Appropriate Overhang Calculation
Adequate overhang is very critical to the life and performance of a wood stile and rail door. A proper overhang will help protect your door from the elements and extend the life of the door. In most climate conditions the following formula can be used to determine the appropriate amount of overhang: X=1/2Y (where X is the length of the overhang required and Y is the distance from the bottom of the door to the base of the overhang.) For example, if the measurement from the bottom of the door to the base of the overhang is 8 feet, then the required overhang is 4 feet. For more severe climates, very wet or dry areas, the following formula should be used: X=Y.
Climate & Exposure
What direction does my door face, N, S, E, W? A Southern exposure can take a toll on wood exterior doors because they are exposed to sunlight most of the day. Use this handy guide that factors your local climate and the direction your door faces to suggest the right dimensions for your overhang (pictured right).
DIRECTION YOUR DOOR FACES
| Climate | North | South | East | West |
|---|---|---|---|---|
| Desert | X=1/2Y | Not Recommended | X=1/2Y | Not Recommended |
| Ocean | X=1/2Y | X=Y | X=1/2Y | X=Y |
| Wet | X=Y | X=Y | X=Y | X=Y |
| Mild | X=1/2Y | X=Y | X=1/2Y | X=Y |