Vij Randeniya, President of the Chief Fire Officers Association said the fire earlier this month at the Jayplas plant in Smethwick occurred because recycling waste was collected in "one great massive lump."
Today firefighters are appealing for recycling plant waste to be stored safely so that a major fire does not occur again.
Damage from the recycling plant fire melted lamp posts and destroyed thousands of tonnes of rubbish causing £6 million of damage.
Northamptonshire's Arson Task Force is warning local residents about floating lanterns following the fire at a Smethwick recycling plant.
Around 50,000 tonnes of plastic recycling material and a factory is on fire in Smethwick.