Exterior Door Sizes Chart. Examples of an exterior door include an entry door back door garage entry door. Earlier homes used homes with a 4 thick wall-these had metal siding 38 thick.
For the 36 x 80 exterior doors this rough opening will need to be 38 ΒΌ inches by 82 18 inches. AKA a 29 door. By IRC building codes exterior doors are required to be a minimum height of 80 inches.
Its always best to verify the recommended RO from the manufacturer.
Framing rough opening sizes are really quite simple. With every commercial property there are numerous interior and exterior doors and the majority of these doors must be built to the proper size. Metric door sizes mm Imperial door sizes inches Imperial door sizes ft and inches. Examples of an exterior door include an entry door back door garage entry door.