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170mm Stylite Graphite (Grey) EPS Insulation Board

170mm Stylite Plustherm Grey EPS EWI 70 Insulation Board 1200mm x 600mm - 0.72m2
170mm Stylite Plustherm Grey EPS EWI 70 Insulation Board 1200mm x 600mm - 0.72m2
170mm Stylite Plustherm Grey EPS EWI 70 Insulation Board 1200mm x 600mm - 0.72m2
170mm Stylite Plustherm Grey EPS EWI 70 Insulation Board 1200mm x 600mm - 0.72m2
170mm Stylite Graphite (Grey) EPS Insulation Board
  • 170mm Stylite Plustherm Grey EPS EWI 70
  • External Wall Polystyrene Insulation Board
  • Easy to install 1200mm x 600mm - 0.72m2
  • EWI External Wall Insulation Systems
  • EWI EPS 70 Thermal Conductivity: 0.032W/mK
Estimated delivery:
In Stock
£ 34.92
Ex VAT: £ 29.10
  • Brand: Stylite®
  • Model: 170mm Grey EPS EWI 70
  • Dimensions: 1,200mm x 600mm x 170mm
  • SKU: 170mm
  • Product code: P1-2474
  • MPN: 170mm Grey EPS EWI 70

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170mm Stylite Plustherm Grey EPS EWI 70 External Wall Polystyrene Insulation Board is a graphite thermal insulation board manufactured from Expanded Polystyrene (EPS), used in External Wall Insulation (EWI) systems to enhance thermal performance of commercial and residential buildings.

Stylite Expanded Polystyrene Insulation Board 1200mm x 600mm x 170mm is an ideal thermal insulation material that can be easily fixed to the existing wall substrate to instantly improve the appearance and performance of the wall.

170mm Grey External Wall Polystyrene Insulation Board is compatible for use with many different wall constructions, from solid brickwork to timber frame walls.

Insulating the external side of the wall as opposed to the internal side of the wall will reduce the risk of any interstitial condensation forming within the wall.

Typically external wall insulation is covered with a rendered finish which will protect the insulation, this can be applied in many different ways depending on the system used.

Graphite (Grey EPS) insulation is the most popular thermal insulation material used in external wall insulation systems due to its great value for money.

Choosing a cost-effective Grey EPS EWI 70 External Wall Insulation Board you can cut down the cost of your insulation without loosing quality or thermal performance of your building.




Thickness: 170mm

Width: 600mm

Length: 1200mm

Board Coverage: 0.72m2

Density: 20kg/m3

Thermal Conductivity: 0.032W/mK

R-Value: 5.66m2K/W

Water vapour resistivity: 20MN.s/g.m

Compressive Strength: >70 kPa

Fire Rating (Reaction to Fire): E

Water Vapour Diffusion Resistance (μ): 30-70


Installation of EWI Grey Polystyrene Insulation:

 · Grey polystyrene has the same adhesive properties as white polystyrene and there is no obligation to sand it before sticking. 

 · However, wiping the polystyrene surface before sticking (regardless of its color) improves the adhesion of the adhesive to the fixing. 

 · The surface grinding operation must be performed on the upper side, before embedding the mesh.


How to stick Grey EPS Insulation Boards:

 · Some manufacturers recommend gluing graphite polystyrene boards using a universal adhesive intended for embedding the mesh and for fixing polystyrene, not only polystyrene adhesive.

 · We recommend Ceresit ZU Insulation Adhesive, Ceresit CT87 White Flexible Adhesive or Ceresit CT84 Express PU Foam Adhesive.

 · Experience shows that if we buy a really good polystyrene adhesive, it will work.

 · It is worth recalling that each polystyrene should be glued with the circumferential-point method. 

 · After applying the glue, it should be on at least 40% of the board surface. 

 · Dot and dab method should not be used anymore, but still many contractors stick polystyrene only to "dabs", insisting that they have been doing it for years and it is fine. 

 · This error can cause the boards to fall off, especially those made of graphite polystyrene.


*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

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

Board covarage 0.72 m2
Colour Grey ǀ Graphite
Compressive Strength 70 kPa
Density 20kg/m3
Length 1200mm
Material Expanded Polystyrene
Profile Square Edge
R-Value 5.66m2K/W
Reaction to fire Euroclass E
Thermal Conductivity 0.032W/mK
Thickness 170mm
Water Vapour Resistivity 20MN.s/g.m
Width 600mm
Application Temperature from +5 °C to +25 °C
Shipping method Rigid Vehicle ǀ Courier
Applications External Wall Insulation Systems
ETA Notification Yes
Features High performance thermal insulation board
Manufacturer SPI Stylite Styrene®

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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.
170mm Stylite Plustherm Grey EPS EWI 70 Insulation Board 1200mm x 600mm - 0.72m2
170mm Stylite Graphite (Grey) EPS Insulation Board
£ 34.92