Since the London Grenfell tower block fire disater there has been, quite understandly, a lot of debate about the actual or potential fire hazard of insulation foam in general. We at Isospray have expressed concern to the insulation industry over the last twenty years or so about companies that have been brazingly installing non fire rated insulating foams without a concern about the fire hazard they are causing. Of the course their motivation is simple, non rated foams are of course signicantly cheaper to buy and install and confer a significant competive advanatge in final consumer pricing.