Definition:
A "French roof" is a type of roof design known as a mansard roof. It has two slopes on each side, with the lower slope being steeper and nearly vertical (almost straight up and down). This design allows for more space in the upper part of a building, which can be used for living areas or storage.
A "French roof" is a specific architectural style that features a double-sloped design with a steep lower slope, allowing for more space under the roof.