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100mm Sundolitt XPS (extruded polystyrene sheets) 3m²/pack

100mm Sundolitt XPS (extruded polystyrene sheets) 3m²/pack
  • 100mm Sundolitt XPS300 Extruded Polystyrene Board
  • XPS Insulation Sheets highly-durable rigid thermal insulation boards
  • High moisture environments | Installed in severe wet weather conditions
  • Lightweight, easy to cut extruded polystyrene insulation 300kPa
  • Great Thermal performance and versatility able to withstand extreme loads
Estimated delivery:
In Stock
£ 116.27
Ex VAT: £ 96.89
  • Brand: Sundolitt
  • Model: 100mm XPS300 Sundolitt
  • Weight: 10.36kg
  • Dimensions: 1,250mm x 600mm x 100mm
  • SKU: 100mm XPS300
  • Product code: P1-2551
  • MPN: 100mm XPS300 Sundolitt

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100mm Sundolitt XPS300 (300kPa) Insulation Sheets are strong and durable rigid insulation boards made of extruded polystyrene used in a high moisture environment such as inverted roofs, flat or zero pitched roofs and green roofs systems.

XPS 300 Sundolitt is a lightweight, easy to cut extruded polystyrene insulation board that doesn't require any special equipment or tools, so can be stored and installed in severe wet weather conditions with no deterioration during its life.

Sundolitt XPS300 100mm, an extremely strong XPS provides a cost effective, low maintenance inverted roof solution where high strength of 300kPa and very good thermal performance are required.

XPS Sundolitt® is a closed cell insulation with high water resistance, an insulation board with exceptional thermal performance and versatility able to withstand extreme loads.

Extruded Polystyrene Sundolitt XPS is designed specifically to meet the needs of high performance insulation in the construction and civil engineering sectors particularly where it may be required to withstand extreme loads.

This insulation board can be used in solid flooring, foundation applications, industrial floors including cold stores and chilled storage facilities.

XPS is not affected by rain, snow or frost and its closed-cell formulation means it retains its insulation performance even in the event that it is installed in a moist environment or in buildings which may be subjected to leakage, precipitation or ingress of water.

Sundolitt® XPS provides excellent thermal performance and high compressive strength of 300kPa in domestic and non-domestic ground floor applications.

XPS is an ideal solution for use as a basement insulation, below ground to insulate the floors and walls ensuring long term performance below ground, even when installed below the water table.

Using XPS within a green roof provides extra cooling during hot summer months and significantly reduced heat loss in the winter.




Thickness: 100mm

Length: 1250mm

Width: 600mm

Size: 100mm x 600mm x 1250mm

Board coverage: 0.75m2

Pack coverage: 3.00m2

Density: 33kg/m3

Weight: 2.59kg / board

Thermal Conductivity: 0.036 W/mk

R-Value: 2.80m2K/W

Commpressive Strength: 300kPa

Edge profile: Rebate Edge

Surface: Smooth

Tensile strength: TR200(kPa)

Water vapour permeability: 150(µ)


Sundolitt® XPS300 Board Features:

 · Cost effective solution.

 · Low maintenance product.

 · Extremely lightweight sheets.

 · Easy to cut and customise on site.

 · Extremely strong and durable.

 · Requires no special equipment or tools.

 · Can be stored and installed in severe wet weather conditions.

 · Absorbs a minimum of water.

 · Has a long service life.

 · High compressive strength of 300kPa.

 · Very good thermal performance.


XPS 300 Sundolitt Applications:

 · Car parks.

 · Ports and docks.

 · Civil engineering.

 · Solid flooring.

 · Foundation applications.

 · Industrial floors.

 · Airports and runways.

 · Roads and motorways.

 · Large void fill.

 · Commercial and domestic flooring insulation.

 · Inverted roofing systems.

 · Cold stores and chilled storage facilities.

 · Flat or zero pitched roofs.

 · External wall insulation systems below DPC level.

 · Below ground to insulate the floors and walls.

 · Landscaping and groundworks.


*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 3.00 m2
Commpressive Strength 300kPa
Density 33kg/m3
Length 1250mm
Material Extruded Polystyrene (XPS)
Profile Rebated edge
R-Value 2.80m2K/W
Reaction to fire Euroclass E
Size 100mm x 600mm x 1250mm
Thermal Conductivity 0.036 W/mK
Thickness 100mm
Water Vapour Resistivity 150(µ)
Weight 2.59kg / board
Width 600mm
Finish Smooth
Shipping method Articulated Vehicle ǀ Courier
Applications High moisture environments ǀ Multi-purpose
Tensile Strength TR200(kPa)
ETA Notification Yes
Features Closed-cell rigid thermal XPS insulation
Manufacturer Sundolitt® XPS300

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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.
100mm Sundolitt XPS (extruded polystyrene sheets) 3m²/pack
100mm Sundolitt XPS (extruded polystyrene sheets) 3m²/pack
£ 116.27