Building and Carpentry
Interior Design

What is the rough opening requirement for an interior door that is 3 foot with a frame size of 3 foot 1-58?



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The rough opening of an interior door is two inches wider than the width of the door and two inches higher than its height. Thus your rough opening width is 38". A typical interior door has a height of 80" which would require a rough opening height of 82" but check your door to ensure that is theheight.