An A-frame home includes interconnected roof panels. The joint connection is at the apex of the abutting upper panel edges which includes abutting vertically disposed surfaces. Aligned horizontal slots are formed in the vertical surfaces and connect with enlarged cavities. The slots and cavities form an I-shaped passageway. An I-shaped connecting element is slidably positioned in the I-shaped passageway for locking the panels together. The upper edges of the panels are horizontal and flat while the top portion of the vertical abutting faces are slightly spaced apart to receive a rib extending downwardly from a cap. The rib includes laterally extending teeth for gripping the adjacent groove surfaces. A pair of shoulders oppositely disposed relatively to the rib extend downwardly from the cap for engagement with the top horizontal surface of the panels and downwardly extending flanges are provided on the outer edges of the cap wings and the flanges extend downwardly along the outer panel surfaces.