Ask House Spouse · Doors & Windows · Glass & Screens
How do I fix a sliding glass door that drags or sticks?
Short answer
A sliding door that drags has either worn rollers, a dirty track, or both. Vacuum the track, then check the adjustment screws at the bottom edge of the door — a Phillips turn on each raises the door off the track. If it still drags after adjustment, the rollers themselves are worn and need replacement (a 90-minute job).
Clean before you diagnose
PNW pollen, dust, and pet hair pack into slider tracks and jam the rollers. Vacuum the track thoroughly, then wipe with a damp cloth. Half the "broken" sliders we get called for are just dirty.
Adjust the rollers
Every slider has two adjustment screws at the bottom edge, one at each end. Turn clockwise to raise the door off the track. Small adjustments — quarter turns at a time — until it glides freely and closes level with the frame.
Roller replacement
If it drags after cleaning and adjustment, the roller wheels are worn. Universal roller kits are $15–$35; brand-specific are $40–$120. The door has to come off the track (two-person job, glass is heavy) — this is a handyman task.
What we see on Home Health Assessments
Roughly 66% of homes have at least one exterior door with compromised weatherstripping — a top driver of PNW winter heating loss.
Caught early on assessment: $95–$260 · Left until failure: $200–$900
Based on real experience across Snohomish and King County, doors & windows issues like this are among the ones homeowners most often miss until they become expensive. Our Home Health Assessment catches them early — while they're still a maintenance item, not a repair.
How the Home Health Assessment works