Proper awning proportions affect both appearance and performance. These general guidelines help balance shade, light, and visual harmony.
Height Coverage
A classic proportion places the awning from the top of the window down to about 1/3–1/2 of the window height. Covering less keeps the façade visually lighter; covering up to half improves sun protection.
Example: for a 60-inch tall window, the awning drop is typically 20–30 inches.
Projection (Depth from Wall)
A useful rule is: projection ≈ awning height.
16–24 inches provides basic rain protection, while 28–36 inches offers more effective shading. Without support posts, projections usually stay within 40–48 inches for structural safety.
Slope Angle
Typical pitch ranges from 5° to 30°, depending on fabric and frame. A steeper angle improves water and snow runoff.
Width
Awnings are often 1–12 inches wider than the window on each side. When covering multiple windows, visual separation between awnings can make the façade look more balanced.
Sun Orientation
South-facing windows benefit from deeper and slightly lower awnings for stronger shade. North-facing sides can use lighter, higher designs. East and west exposures depend on when direct sun is strongest.
Ordering Tips
Decide what matters most — shade, daylight, or aesthetics. Consider the building style: slightly smaller, well-proportioned awnings often look more refined than oversized ones.