Awning Window Height From Floor

Maximum sill height above floor.

Awning window height from floor.

The bottom height or sill of the window can vary within a room without affecting its visual appeal but the head heights must be uniform especially in the corners. Minimum net clear opening. But if nothing is in front of the window lowering the sill will increase ventilation the more operable glass the greater the air flow and allow you to bring in. If you are installing windows within 2 feet of a door and lower than 5 feet from the ground you need tempered glass in the windows even though these might be higher than 18 inches from the ground.

Minimum width of opening. Similarly many windows can be set lower than the common height of 3 feet above the floor. This translates to 6 foot 8 inches off the floor when you have an 8 foot high ceiling or 8 feet off the floor for a 9 or 10 foot ceiling. For example a window that measures 60 in height would have an awning that has a 30 projection.

Minimum height of opening. A standard projection b would be approximately half the height of your window. 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. Refer to the drawing.

You can choose either projection this will change the height of the awning and how far it projects out from the wall. Traditionally that height was meant to allow the placement of furniture under the sill. The short answer is awning windows can be used for egress but there is a longer answer.