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Sagging or Warped Garage Door
in Overland Park, KS
A sagging garage door is more than a cosmetic problem. When a door bows in the middle, the top and bottom sections no longer close flush, which means the weatherstripping stops working and the opener works harder than it should. In Overland Park, summer humidity regularly stays above 70 percent for weeks, and that moisture warps wood doors and causes older steel doors to lose their shape at the panel seams. Left alone, a warped door can pull the tracks out of alignment.
Quick Answer
Garage doors sag or warp when the panel sections lose their structural shape, usually from moisture damage or a broken tension spring cable. Wood and older steel doors in Overland Park are especially prone to warping because summer humidity here regularly tops 70 percent for weeks at a time. The fix depends on how far gone the door is. Some sagging can be corrected with strut bracing. Heavily warped doors usually need replacement. Call (913) 901-9954 to find out which situation you are in.
Telltale Signs
Warning Signs to Watch For
- The middle of the door bows outward or inward when the door is closed
- There is a noticeable gap between panels along the horizontal seam in the middle of the door
- The door drags on one side of the opening when moving up or down
- The bottom edge of the door does not make even contact with the floor seal across the full width
- Wood panels show swelling, paint bubbling, or splitting at the edges
- The opener strains or the motor sounds louder than normal on every cycle
Root Causes
What Causes Sagging or Warped Garage Door?
Moisture Damage on Wood or Older Steel Doors
Overland Park summers bring high humidity for months, and garages that face north or east often stay damp well into the afternoon. Wood door panels absorb that moisture unevenly, causing the face of the panel to expand while the back stays drier. That difference in expansion bows the panel outward.
The Fix
Horizontal Strut Installation or Door Replacement
A horizontal strut is a steel brace that bolts across the back of a panel to hold it flat. It works on panels that are only beginning to bow. Panels that have already split or are badly warped need to be replaced because a strut won't pull cracked wood back into shape.
Broken or Stretched Tension Cable
On either side of the door, a cable runs from the bottom bracket up through the spring system to carry the door's weight evenly. When one cable frays or breaks, the other side carries more load and the door tilts and eventually sags on the lighter side. This problem appears more on doors that are 20 or more years old.
The Fix
Cable Replacement
Both cables are usually replaced at the same time because if one has failed, the other is likely close behind. The spring tension is also checked and adjusted during this repair since the two systems work together.
Self-Diagnosis
Which Cause Applies to You?
Check the signs you're observing to narrow down the likely root cause before your inspection.
| What You're Seeing | Moisture Damage on Wood or Older Steel Doors | Broken or Stretched Tension Cable |
|---|---|---|
| Door bows outward from the center and worse in humid months | ||
| Door sags noticeably lower on one side than the other | ||
| Wood panels show paint bubbling or swelling along the edges | ||
| Cable on one side of the door is slack or coiled at the bottom bracket | ||
| Gap between middle panel sections visible when door is closed |
Free Inspection
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An on-site inspection is the only way to confirm which cause applies to your property. Free, no obligation.
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