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Minnesota Department of Labor and Industry

Opinion: Sleeping room window sash replacements




Sleeping room window sash replacements


1994 UBC Sections 310.4 and 3402

Submitted By:

MN B. O. Uniformity Committee

Approved By:

Thomas R. Joachim, State Building Official

Issue Date:

July, 18 1997


What minimum net clear opening dimensions and sill mounting height are required after replacing the window sashes with either a pocket unit (sashes and new jambs) or new sash and jamb liners?


As this work is considered maintenance, the remodeled windows need only comply with any code provisions in effect when they were originally installed.

Committee comments:

Although sash replacement normally reduces the openable area in some cases up to an inch on all sides, this work is still considered maintenance and does not generally diminish any life safety. The reliability afforded by new sash and jambs should be considered as offsetting any minor reduction in openable area because of new jamb liners.

Adopted by Committee September 25, 1996 and ratified at the 41st Annual Institute of Building Officials on January 17, 1997.

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