Minutes later, they were on the flat roof of the power plant.
It was a large building with a high flat roof.
It is a one story building with a flat roof.
It was built in the 1940s, and is a two story building with a flat roof.
The open window looked out over the flat roofs of the city and the lake beyond.
I can't think what building it is then, if it's got a flat roof.
Right there, in the flat roof, was an access door.
The flat roof was a special feature of this building.
Below me I could see only the flat roofs of the two houses.
You can also use this treatment on flat roofs which are in poor condition.