Why does your sliding patio door make a grinding noise?

The symptom

The door grinds, scrapes, or rumbles as it slides. The sound comes from the bottom of the panel, and the door usually takes more effort to move than it used to.

This guide covers the sound itself: what it points to, the one step manufacturers hand to owners, and when to stop and ask for a repair. It does not ask you to take anything apart.

If the main complaint is effort and not noise, start with why a sliding door is hard to open, which sorts a dragging door into its causes.

What the noise points to

The noise points first to the rollers. Of the manufacturer documents we opened, one ties noise to a part. Andersen's help center says rollers may wear over time, and that rollers which make noise while the door opens or closes should be inspected to see whether they need replacing. Its test for a roller that needs replacing is that it is hard to spin, chipped, cracked, or worn.

That agrees with this site's hard-to-open guide, which reads grinding as a roller wheel that is not turning.

The same documents tie three other faults to rough or stiff travel. They do not tie them to sound. They are worth ruling out when a noisy door is also hard to move.

• Debris in the track. Andersen says the sill track may need cleaning when there is visible debris, when the door's travel is bumpy, or when it takes more effort than normal.
• A damaged track. Andersen has the sill track cap, the part of the frame the rollers sit in, checked for dents and bad scratches when the rollers are inspected.
• A panel riding too low. JELD-WEN says rollers adjusted too low can make the panel drag on the lower track. Andersen says a panel that moves stiffly may be dragging because the door is out of alignment.

MI Windows and Doors groups the same three for a door that is hard to open and close: debris clogging the track, worn rollers, or a door out of alignment.

Start with the track

Cleaning the track is the step manufacturers give to owners, and it is done with the door in place.

• JELD-WEN lists a dirty sill track first among the causes of a panel that will not open, and its remedy starts with cleaning the track. In its row on water leaks, it cleans the sill track with a vacuum or a damp cloth.
• Andersen says to open the door, clear dirt and debris from the sill track with a soft-bristle brush and warm, mild soapy water, rinse with clean water, and let the track dry before closing the door.

Andersen recommends this at least once a year. It recommends at least every three months in coastal, industrial, or agricultural areas, where more dirt, dust, and salt are in the air.

After cleaning, slide the door through its full travel and listen again.

Lubricant: check your door's instructions first

The two manufacturers whose instructions we opened disagree about where lubricant goes.

• JELD-WEN says to clean the sill track and then lubricate it with silicone spray on a cloth.
• Andersen says to apply a dry lubricant spray to the rollers through the adjustment hole, with the panel in place. It also says: "Do not use lubricant on the track; this will cause the rollers to slide, instead of roll."

No single rule covers every door. Follow the instructions for your own door. If yours is an Andersen 100 Series, the Andersen 100 Series gliding door guide collects Andersen's care steps for that door, including where the lubricant goes. If you do not know who made it, clean the track and stop there.

Lubricant is maintenance. Andersen's answer to a roller that is chipped, cracked, or worn is a replacement roller.

What you can observe safely

Each of these is done by looking and listening, with the panel on its track.

1. Where the sound happens. Does the door grind along its whole travel, or at one spot?
2. Which end it comes from. JELD-WEN puts a roller adjustment point at each lower end of the sliding panel. Note which end the sound is nearer.
3. The track after cleaning. Look for a dent, a flattened stretch, or deep scratches. Look and do not feel, because a damaged track can have sharp edges.
4. The bottom of the panel. Does the panel's bottom edge touch the sill anywhere? Is the gap under it even from end to end?
5. The history. Has the sound grown over months, or did it start suddenly?

You cannot check the rollers themselves. Andersen states that the panel must be removed to inspect them. JELD-WEN's vinyl patio door guide says patio door panels are very heavy and that removal takes two or more people, and it marks removing the sliding panel for professionals only.

Leave the adjustment screws alone as well. JELD-WEN's guides show that the direction of turn differs between door lines, and they warn that a panel set too high lets in water and air.

When to ask for a repair

Ask for help in any of these cases:

• cleaning the track did not change the sound;
• the door is getting louder or heavier;
• the panel sits lower at one end;
• you can see a dent or deep scratches in the track;
• the door has started to leave its track, which the off-track guide covers.

MI Windows and Doors notes that when the adjustment screws no longer work, the hardware is probably worn beyond simple adjustment.

Rollers and track are checked together. Andersen says a damaged sill track cap should be ordered along with the rollers, and that rollers may not need replacing where nothing is visibly damaged. A technician decides this with the panel out.

What a technician does

A technician cleans the track and checks roller height first. If the sound remains, the sliding panel is removed and the rollers and track are inspected. JELD-WEN's roller replacement procedure begins with removing the panel and laying it flat, and its vinyl guide says panel removal takes two or more people.

Where to go next

• The roller repair page covers worn and badly adjusted rollers.
• The track repair page covers a dented or worn track.
• The cost factors guide explains what makes a repair larger or smaller.
• The glossary explains the part names used here.

To ask about a repair in Plano, Allen, McKinney, or Frisco, describe the sound and what you saw on the contact page. The photo guide lists what to photograph first. The operator reviews every inquiry and replies with the next step. Sending the form is not a booking.