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Repairing Crooked Sliding Door Tracks

Follow our detailed guide for quick fixes for your bent sliding door tracks. Learn when to repair and when to replace

by This Old HouseUpdated 09/07/2024
An illustration of a man using a hammer to fix a sliding door track.

Sliding patio doors are popular in many homes because they offer easy access to outdoor spaces and let natural light in. However, over time, the metal tracks that guide these doors can become bent, crooked, or damaged, making it difficult to slide. If your sliding door jumps off its track or moves roughly, it’s time to address the problem. This guide will walk you through repairing crooked sliding door tracks, from identifying the issue to implementing a fix, which is manageable for many homeowners.

Common Issues With Sliding Door Tracks

Sliding door tracks face daily wear and tear that can eventually lead to damage. The metal track along the threshold takes a constant pounding from foot traffic and the door’s movement. This repeated stress can result in bends, bumps, and wrinkles in the track. Common issues include doors that ride roughly, frequently jump off the track, or become difficult to open and close smoothly. 

Tools and Materials for Fixing Sliding Doors

You’ll need the following tools to fix your sliding door track, depending on what methods you choose to use. 

Essential Tools

  • Hammer
  • Wooden block
  • Flathead screwdriver
  • Pliers
  • Level
  • Measuring tape
  • Safety glasses
  • Work gloves

Required Materials

  • Lubricant (silicone-based or designed specifically for sliding door tracks)
  • Steel wool or fine-grit sandpaper
  • Replacement rollers (if needed)
  • Replacement track (if extensive damage is present)

Identifying Sliding Door Track Issues

Before you start repairs, evaluate the extent of the damage to your sliding door track to determine if simple repairs will work or if you need a more serious fix. 

Visual Inspection

Look at the track for obvious signs of damage such as:

  • Bends or dents in the metal
  • Rust or corrosion
  • Debris accumulation
  • Loose or missing screws

Pay close attention to where the track meets the floor or frame, as this is a common problem area.

Functional Testing

After the visual inspection, test the door’s functionality to get a clear picture of how the track affects the door:

  • Open and close the door several times, noting any rough spots or resistance
  • Listen for unusual noises such as grinding or squeaking
  • Check if the door stays on the track or frequently jumps off
  • See that the door closes and locks properly

Step-by-Step Guide To Straightening Bent Tracks

Follow these steps to straighten out a bent or crooked track.

Prep the Work Area

  1. Clear the area around the sliding door and remove any furniture or obstacles.
  2. Put on your safety glasses and work gloves.
  3. Clean the track and remove any dirt or debris.

Remove the Door (If Necessary)

In some cases, you may need to remove the door to access the whole:

  1. Lift the door at an angle to disengage the rollers from the bottom track.
  2. Tilt the bottom of the door out and lift it off the track.
  3. Set the door aside in a safe place.

Straighten the Track

Now, let’s address the bent track. Be sure to take your time with this step to create a smooth gliding surface for the door:

  1. Locate the bent or damaged areas of the track.
  2. Place a wooden block into the track at the point of damage.
  3. Position your foot on top of the block to hold it steady.
  4. Using a hammer, carefully pound out the bends, bumps, and wrinkles in the track.
  5. Work slowly and methodically, checking your progress frequently.
  6. Use a level to keep the track straight along its entire length.

Repairing Other Sliding Door Track-Related Problems

While a bent track is a common issue, there are other problems you might have with your sliding door track.

Fixing Loose Tracks

If your track is loose:

  1. Tighten any visible screws along the track.
  2. If screws are stripped, replace them with slightly larger ones.
  3. For gaps between the track and the floor, use shims to create a secure fit.

Addressing Rust and Corrosion

For rusty or corroded tracks:

  1. Use steel wool or fine-grit sandpaper to remove surface rust.
  2. Clean the track thoroughly after sanding.
  3. Apply a rust-inhibiting primer and paint if necessary.
  4. Replace severely corroded sections of the track.

Common Mistakes to Avoid During Sliding Door Track Repair

While this repair can be a manageable DIY project, there are some common mistakes that you should avoid for better results and to prevent damage to your track.

  • Using too much force when straightening the track which can weaken the metal
  • Not cleaning and lubricating the track and rollers before and after the repair
  • Misaligning the door after repairs
  • Using the wrong type of lubricant, such as WD-40, which can attract dirt and gum up the track
  • Attempting to repair severely damaged or corroded tracks instead of replacing them
  • Ignoring the rollers, which may need to be replaced even if the track is repaired

Preventive Maintenance Tips for Sliding Door Tracks

To keep your sliding door tracks in good condition and prevent future issues:

  1. Clean the tracks regularly, removing dirt and debris.
  2. Lubricate the tracks and rollers every few months with a silicone-based lubricant.
  3. Inspect the tracks periodically for signs of wear or damage.
  4. Address minor issues promptly before they become bigger problems.
  5. Adjust the door’s rollers as needed for proper alignment.

When To Call a Professional

While many sliding door track repairs can be DIY projects, in some cases, it’s best to hire a professional to avoid damage and save time, especially if the issue is complex:

  • If the track is severely damaged or warped beyond simple straightening
  • When the door frame itself is damaged or out of square
  • If you’re uncomfortable working with large, heavy glass doors
  • When specialized tools or parts are required for the repair

Replacing vs. Repairing Sliding Door Track

You may need to decide whether to repair your existing track or replace it entirely. Here are some factors to think about when making this decision: 

  • Age of the door and track
  • The extent of the damage
  • Frequency of issues
  • Energy efficiency of the current door
  • Overall condition of the door frame and surrounding structure
  • Your budget

Cost Comparison

Repair might be cheaper at first, but replacing the damaged part may be better for your door and make your home more energy efficient in the long run. Repairing a sliding door track typically costs between $20 and $100 to do yourself, and hiring a professional can cost an extra $75 to $150 for labor. Full track replacement can range from $75 to $250 for the part and between $400 and $1400 for labor. 

*Cost data sourced from Angi.

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