Skylights are typically installed on pitched and flat roofs. All the work must be carried out by professional roofers, with experience in installing skylights.
For tilted roofs Skylights Montreal professionals recommend using 3' membrane to protect wooden decks. Step flashing and decorative flashing must also be used.
The minimum skylight frame height in Montreal is 6". For flat roofs the minimum skylight frame height is 12" (the higher is the better).