Sun Angle Roof Overhang

Using the calculator i m going to shoot for southern windows that are 4 tall and 2 below the lowest part of a 2 overhang.

Sun angle roof overhang.

You can use the free software sketchup to draw the house and it will draw sun shadows for any date time at your location. For example if the roof s overhang does not shade the window during the hottest hours of the day direct and reflected sun light will heat the interior. 24 dec 2012 02 45 pm. Some shutters eaves trellises light shelves and awnings serve the same purpose as an overhang.

Use the june 21 sun angle and locate the overhang shadow line at the window sill. I used sketchup to help determine how the solar path would fall on the house i am designing. How do i determine the correct amount of shading sun. Az el both report dark after astronomical twilight.

Also the time zones are not explained and one would think could be automatically. The size of the window width and height and the window s relationship to the roof the space above the window influences the direct and indirect gain of solar heat. Overhangs are a key part of any home s design. Roof overhangs for summer shade and moisture protection.

At noon on january 21 the glass is completely exposed. From november through februrary the southern windows will receive full sun. 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. 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.

Elevation is measured in degrees up from the horizon. Jonr senior member posts 5341. This will give me complete shade from may to august 24 shading in march 41 in september and less than 10 shading in october. Types of roof or window overhangs for sunlight solar gain control overhangs may be solid louvered vegetation supporting or a combination of all of these aspects.

Borst engineering construction llc competence integrity and professionalism are integral to all that we do. Azimuth is measured in degrees clockwise from north. Use the march 21 sun angle and locate the shadow. Cosine of solar zenith angle.

Do not undervalue their importance. Purpose of use calculating soffit overhang to maximize passive solar house design bug report the time portion is confusing as when i enter 12. In short that means that the roof overhang should be of sufficient dimensions to optimize the amount of shade during the warm summer months but not be so large that they do not allow full sun exposure during the cold winter months.