Clear openable area no less than 0 33m.
Egress window dimensions uk.
To meet egress a window must comply with all four irc requirements.
Clear opening width 20.
Means of escape requirements.
Irc codes for egress.
Note that a window opening that s the bare minimum of 24 in.
Clear opening width 20 clear opening height 24 minimum clear opening sq ft 5 7 sq ft.
Window wells greater than 44 inches in depth requires a permanently fixed ladder or steps to provide access.
The international residential code irc requires a minimum opening of 5 7 square feet for egress windows.
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.
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.
Does not apply in all jurisdictions.
A window has to be taller and or wider than these minimums to meet the 5 7 sq ft opening requirement.
Permanent ladder or steps cannot encroach the required window well dimensions by more than 6 inches.
20 20 5 21 21 5 22 22 5 23 23 5 24 24 5 25 25 5 26 26 5 27 27 5.
This would mean that a window width of 20 inches would require a height of 41 inches.
Width and height either of these are not to be any less than 450mm.
The minimum egress window opening height is 24 high.
Casement windows are minimally 2 4 wide by 3 4 high.
The minimum egress window opening is 20 wide.
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.
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.
Wide does not meet egress requirements since its net clear opening is only 3 33 sq.
If you have a window with an open height of 34 then the minimum open width would have to be 24.
High and 20 in.
Maximum sill height above the floor 44 1st floor.
The square footage must be configured with a minimum height of 24 inches and minimum width of 20 inches.
All dwellings and extensions shall have first floor windows suitable for means of escape.
2nd floor and above.
Cill height the bottom of the openable area should be no more than 1100mm above the floor area.
See below for the general criteria for egress windows.
Only one window per room is generally required.
In addition the egress window requirements for basements specifies that they be at least 36 inches in height and width with a fully functioning opening.
For many casement windows you ll need to order egress hardware which allows the window to not only swing open but also swing away.
Height and width requirements in inches to meet the 5 0 sq.
