 Insulation Board (pack of 10)

40mm Xtratherm XPS 300 Insulation Board (pack of 10)
40mm Xtratherm XPS 300 Insulation Board (pack of 10)
40mm Xtratherm XPS 300 Insulation Board (pack of 10)
40mm Xtratherm XPS 300 Insulation Board (pack of 10)
40mm Xtratherm XPS 300 Insulation Board (pack of 10)
  • 40mm Extruded Polystyrene Xtratherm XPS 300 kPa
  • For use in commercial, industrial and cold storage areas
  • Closed-cell structure, which prevents moisture-absorption
  • Very low lambda values and compressive loading capabilities
  • Xtratherm XPS Sheets are 1250mm long by 600mm wide boards
Estimated delivery:
In Stock
£ 148.09
Ex VAT: £ 123.41
  • Brand: Xtratherm®
  • Model: 40mm Xtratherm XPS 300
  • Weight: 10.69kg
  • Dimensions: 1,250mm x 600mm x 40mm
  • SKU: 40mm XPS 300
  • Product code: P1-2676
  • MPN: 40mm Xtratherm XPS 300

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40mm Extruded Polystyrene Xtratherm XPS is a rigid foam extruded polystyrene insulation board providing a durable thermal solution to technically demanding applications where high compressive loading of 300kPa is a requirement.

Extruded Polystyrene XPS 300 is an ideal solution for use in commercial, industrial and cold storage areas where vehicular traffic and high loading is an issue.

XPS Rigid Foam Insulation Boards are suitable for many demanding and varied insulation applications, including inverted and green roofs, zero fall roof designs, floors, walls and below-ground works.

Extruded Polystyrene (XPS) differs from Expanded Polystyrene (EPS) in that it has a closed-cell structure, which prevents moisture-absorption and results in very low lambda values and compressive loading capabilities.

Xtratherm XPS 40mm Sheets are 1250mm long by 600mm wide boards, used mainly in commercial, industrial and cold storage areas like floors, underground constructions, basements, car parks, swimming pools, flat and pitched roofs.

The XPS panel offers 4 times higher than standard EPS (Polystyrene) resistance to pressure which is 300kPa where standard expanded polystyrene is only 70kPa.

This High-Performance Extruded Polystyrene (XPS 300) has a declared lambda value (thermal conductivity) of 0.033 W/mK.

Extruded Polystyrene sheets are available in 300kPa, 500kPa and 700kPa.




Thickness: 40mm

Length: 1250mm

Width: 600mm

Size: 40mm x 600mm x 1250mm

Board coverage: 0.75m2

Pack coverage: 7.50m2

Density: 35kg/m3

Weight (pack): 10.69kg

Thermal Conductivity: 0.033 W/mk

R-Value: 1.20m2K/W

Commpressive Strength: 300kPa

Edge profile: Rebate Edge

Surface: Smooth

Tensile strength: TR200(kPa)

Water vapour permeability: 150(µ)


Xtratherm XPS 300 Rigid Foam Insulation Board Features:

 · High compressive loading of 300kPa.

 · Commercial and Industrial applications.

 · Outstanding energy efficiency.

 · Exceptional compressive strength.

 · Prevents moisture-absorption.

 · Lambda value (thermal conductivity) 0.033 – 0.035 W/mK.

 · Available in 300kPa, 500kPa and 700kPa.

 · Excellent moisture resistance.

 · Easy to install and handle.

 · 1250mm x 600mm XPS sheets.

 · 4 times stronger than standard EPS.

 · Application versatility.

 · Closed-cell structure.

 · Rigid extruded polystyrene (XPS) foam.

 · 100% recyclable.

 · Waterproofing solution.

 · Thermal Insulation solution.


*Further information may be found in our Downloads section.

Fairly easy to access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet ǀ 

Board covarage 7.5 m2
Commpressive Strength 300kPa
Density 35kg/m3
Length 1250mm
Material Extruded Polystyrene (XPS)
Pack Quantity 10no. XPS Sheets
Profile Rebated edge
R-Value 1.20m2K/W
Reaction to fire Euroclass E
Size 40mm x 600mm x 1250mm
Thermal Conductivity 0.033 W/mK
Thickness 40mm
Water Vapour Resistivity 150(µ)
Weight/m2 1.42kg
Width 600mm
Finish Smooth
Shipping method Articulated Vehicle ǀ Courier
Applications Floor, Construction, Basement, Car park, Below-ground works
Tensile Strength TR200(kPa)
ETA Notification Yes
Features Rigid XPS (Extruded Polystyrene) Insulation Foam Board
Manufacturer Xtratherm® XPS 300

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We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
40mm Xtratherm XPS 300 Insulation Board (pack of 10)
40mm Xtratherm XPS 300 Insulation Board (pack of 10)
£ 148.09