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Insulation Manufacturer Pulls Full Class 0 Range

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Hope this is in the right place if not please move it.

As many know with the Grenfell tower fire the insulation used was a Cellotex RS5000 insulation which had a class 0 tested certification, this was pulled from supply not long after the incident due to it failing some of the tests that gave it its class 0 propertys.  The insulation is usually one that contractors substitute for more expensive insulation's i.e. Kingspan / xtratherm etc.  From the 1st September Cellotex had this on their website and have pulled the whole range of insulation that was Class 0 tested, see statement below:-

"Celotex announcement – 5000 Class 0 classification
1st September 2017

After careful consideration, we have taken the decision to temporarily suspend supply of some of our 5000 product range in light of a recent and unexpected test result. This relates to Celotex FR5000, Celotex CG5000, Celotex CF5000 and Celotex SL5000 which share the same insulation core and facer. 1

We recognise that this decision could have some practical implications for some of our customers for which we apologise. We hope in the present circumstances which are explained in further detail below, that customers will understand the reasons behind our decision.

A sample of our 5000 product was tested under Parts 6 and 7 of British Standard 476 (“BS 476”) in 2011 and achieved a Class 0 fire rating 2.

In April 2017, we sent a sample of RS5000 for independent testing under both Parts 6 and 7 of BS 476.  We were surprised when we learned, in August 2017, that whilst this sample continues to meet the standard for Class 1, the sample did not achieve a Class 0 rating. A sample of this product was used in a full system test for a rainscreen cladding system in 2014, where the system passed.   We understand that in August 2017 a sample of the same product passed 3 the DCLG test 5 4  for a full rainscreen cladding system.

All the products in the 5000 range share a core which is made of the same material (Polyisocyanurate or “PIR”).  They are marketed under different names according to their intended application (CG5000, FR5000, RS5000 etc.).  The sample tested in 2011 was of the product marketed as FR5000.  We applied the 2011 test results in relation to Celotex RS5000, Celotex CG5000, Celotex CF5000 and Celotex SL5000. 

We do not currently know why the RS5000 sample did not achieve a Class 0 rating in these later tests, given the results from 2011 and we are investigating this.  In light of this test result and the desire to act responsibly, we believe it is right to temporarily suspend supply of these 5000 ranges.  We would like to reassure all of our customers that we will provide additional information once we are in a position to do so in respect of both the results and the applications of these 5000 ranges, and following engagement with the relevant third parties.

We appreciate that many uses to which a product from these ranges is put will not require it to have the Class 0 rating.  However, in the current circumstances, we believe it is important that there should be clarity as to the applications the product can be used for with its revised rating. A temporary suspension of supply is the right thing to do in the circumstances and will, we anticipate, also help to achieve that clarity.  We shall be making appropriate amendments to our marketing materials. We are recommending to our distributors that they do not sell existing stock in this period and we shall collect any relevant 5000 series products in its original packaging and will credit customers seeking to return such product with the purchase price with no restocking charge, regardless of when the product was supplied to the customer.

As a business, our focus has always been to supply safe insulation products to make better buildings. We believe that taking the time to understand and respond to the test results is in line with these values."

1 The 5000 ranges not affected are Celotex FI5000 and Celotex GD5000, which are not marketed or sold by reference to Class 0. 
2 As defined in Approved Document B (Building Regulations 2010, Fire Safety, Approved Document B (2006 Edition)). Part 6 relates to flame propagation and Part 7 relates to spread of flame.
3 As further described in the Rainscreen Cladding Compliance Guide on our website. 
BS 8414-1

Link:- https://www.celotex.co.uk/5000-test

The class 1 standard allows it to be suitable for buildings up to 18 height where no building is within 1m of the boundary in the conditions set out in Part B2 building regulations. However from a designer point of view and with tightening fire regulations especially on schools the new EFSA FOS July 2017+ is now asking for all external school walls to be of class 0 through out (i.e. all components) which has resulted in us changing specification and temporarily boycotting Cellotex for the moment.

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