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.