Mansard Roof Construction Details

Lap the roof underlay over the mansard underlay by minmum 150mm.

Mansard roof construction details.

A mansard roof also known as a french or curb roof is a roof characterised by that fact that each of its four sides has two pitches the lower pitches being steeper than the upper pitches. It depends upon what type of design customer wants to implement. The mansard is particularly well suited to renovation work on pitched roof houses because the upper story can be enlarged without adding extra height to the structure. It is similar to a gambrel roof but differs in that it displays the same profile on all sides whereas a gambrel roof has vertical gables at either end.

Mansard roofs are for the most part based on standing seam or batten seam construction. Mansard is a four sided roof with double slopes on each side so its sides can either be curved or flat. The lower ends of the pans are typically hooked over an edge strip to form a drip. Mansard roof with mansard tiles ensure that a clear ventilation path is maintained from eaves to ridge where insulation is positioned between the rafters.

There is a sort of visible distinction between flat roofs and mansard roofs. If you are not familiar with a gambrel roof then let us first explain its architecture in brief. Simply put the mansard roof also known as the french roof or curb roof is a hybrid between a gambrel roof and a hip roof. But you cannot misunderstand them as straight panel roofs.

The low downward slope of the mansard roof line acts visually to reduce the scale of a building and helps to eliminate a boxy appearance.