NOVELTY - Structure for installing photovoltaic panels on the roofs or walls of buildings with air cooling and coverage provided by the structure, comprises metal base profiles (1) (b2) fixing to the roof, perpendicular to ridge and/or eaves lines, parallel to one another and e.g. to support with gaskets, coplanar photovoltaic panels connected sealingly to one another by joining means and fixed on the base profiles (b2) using metal covering profiles and with other relative gaskets, interposed to form a waterproof and windproof cover.    USE - The structure is useful for installing photovoltaic panels on the roofs or walls of buildings with air cooling and coverage.    ADVANTAGE - The structure: allows the recovery of slight errors in laying of the photovoltaic panels and relative support means (claimed); allows recovery of thermal energy; and provides photovoltaic panel support in a condition of substantial coplanarity, with the possibility of accurately adjusting the flatness of the structure, both parallel and perpendicular to the direction of the ridge and with high resistance to the bending and torsional stress of the continuous profiles perpendicular to the ridge which compose the supporting structure.    DETAILED DESCRIPTION - Structure for installing photovoltaic panels on the roofs or walls of buildings with air cooling and coverage provided by the structure, comprises metal base profiles (1) (b2) fixing to the roof, perpendicular to ridge and/or eaves lines, parallel to one another and e.g. to support with gaskets, coplanar photovoltaic panels connected sealingly to one another by joining means and fixed on the base profiles (b2) using metal covering profiles and with other relative gaskets, interposed to form a waterproof and windproof cover and of the type in which below the photovoltaic panels and between pairs of supporting metal profiles (b3), cooling or aeration chambers are provided with the lower end open at the level of the eaves line of the roof, for inlet of the atmospheric air, and with the upper end open below, a ridge or chimney cover (24) of the roof ridge, so that the heat produced by the solar radiation on the photovoltaic panels can be removed by the flow of air in which a natural or forced manner crosses the aeration chambers and is discharged in the chimney cover of the roof ridge. The profiles supporting the photovoltaic panels comprise base profiles (b2) made of extruded aluminum, designed for fixing at the bottom cross members (2) which, with their ends, project on either side of the profiles and which with the same ends are fixed with adjustable height positioning, using nuts, on stud bolts (3) secured in a way to a pitch of the roof, so that the base profiles (b2) can form a supporting frame. Both the longitudinal and transverse flatness are possible to accurately adjust, also in the presence of significant imperfections in the pitch below, and to create below the photovoltaic panels, an empty space with the height necessary each time for the formation of the aeration chamber and to position below this and on the pitch at least one layer of thermal insulation panels for the thermal insulation of the pitch necessary each time. It is envisaged that at least a part of the cross members can rest or if necessary be anchored, directly or indirectly, on the thermal insulation panels below, to improve the load-bearing characteristics of the structure.    DESCRIPTION OF DRAWING(S) - The figure shows a lateral and perspective view of one of the pairs of longitudinal profiles which usually sustain photovoltaic panels on their opposite sides but which in this case sustain photovoltaic panels on one side only.    Metal base profiles (1, 9)    Cross members (2)    Stud bolts (3)    Ridge or chimney cover (24)    Vertical plates or parallel plates (227)