Fabl. Design
Roofing / Double-pitched roof

Mansard

/ˈmæn.sɑːrd/noun

Named after French architect François Mansart (1598–1666).

Definition

A four-sided roof with two slopes on each side: a steep, often dormered lower slope and a shallow upper slope, creating usable attic rooms.

Steep lower slopeShallow upper slopeDormer
Fig. 60 — Mansard: schematic studyNOT TO SCALE
Illustrative photograph of mansard
Illustrative study — Mansard · AI-generatedSAMPLE IMAGE
Photo study — Mansard · AI-generated00:06

Structural & construction notes

The break between pitches needs careful flashing and framing. Mansards were popular in Paris, where they added habitable floors within height rules.

Frequently Asked Questions

An educational reference. Project-specific design requires professional guidance.