Symptoms
- Door doesn't sit flush against the frame anywhere
- Gaps vary in size around the door
- Frame visibly bows when you sight down its length
Likely causes
- CommonMoisture exposure over timeFrames exposed to rain, humidity, or a past leak can warp as the wood absorbs and releases moisture unevenly.
- PossibleOriginal poor-quality or improperly seasoned woodWood that wasn't fully dried before installation can warp as it continues to dry.
- PossibleStructural settling nearbyMovement in the surrounding wall framing can distort the door frame.
- PossibleSun exposure causing uneven expansionOne side of a frame getting more direct sun than the other can warp it over time.
What to do
- Sight down the frame's length from top to bottom on each side to see where the warp is most pronounced.
- Check the door's fit at multiple points and note where the gap is largest or smallest.
- For minor warping, adjust the hinges and strike plate to compensate as much as possible.
- Check for and repair any moisture source nearby, like a leak or poor exterior sealing, to prevent further warping.
- For significant warping that affects the door's function, plan to replace the affected section of frame rather than continuing to compensate.
- Repaint or reseal any exposed or repaired wood to protect against future moisture damage.
Tools and parts
- Level
- Screwdriver
- Flashlight
Replacement door frame kitSearch: “exterior door frame replacement kit”
When to call a pro
Call a carpenter or door installer if the warp is significant, since replacing part or all of a frame usually requires professional tools and experience.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.