Minimum Sill Height Above Floor

A minimum opening of 5 7 square feet net clear area.

Minimum sill height above floor. A minimum net clear opening dimension of 20 in width. According to code check complete. The slope of the finished grade must be maintained at a minimum of 6 inches of fall within 10 feet. The windows are installed at the bottom of the windows.

The sills are often attached to 2 by 4 inch blocks that are inserted between the drywall and the wall studs so that there is plenty of mounting material to hold the sills. This residential structure with masonry cladding has landscaping and finished grade around front extending up onto the brick and above the height of the wood sill plate indicated by the orange line at the first exposed mortar joint. The 2012 ibc international building code and the irc international residential code requires the bottom sill of operable windows to be a minimum height above the interior floor when they are 72 inches or more above the grade outside the window. Minimum 24 inches of net clear height opening.

Where to install windows with tempered glass is not just dictated by the height of the window. A finished sill height above the finished floor of 44 or less. An illustrated guide to the building mechanical and electrical codes by redwood kardon et al conditions requiring a window to have tempered glass include a window lower than 18 inches from the ground larger than 9 square feet in area with a top higher than 3. Minimum 20 inches of net clear width opening.

In the 2012 ibc the required height of the window sill to be no more than 36 inches off the floor. Window wells serving an egress window shall not be less than 9 square feet in area with a horizontal length width of no less than 36 inches. Minimum window sill heights the 2018 irc continues to require the bottom of openings created by operable windows to be a minimum height of 24 inches above the adjacent interior floor when they are more than 6 feet above the grade outside the window. A minimum net clear opening dimension of 24 in height.

In occupancy groups r 2 and r 3 one and two family and multiple family dwellings where the opening of the sill portion of an operable window is located more than 72 inches 1829 mm above the finished grade or other surface below the lowest part of the clear opening of the window shall be at a height not less than 36 inches 914 mm above the finished floor surface of the room in which the window is located.