Abstract: In a sectional overhead garage door assembly, the problem of opening the garage door for aeration or else, while preventing small animals to enter, is solved by i) making the last and the next to last panels of the door detachable so that the last panel may remain on the ground, ii) by providing the last panel with at least one first attachment, and iii) by mounting a screen to one of a) the frame of the door and b) the next to last panel, so as to be deployable in front of the opening when the last panel is detached and the other panels are raised. The deployable screen has at least one second attachment for cooperating with the at least one first attachment for removably attaching the deployable screen to the last panel.