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NYC Building Code

§ 1203.2.1 — § 1203.2.1

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What is NYC BC § 1203.2.1?

Quick Answer

This section mandates that exterior openings into attic spaces of buildings intended for human occupancy be protected to prevent the entry of various animals. It specifies requirements for ventilation openings and screening materials. Applies to building owners with attics in occupied structures.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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1203.2.1 Openings into attic.

BC § 1203.2.1

Exterior openings into the attic space of any building intended for human occupancy shall be protected to prevent the entry of birds, squirrels, rodents, snakes and other similar creatures. Openings for ventilation having a least dimension of not less than 1/16 inch (1.6 mm) and not more than 1/4 inch (6.4 mm) shall be permitted. Openings for ventilation having a least dimension larger than 1/4 inch (6.4 mm) shall be provided with corrosion-resistant wire cloth screening, hardware cloth, perforated vinyl or similar material with openings having a least dimension of not less than 1/16 inch (1.6 mm) and not more than 1/4 inch (6.4 mm). Where combustion air is obtained from an attic area, it shall be in accordance with Chapter 7 of the New York City Mechanical Code.

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