Solar Design Roof Overhangs

This beautiful modernist home in sarasota florida uses lumos solar glass on glass solar panels.

Solar design roof overhangs.

With the window heights and overhangs i used in the model at noon on june 21 the entire glazing of the south elevation windows are completely in shadow but just barely. 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. How do i determine the correct amount of shading sun. 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.

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. 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. Here the panels are mounted on a steel structure that integrates the panels seamlessly into the roofline.

Design solar altitude angle for full sun deg from passive solar altitude angle calculator build height of roof overhang from top of glass feet or leave blank build depth of roof overhang from glass feet or leave blank requested solution 0 full shade full sun 1 full shade 2 full sun. Solar overhang with glass on glass panels. At noon on january 21 the glass is completely exposed. I used sketchup to help determine how the solar path would fall on the house i am designing.

How roof overhangs work.