January 8, 2019
1205.2 is a non issue because 1205.1 states to either provide natural light per 1205.2 or artificial per 1205.3
1203.4 is a non issue for similar but more lengthy reasons, 1203.1 states natural or artificial ventilation and then goes more at length on the options.
I think the conversation doesn't end here though, as you have to look at Residential occupancy specific egress requirements for the sleeping rooms themselves I believe.
April 1, 2015
1203.4 Natural ventilation. Natural ventilation of an occupied space shall be through windows, doors, louvers or other openings to the outdoors. The operating mechanism for such openings shall be provided with ready access so that the openings are readily controllable by the building occupants.
1205.2 Natural light. The minimum net glazed area shall not be less than 8 percent of the floor area of the room served.
November 8, 2013
I know that in the IRC there are requirements for windows in sleeping rooms. In the IBC 2009, for R-2 occupancy, there are requirements for an egress window, but with an exception for sprinklered buildings. I can't find where there is requirement for a window for light and ventilation purposes. Does anyone have any info on this requirement?
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