How To Measure An Inside Prehung Door?

To replace an interior pre-hung door, it is crucial to have accurate measurements. To do this, follow these steps provided by JELD-WEN experts. To measure for a prehung door, you need to know the size of the door, the jamb width, and the rough opening measurements. For old doors, measure the height and width of the door using a measuring tool. For new construction, skip to Step 6. If replacing an existing door, remove the casing or trim.

Before buying a prehung door, measure the rough opening accurately. Prehung doors are designed to fit rough openings 2 to 2 1/2 inches bigger than the corresponding dimensions of the jamb. To ensure a proper fit, measure the thickness of your door slab and the jamb’s thickness from end to end. Replacing an interior door can improve the look and functionality of your space, and even increase your property value.

To measure the door jamb width, measure from the backside of the trim to the backside of the interior trim. The most common way to measure a prehung door is to call out the measurements of the door slab only (translated into lineal feet). Measure the rough opening height, from the finished floor or carpet up to the bottom of the header framing, three times. Standard practice for rough openings is 2″ wider and 2″ taller than the door size, but you can get away with much less.

In conclusion, accurate measurements are crucial for replacing an interior pre-hung door.