Steam_in_Bulgaria Pleven roundhouse_5. From the condition of the roof timbers and many gaps in the tiling, Pleven engine shed is living on borrowed time. But before it can be demolished, look at the ceiling lining panels: asbestos! Much expensive, specialist clearance work will be required to safely remove the carcinogenic material, even if the building is left to fall down of its own accord! 2 October 2016 Roger Griffiths. roger.griffiths@hotmail.com