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Install Pre-hung Door Frame and Test Operation — Install Door Jamb and Door

Beginner2 mins

Part of project

How to Add a Door to an Under-Stair Closet · Step 4 of 6

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With the opening prepped, install the pre-hung door frame. A helpful trick is to screw pieces of 1x material (wood strips) into the inside of the door jambs where the hinges are located, at both the top and bottom. These holes will later be covered by the interior casing. By having these strips, you can push the door jamb flush against the interior wall, making the door frame align perfectly with the finished wall surface. Secure the door frame using shims and fasteners (nails or screws) to ensure it is plumb, level, and square. After securing, test the door's operation to confirm it opens and closes smoothly, and that the gaps around the door are even and consistent.

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