• LinkedIn
  • Pinterest
  • Twitter

The EWS1 Form and Limited Combustibility

The EWS1 form does seem to have lots of notes to refer to and some of them lead you to sources of reference.


For limited combustibility, for example under Option A you are referred to Note 6.

Note 6 states:

‘Note 6 – The term ‘limited combustibility’ is as defined in BS9991:2015’.

Now refer to BS9991:2015 Fire Safety in the Design, Management and Use of Residential Buildings – Code of practice.

If you don’t have a copy BS9991: 2015 defines material under limited combustibility under section 3.45 and states:

‘material of limited combustibility


a) a non-combustible material; or

b) any material of density 300 kg/m3 or more which, when tested in

accordance with BS 476-11, does not flame and the rise in temperature on

the furnace thermocouple is not more than 20 °C; or

c) any material with a non-combustible core of 8 mm thick or more, having

combustible facings (on one or both sides) not more than 0.5 mm thick; or

d) material classified as class A2-s3, d2 in accordance with BS EN 13501-1, when tested in accordance with BS EN ISO 1182 or BS EN ISO 1716 and BS EN 13823’


Download a copy of the EWS1 form

Latest News

  • PAS2035:2019 and Collaboration with Diamond and Co for Retrofit

    Now that I am registered with Elmhurst Energy as a Retrofit Coordinator following successful training with the Retrofit Academy I am collaborating with Diamond & Co Diamond & Co in Scotland to provide a full end-to-end retrofit service.


  • Why Not Review Review your Scheme for EWS1 Prior to Completion?

    If you're the developer of an apartment block (or blocks) employing another consultant to review the external walls of the development either during construction or even at design stage maybe isn't something you have thought about.

    Why would you?

  • So How Do I know if my Building is 18m High or Not?


    This may seem a strange question to ask but not when it comes to measuring the height of the buildings in relation to the recent Advice Notes issued by the Ministry of Housing Communities and Local Government(MHCLG) following the establishment of the Independent Expert Advisory Panel (the Expert Panel).

    In my article published in the April 2021 edition of The Expert Witness Journal I review some anomalies.