Solar Design Roof Overhangs

How roof overhangs work.

Solar design roof overhangs.

In passive solar home design exterior roof overhangs provide a practical method for shading building elements such as windows doors and walls. Overhangs are most effective for south facing elements in the northern hemisphere and at midday. An overhang or some sort of solar control or solar shading is a crucial element in passive solar design because it blocks the sun s heat energy when it is not desired. Overhangs are most effective for south facing elements in the northern hemisphere and at midday.

I used sketchup to help determine how the solar path would fall on the house i am designing. At noon on january 21 the glass is completely exposed. This beautiful modernist home in sarasota florida uses lumos solar glass on glass solar panels. Because the sun travels different paths across the sky in the winter low and summer high time an overhang can be constructed to utilize and manipulate the heat energy from the sun.

Solar overhang with glass on glass panels. The overhang can be a fixture on the outside of the house or it can be a type of shading overhang or some type of control that can be. Here the panels are mounted on a steel structure that integrates the panels seamlessly into the roofline. How do i determine the correct amount of shading sun.

How roof overhangs or other window overhangs work to control heat and solar gain.