Abstract: A roof structure for enclosures for swimming pools, spas, or patios and the like includes a plurality of laterally spaced angled roof beams each having a plurality of vertically spaced tracks on facing sides of adjacent beams for sliding receipt of one roof panel in each opposed set of tracks. The trailing ends of each higher panel is releasably latched to the leading end of each succeeding lower panel within their respective tracks, whereby the succeeding lower panels can be successively used to push or pull the preceding higher panels by hand along their respective tracks during assembly and removal of the panels from the roof structure.