Code of Massachusetts Regulations
105 CMR - DEPARTMENT OF PUBLIC HEALTH
Title 105 CMR 410.000 - Minimum Standards of Fitness for Human Habitation, State Sanitary Code, Chapter II
Section 410.530 - Weather-tight Elements

Universal Citation: 105 MA Code of Regs 105.410

Current through Register 1531, September 27, 2024

(A) An exterior openable window shall be considered weathertight only when:

(1) All panes of glass are in place, unbroken and properly sealed;

(2) The window sash opens and closes fully without excessive effort; and

(3) One of the following conditions is met:
(a) The window sash is sufficiently well-fitted such that it minimizes the infiltration of air or moisture and the space between the window sash and the prime window frame is no larger than 1/8 inch at any point on the perimeter of the sash in the case of double hung windows and 1/16 inch in the case of casement windows; or

(b) A storm window is affixed to the prime window frame in such a way as to minimize the infiltration of air or moisture.

(B) A door leading from a residence or dwelling unit to the exterior shall be considered to be weathertight only if:

(1) All panes of glass are in place, unbroken and properly sealed;

(2) The door opens and closes fully without excessive effort; and

(3) One of the following conditions is met:
(a) The door is sufficiently well-fitted so that it minimizes the infiltration of air or moisture and the space between the door and the prime door frame is no larger than 1/8 inch at any point on the sides of the door; or

(b) storm door is affixed to the prime door frame in such a way as to minimize the infiltration of air or moisture.

(C) Building and structural elements shall be considered weather-tight when all cracks and spaces not part of heating, ventilating, or air conditioning systems are sealed to prevent infiltration of exterior air or moisture.

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