Every time you raise or lower your roller shutters, they grind and screech like something's trapped inside. It's tempting to reach straight for the phone and call a repair technician — but before you do, check your kitchen cupboard. The fix you need is probably already there, and it costs next to nothing.
Dust, pollen, and the greasy vapor that drifts out of a busy kitchen slowly build up inside the shutter rail. Over time, they combine into a sticky, gritty paste that drags against the slats with every movement. It's this buildup — not wear and tear — that causes the noise most people mistake for a broken shutter.
Why roller shutter rails get sticky
The rail itself isn't just getting dirty in the usual sense. Old lubricant residue and settling dust mix together inside the channel, forming a thick, abrasive paste. This coating grips the slats instead of letting them glide, creating that characteristic stuttering, scraping motion. Most of the time, the shutter mechanism is perfectly fine — it just needs a clean and a little lubrication.
The kitchen cupboard solution: cooking oil
Ordinary sunflower or vegetable oil — even a bottle you've already opened — works surprisingly well as a shutter rail lubricant. It forms a thin, smooth film on the metal surface, reduces friction almost immediately, and unlike aerosol sprays, it leaves no harsh chemical smell near an open window. It's also free, in the sense that you almost certainly already own it.
How to do it, step by step
- Clean before you lubricate. Use an old toothbrush or a thin cloth to remove loose dust and fluff from inside the rail first. Applying oil over existing grime will only glue the dirt in place and make things worse.
- A little oil goes a long way. Dab a few drops of oil onto a cotton pad or a lint-free cloth, then run it along the inner wall of the rail — the surface the slats actually slide against.
- Work the shutter up and down. After oiling, raise and lower the shutter several times so the oil spreads evenly along the full length of the rail.
- Wipe away any excess. If oil drips onto the windowsill or the bottom edge of the shutter, remove it with a dry paper towel straight away — leftover oil will attract fresh dust and undo your work.
A few things to watch out for
If you have a motorized electric shutter, keep the oil well away from the motor housing and any switches or wiring — apply it only to the metal rail itself. For wooden shutters, cooking oil can cause discoloration over time; a dry silicone-based lubricant is the safer choice in that case.
If your shutter slats are made of plastic or PVC, check the manufacturer's maintenance guide before using cooking oil — not every surface is compatible with it.
How often should you repeat this?
It's worth giving the rail a quick check a couple of times a year, especially if your home is dusty, or you open and close the shutters frequently throughout the day. The moment you notice the movement becoming heavier or hear a faint scraping sound when lowering them, start with a thorough clean of the rail. If the noise and stiffness persist even after cleaning and oiling, it's time to have a professional take a look — there may be a mechanical issue that goes beyond simple maintenance.
Is cooking oil safe to use on roller shutter rails?
Yes, for standard metal rails it works well as a light lubricant. Avoid using it near electrical components, on wooden shutters, or on plastic slats without first checking the manufacturer's guidance.
Why do roller shutters start making noise over time?
Dust, pollen, and kitchen grease gradually settle inside the rail and mix into a sticky paste that creates friction. It's usually a maintenance issue, not a sign the shutter is broken.
How often should roller shutter rails be cleaned?
A couple of times a year is a good rule of thumb, or whenever you notice the shutter moving less smoothly than usual. Homes with more dust or heavy daily use may need more frequent attention.
When should I call a professional instead of fixing it myself?
If cleaning and lubricating the rail doesn't resolve the noise or stiffness, it's worth having a technician inspect the shutter — there could be a mechanical fault that simple maintenance won't fix.
