III. Structural Problems and Strengthening Methods I. Vulnerable Windows

Large windows, glass doors, and skylights need to be braced by solid wall or roof areas. Without adequate bracing, the movement of the house in an earthquake may shatter windows and skylights. Tempered or wired glass, or a layer of shatter-resistant film, can keep the glass from breaking into shards.

Typical Cost: $4/sf of film installed on glass

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