Why is your sliding window hard to slide?

Why your sliding window is hard to slide

A sliding window is usually hard to slide because something stops the panel rolling freely along its track. Most often it is dirt, which you can clean out yourself. Less often a part has worn, bent or slipped out of place, and that is a job for a window contractor. These are the usual causes:

• Grit and dust in the bottom track. Sand and dust build up, so the panel grinds or catches at one spot.
• Worn or broken rollers. The small wheels under the panel wear flat or crack, so it drags, rumbles or has to be lifted to move.
• A bent track. A knock can dent the track, so the panel jams at one point.
• A dropped panel. A panel that sits lower than before scrapes the frame and may no longer line up with its latch.
• A swollen rubber seal. A seal that has swollen, hardened or come loose rubs against the frame and adds drag.

A sliding window stuck halfway even after cleaning is the sign to stop forcing it, because pushing a damaged panel can strain the rollers further.

Clean the track safely

This is the part most people can do themselves, working from inside with every panel in its frame.

1. Close and lock the window. Shut every panel and fasten the latch so nothing can shift while you work on the exposed track from inside.
2. Vacuum the track. Use a narrow nozzle or a small brush to lift sand, dust and debris out of the bottom track and its corners.
3. Wipe with a damp cloth. Wipe along the track with a cloth damped in plain water to pick up the fine dust the vacuum leaves behind.
4. Dry and test. Let the track dry fully, then unlock the window and slide the panel gently a few times to see whether it now runs freely.

The Building and Construction Authority (BCA) notes that windows deteriorate with wear and tear from wind and rain, and gives homeowners three steps: check, clean, change (BCA window safety). Cleaning the track regularly also makes worn parts easier to spot.

If the rubber strip along the frame looks swollen, cracked or loose, see the guide to the window rubber seal.

Check the safety parts

For sliding windows, BCA's window maintenance check is to make sure the safety stopper and angle strip are in place and the panel slides smoothly (BCA window maintenance checks). Look at both from inside, without lifting the panel, and note anything missing, bent or loose.

HDB asks you to check your windows once every 6 months to make sure they work smoothly and have no loose or worn-out parts, and warns that windows that deteriorate can fall and cause serious injury to passers-by. If a window is in danger of falling, take precautions to secure it and engage a BCA-approved window contractor listed with HDB (HDB windows guide).

For a wider look at all the windows in your home, see the guide to window safety checks.

Sliding window repair: who does it

HDB says window works may only be done by BCA-approved window contractors listed with HDB, and homeowners can face penalties if a window falls through lack of maintenance (HDB windows guide). BCA says replacing windows needs an approved window contractor, registered with BCA under workhead RW01, and a trained window installer (BCA window safety).

Rollers are parts of the panel itself, so a window roller replacement is work on the panel rather than a simple clean. Ask the contractor whether they do it, what the job covers and whether they will check the safety stopper and angle strip at the same time. On a high floor, leave all of this to the contractor.

If the panel or frame needs replacing rather than repairing, read the guide to HDB window replacement rules first. To compare companies that offer this kind of work, see door and window repair, and ask each one whether it meets the contractor requirements above.

Getting a quote

HDB says engaging a window contractor is a private arrangement. Before you agree to the work, note the type and extent of work and all chargeable costs, compare quotes from more than one contractor and study the terms (HDB windows guide).

The price depends on the job, such as whether the panel only needs adjusting or needs new rollers, a new latch or a new track. Ask whether the quote includes parts, and whether the safety stopper and angle strip will be checked during the visit.

Questions