The Mansard roof is named for Francois Mansart, a 17th century French architect and the “Father of French Classical Architecture.”
Did You Know: Roof pitch and roof span are not the same thing.
Pitch is the measurement of the rise of the roof to the span of the roof and is expressed as a fraction (2/12).
Slope is the measurement of the rise of the roof to the run of the roof and is expressed as inches per foot in a ratio format (4:24).
Also called a “French roof,” this four-sided roof has a double slope on each side. The slopes meet to form a low-pitch. Its sides can be flat or curved. The top of a mansard roof is typically broad and flat, and its lower pitch is available in three silhouettes:
- Convex (outwardly curved, in an “S” or bell shape)
- Concave (inwardly curved or flared)
- Steeply angled
The pitch of a Mansard Roof is typically about 21:12. Because of its very steep slope, a Mansard roof usually requires additional fastening methods reserved specifically for steep-sloped roofing materials.
You may hear contractors refer to any roof with a very steep slope as a Mansard roof, but the term “Mansard” simply describes a particular type of architecture.
Commercial Mansard roofs require one of several types of materials made specifically for steep-sloped roofs. The most common of these are:
- Asphalt shingles
- Wood shake
- Wood shingle
- Clay tile
- Concrete tile
- Metal shingles
- Metal panel
We are also experts in metal roofing, architectural shingles, asphalt shingles, slate, Tile, Flat, Gable, Hip and Shed/Garage roofs.
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