Waste Recycling Group (WRG) has suffered two fires in one week at its waste transfer stations in East Anglia.
Last week a blaze tore through the waste management firm's £2 million site in Haverhill, Suffolk.
Two days later 80 tonnes of waste went up in smoke at its Hadenham Road transfer station in Lowestoft, Norfolk.
WRG external affairs manager Mike Snell said that none of the incinerated waste was material collected for recycling.
He added: "The fire was contained within the brick walls of the building, so the damage was only cosmetic, caused by the smoke. However, it was quite extensive."
In Haverhill too, the destruction was limited to smoke damage and destroyed paintwork.
Snell said that neither of the fires impacted on their customers, as both sites were fully operational the following day.
He added that the cost of the damage was unlikely to be substantial.
Suffolk and Norfolk Fire services are investigating the causes of the blazes, which have yet to be determined.
An Environment Agency spokesman said: "We have no cause for concern as the fires were contained within the sites and there was no environmental pollution."
No one was hurt.