Standard Exterior Door Sizes Rough Opening at Exterior

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Standard Exterior Door Sizes Rough Opening. The general rule of thumb being the roughopening for a normal interior or exterior dooris two inches wider than the stated door size. Standard thickness for an interior door is 1 3/8, if your door exceeds 36” or is over.

Closet Bifold Door Rough Opening Prehung interior doors
Closet Bifold Door Rough Opening Prehung interior doors from www.pinterest.com

To calculate clear opening, 60mm can be deducted from the door size to take. For exterior doors, the rough door opening is usually 2 inches wider and 2 1/2 inches taller than the door panel. What is the rough opening size for an exterior door?

Closet Bifold Door Rough Opening Prehung interior doors

What kind of opening usually, the rough opening for a garage door is 3 inches wider than the finish door is. Rough opening height size = nominal door height (80 inches) + 2 1/8 inches (or + 2 7/8 inches if using brick mold). Always remember to square up your door before you nail the frame in place to assure it will close properly. Standard thickness for an interior door is 1 3/8, if your door exceeds 36” or is over.