Exterior, House Building Type, and Green Roof Material A green roof also helps makes up for lost garden beds, while creating attractive, leafy views from the second and third floors. In summer, when the sliding doors are left wide open, indoor and outdoor spaces blend together.  Photo 3 of 25 in 25 Green Roofs That Bring Spectacular Homes to New Levels

25 Green Roofs That Bring Spectacular Homes to New Levels

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When architect Paul Bernier and lawyer Joëlle Thibault sought to expand their home in the Plateau Mont-Royal neighborhood of Montreal, they designed two additions: a new office on the top level and a backyard playroom with a green roof. The single-story addition to the row house adds square footage without eating up too much outdoor space. The green roof also helps makes up for lost garden beds, while creating attractive, leafy views from the second and third floors.