The Ontario Building Code | Drips Beneath Window Sills
18.104.22.168. Drips Beneath window Sills
(1) Except for wall openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings located less than 150 mm above ground level, where a concealed flashing is not installed beneath window and door sills, such sills shall be provided with an outward slope and a drip located not less than 25 mm from the wall surface.
9.20.14. Protection During Work