Patio awning is set at an angle that is determined by the front profile and the amount of mounting space available. The angle ast which the patio awning is set can be as shallow as 5 degrees. Some can be set at an angle as high as 38 degrees also. It all comes down to preference. However, you should know that a high degree of installation combined with a low front profile helps to optimally maximize the degree of sun protection provided by the awning.For details visit: https://www.residencestyle.com/patio-awnings-your-shade-solution/