Thatched roofs are generally legal in the United States, but constructing or maintaining one is exceptionally rare due to strict modern building codes, municipal zoning laws, and stringent fire safety regulations. Most American building authorities require roofing materials to possess high fire-resistance ratings, such as Class A fire classifications, to prevent the rapid spread of structural fires between closely spaced suburban homes. While traditional natural thatch is highly combustible, property owners can sometimes build thatched roofs by utilizing specially treated, fire-retardant synthetic thatch or by installing internal fire-barrier systems that comply with local municipal codes, though securing permit approvals requires navigating extensive regulatory hurdles.
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