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80mm SR/CW Cavity Wall Insulation Board Xtratherm Safe-R ǀ pack of 4

80mm Xtratherm Safe-R SR/CW Phenolic Partial Fill Cavity Insulation - pack of 4
80mm SR/CW Cavity Wall Insulation Board Xtratherm Safe-R ǀ pack of 4
  • Thermal Conductivity: 0.020W/mK
  • For New Build or Refurbishment
  • Reaction to Fire Euroclass D -s1, d0
  • BBA Certification No. 10/4803
  • BRE Green Guide A+ Rated - Building Regulations
Estimated delivery:
In Stock
£ 117.49
Ex VAT: £ 97.91
  • Brand: Xtratherm®
  • Model: 80mm SR/CW Cavity Insulation
  • Dimensions: 1,200mm x 450mm x 80mm
  • SKU: 80mm
  • Product code: P1-1256
  • MPN: 80mm Safe-R SR/CW Partial Fill Cavity

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80mm SR/CW Partial Fill Cavity Wall Insulation Xtratherm Safe-R is a top-class phenolic foam rigid cavity insulation board with a low emissivity foil facings designed for use in traditional masonry walls.

A high-performance BBA certified 1200mm x 450mm x 80mm square edge board with an approved thermal conductivity (lambda value) of 0.021W/mK and excellent Euroclass B-s1, d0 Fire Classification.

Xtratherm SR/CW Cavity Wall Insulation Board provides excellent U-Values whilst maintaining a residual cavity, offering protection from wind driven rain.

The high performance to thickness ratio of SR/CW allows for excellent U-Values to be achieved within traditional constructions without dramatically increasing the overall width of the wall. 

Using SR/CW allows the residual cavity to be maintained, providing an effective method of preventing moisture ingression.

Xtratherm products are stable, rot proof and will remain effective for the life span of the building (depending on specification and installation).

Superior performance phenolic insulation with BRE Green Guide A+ Rating.

Partial fill masonry walls are the predominant construction method for traditional buildings.




Width: 450mm

Length: 1200mm

Pack Quantity: 4

Pack Coverage: 2.16m2

Profile: Square Edge

R-Value: 3.80m2K/W

Thermal Conductivity: 0.020W/mK

Compressive Strength: >100 (kPa)

Reaction to Fire Euroclass: D -s1, d0


Key points:

 · BBA Certified.

 · Superior performance rigid phenolic insulation.

 · Euroclass B Fire Classification.

 · Thermal conductivity (lambda value) of 0.020 W/mK.

 · Reduced thermal bridging.

 · Reduced risk of condensation.

 · For Partial Fill Cavity Walls

 · Lightweight and easy to install.

 · BRE Green Guide A+ Rated

 · Integral vapour barrier.

 · Reduced insulation thickness.

 · Standard size 450mm x 1200mm cavity boards.


Handling, Cutting and Storage:

 · Xtratherm insulation should be stored off the ground, on a clean flat surface and must be stored under cover. 

 · The polythene wrapping is not considered adequate protection for outside exposure. 

 · Care should be taken to protect the insulation in storage and during the build process.

 · Appropriate PPE should be worn when handling insulation.


Certification and standards:

 · BBA Certification No.10/4803.

 · BS EN ISO 9001 Quality Management System.

 · BS EN ISO 14001 Environmental Management System.

 · BS EN 13166.


*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 


*Special Product - Non returnable cancelable.

Board covarage 2.16 m2
Compressive Strength >100 (kPa)
Length 1200mm
Material Phenolic resins
Profile Square Edge
R-Value 3.80m2K/W
Thermal Conductivity 0.020W/mK
Thickness 80mm
Width 450mm
Fire Classification Euroclass B-s1, d0
Finish Low emissivity foil facings
Shipping method Articulated Vehicle ǀ Courier
Applications Traditional masonry walls
BBA Certified Yes (no. 10/4803)
Vapour Control Layer Yes, build in
Foil faced Both sides
ETA Notification Yes
Features BRE Green Guide A+ Rated
Manufacturer Xtratherm Safe-R®

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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.
80mm Xtratherm Safe-R SR/CW Phenolic Partial Fill Cavity Insulation - pack of 4
80mm SR/CW Cavity Wall Insulation Board Xtratherm Safe-R ǀ pack of 4
£ 117.49