Roof-in mounting

By the mounting of solar modules on roofs there are two different systems, roof-top and roof-in mounting. Modules integrated into the roof looks like an esthetic / optical advantage against standard roof -top mountings, however the installation costs are higher and should be already planed into costs with the building of houses. The efficiency of these solar modules is smaller, for lack of backing ventilation, and if not correct consideration become with the building of houses estimated on approximately -5%.