A roof is the structure to the top part of a building, it protects the building against the effects of weather.
A mansard roof is a roof having on each side a steeper lower part and a shallower upper part.
A roof is the structure to the top part of a building, it protects the building against the effects of weather.
A mansard roof is a roof having on each side a steeper lower part and a shallower upper part.