As a home "sits" into its foundation, minor shifts create stress that often releases at the weakest points—the corners of doors and windows.

To install the piece, you'll typically need:

New construction is particularly prone to this. As the green lumber used in the framing dries out over the first year or two, it shrinks. This minor movement often pulls at the drywall, creating thin, straight vertical lines above the header of the door.

Disclaimer: This write-up is for informational purposes only and does not constitute a professional engineering assessment. Always consult a licensed structural engineer or building inspector for definitive diagnosis and repair recommendations.

Vertical cracks above door frames often occur because these areas are natural weak points in a wall's structure.

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vertical crack above door frame

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