Garage Door Rust: Causes, Treatment and Prevention
Rust is common on steel garage doors in New England. Winter moisture and road salt help it spread. Light surface rust is easy to treat. Rust on springs or cables is a safety matter. This guide separates the two.
Why garage doors rust
- Moisture sits on the bottom panel after rain or snow.
- Road salt clings to the lower edge.
- Scratches and chips expose bare metal.
- Worn seals let water sit against the panel.
- Poor drainage near the door keeps the floor damp.
Light surface rust on a panel
Light rust looks like orange spots or a rough patch. You can often treat it.
- Wash the area. See how to clean a garage door.
- Sand the rust lightly until you reach clean metal.
- Wipe away dust.
- Apply a primer made for metal and then paint that matches your door.
Follow the product label. Wear eye protection and gloves.
Rust that needs more than paint
If the metal is flaking or has holes the panel is weakened. A panel with deep rust may need replacement. Read our panel repair page. If many panels are affected see when to replace a garage door.
Rust on springs and cables
Rust on a spring or a cable is different. It can weaken the metal. Springs and cables are under heavy tension. Do not sand or paint or spray them yourself. Have a technician look. Read why springs break and how to tell if a cable is frayed. A frayed cable is a reason to stop using the door. Our cable repair page explains what we check.
How to prevent rust
- Rinse salt off the lower door in winter and spring.
- Touch up chips and scratches early.
- Replace worn bottom seals. Here is how to tell when.
- Keep snow from piling against the door. See garage door problems in cold weather.
- Keep moving parts lightly lubricated.
If you are planning a new door ask about finishes and materials. See garage door materials compared. Our installation page explains the process.
Rust on springs or cables?
Call us or send a request. Do not treat these parts yourself. We will check what is safe.