"Asbestos has not been confirmed at the site" said South Wales Fire & Rescue Service.
"However if asbestos is confirmed, this does not pose a safety risk to the public as heavy rainfall and water from firefighting will prevent the asbestos from spreading"
More top news
A campaign has been launched to free an old seadog trapped in quarantine after his owner died on their yacht.
A teenager indoctrinated with "chilling" extremist views is jailed for three years for plotting to go to Syria to fight for Islamic State.
The summer sunshine of last week may well feel like a long time ago now but the rain is good news for gardens everywhere, if nothing else!