What does "french roof" mean?

A modified form of mansard roof having a nearly flat deck for the upper slope.

What is a synonym for "french roof"?

Common synonyms include: mansards, roof.

noun

noun ·Rare ·Advanced level

Noun

1
A modified form of mansard roof having a nearly flat deck for the upper slope.
2
a mansard roof with sides that are nearly perpendicular wordnet

The earliest known examples are from France.