Disclosed is a roof spoiler that effectively disrupts the attached flow of wind upon a roof surface. This spoiler has a stowed position, whereby it is almost completely out of the view of passersby. It also has a deployed position, wherein a barrier is projected vertically, or substantially vertically, so as to disrupt the flow of air over the roof surface. This spoiler utilizes a hinged design to move between these two positions. The spoiler is specially designed to operate in conjunction with a gutter mounted along the leading edge of the roof. In the stowed position, a portion of the spoiler covers the open gutter. In one embodiment, the spoiler is L-shaped to facilitate its stability in the deployed position.