The application of solar film on the windows is also effective. A final solution is solar screens for he south and west windows. The critical exposures of a building in the northern hemisphere are those facing south and west. They receive the most direct sunlight in the summer and account for a majority of the building's heating load. Deciduous trees, in addition, will lose their leaves in the winter to expose the building to the warming sunlight.
Landscaping has another benefit.
A portion of the heat striking the lower walls of a building arrives indirectly, reflected from rocks, sidewalks and parking lots or re-radiated from these surfaces. Shrubs, grass and ground cover reduce this heat gain by blocking the heat transfer path or dissipating the thermal flow. Shrubs are quite effective if they shed their leaves in the winter or can be trimmed to open the thermal path to the south and west facing building walls. Get our News about how to Save Energy and Money.