The Montreal Urban Ecology Centre has published many documents on green roofs since 2009 ans is still the reference for information about green roofs in Quebec.
One of them is ‘Toitures végétales en milieu institutionnel: Étude de cas UQAM’ (Green roofs in institutional context: UQAM case study, written by one of the founder of The Green Line: Green Roof and published in 2008. In addition of the case study, you can find the most up-to-date information on green roof systems in Quebec, the advantages and the elements to plan before starting your green roof project.
The paper version can be bought directly at the Montreal Urban Ecology Centre for 40$ (20$ for students) and the profits will help funding this non-profit organism projects. You can also download the electronic version for free on their website.