Abstract: A solar energy collecting roof having metal roof units capable of heat insulation and joint members joining the metal roof units includes cover glass frames successively inserted between each adjacent pair of joint members from the eaves side to the ridge side to fit in the adjacent joint members, each cover glass frame being formed of frame members having specific sectional shapes and at least one sheet of glass framed thereby.

Abstract: A metal roof unit including a backing, a heat insulating material, and a surface metal plate, which can be produced by roll forming, press forming or extrusion forming on a mass-production basis in factories and can be used for roofing without special skill by expert roofers. In order to unite the metal roof units there are provided joint members which can be produced of light metal such as aluminum by roll forming, press forming or extrusion forming. The joint members are provided with a series of slits from which nails are driven through notches provided at each ends of said metal roof units into a rafter which is provided under said metal roof units, and said slits and notches have sufficient allowance in order to make the joint members and metal roof units movable by heat expansion due to sun heat.