Smallest Egress Window Size

What is the minimum size for egress windows.

Smallest egress window size.

The egress window must have a glass area of not less than 8 of the total floor area of room s for which it is servicing to allow the minimum amount of sufficient natural light. The nbcc details specific size requirements as. The clear opening of the egress window is designed for access out of the house in an emergency situation. For replacement windows a minimum opening size of 5 0 square feet must be met.

Casement windows with hinged sashes that swing free and clear of the opening can be relatively small and still meet egress requirements. The minimum height requirement of the opening is 24 inches. Reliabilt 105 series 35 5 in x 59 5 in vinyl egress new construction white single hung window. The minimum opening area of the egress window is 5 7 square feet.

The window s sill must not be highers than 44 inches from 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. Let s have a look at the alberta building code abc 2014 criteria that all egress windows must satisfy. Window wells greater than 44 inches in depth requires a permanently fixed ladder or steps to provide access.

It must be at least 5 7 square feet that is at least 20 inches wide by 24 inches high with an opening no higher than 44 inches from the floor. Casement windows are minimally 2 4 wide by 3 4 high. Interestingly enough when 20 width and 24 height is converted into a square foot opening size these minimum opening dimensions together do not meet the minimum 5 0 or 5 7 square feet for egress for small windows sizes. Also remember that the sill can t be more than 44 above the floor so you may end up with a taller window for a head height over 6 8.

This makes them ideal for basement egress and for other areas where space is limited. The minimum egress window opening is 20 wide. The minimum egress window opening height is 24 high. Ringer windows casement window systems.

For many casement windows you ll need to order egress hardware which allows the window to not only swing open but also swing away. Unobstructed opening of not less than 0 35 m2 3 77 sq ft in area with no dimension less than 380 mm 15 inches this window should maintain the required opening during an emergency without the need for additional support. The overall size of this smallest egress casement window is 8 sq.