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220 Roof Vaults

May be part of Roof Garden (118), Floor-Ceiling Vaults (219), Sheltering Roof (117).

Conflict

What is the best shape for a roof?

Resolution

Build the roof vault either as cylindrical barrel vault, or like a pitched roof with a slight convex curve in each of the two sloping sides. Put in undulations along the vault to make the shell more effective. the curvature of the main shell, and of the undulations, can vary with the span; the bigger the space, the deeper the curvature and undulations need to be.

May contain Dormer Windows (231), Roof Caps (232), Lapped Outside Walls (234).