Posted By David Bannister Hi Gavin, as you rightly say the consequences of aerosols containing flammable liquids with flammable solvent being involved in a fire are very severe. I can recall attending a seminar organised by a well-known manufacturer of hair lacquer at which the effectiveness of various sprinkler configurations was being assessed. The fireballs in each case coupled with the rocket propelled fire-bombs was entertaining and spectacular, but ultimately frightening when we realised the quantities of water that were required to even start to make any difference! I say this to prompt you to revisit your fire risk assessment. Whilst the probability of a fire starting in your aerosol storage area may be low, what about a spreading fire, racking collapse, lighting collapse? The severity of the resulting fire will be very high and it is doubtful whether the fire service would attempt to do anything more (quite correctly in my opinion) than watch it burn from a great distance. Secondly, I am almost certain that your property insurers would require you to provide a substantial barrier to prevent the rocketing of the aerosols and reduce the quantities to the lowest level they can. They are also likely to want an emergency plan to be in place on the detection of a leaker. Finally, I believe that the British Aerosol Manufacturers Association (http://www.bama.co.uk/) has good advice available. If all else fails, RLF (work it out) Good luck David