The Ontario Building Code | Sealants, Trim and Flashing
9.7.6.2. Sealants, Trim and Flashing
(1) The sealing compound used to seal the glass component of an insulating glazing unit to the sash component shall be compatible with the sealing compound used to edge seal the glass component.
(2) Flashing used to protect openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings shall conform to Articles 9.27.3.7. and 9.27.3.8.
(3) Sealants shall be applied between window frames or trim and the exterior cladding or masonry in conformance with Subsection 9.27.4.
(4) All unfinished portions of the frame and other components of aluminum windows, doors or skylights in contact with the edges of masonry, concrete, stucco or plaster shall be protected with an alkali-resistant coating.
Section 9.8. Stairs, Ramps, handrails and Guards
9.8.1. application
In Plain Language
Sealants, trim, and flashing around windows, doors, and skylights must be installed to keep water from getting behind the unit and into the wall assembly, a common source of hidden water damage.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.