Garage doors rarely fail at a convenient time. If you need extension spring replacement in St. Louis, MO, we can often come out the same day when a technician is available. Side-mounted extension springs replaced in matched pairs, with safety cables installed.
Safety first: springs and cables hold hundreds of pounds of tension. Don't try to adjust or remove them yourself, and don't run the opener on a door that's crooked or has a broken spring.
When to call for extension spring replacement
- A stretched, sagging or snapped spring along one of the horizontal tracks
- The door lifts unevenly or sits crooked
- A missing or broken safety cable through the spring
- Pulleys squealing or wobbling
Why this happens
- Metal fatigue from years of stretching
- Rust and worn pulleys
- Mismatched springs from an earlier repair
What you can check yourself
- Make sure each extension spring has a safety cable running through it. That cable keeps a snapped spring from flying across the garage.
- Look at the pulleys and cables for fraying.
- Don't try to stretch or re-hook an extension spring under tension.
Still stuck? Our free symptom checker and troubleshooting wizard walk you through it step by step.
How we handle extension spring replacement
- Open the door fully and secure it so spring tension is released
- Replace both springs as a matched pair, color-coded for door weight
- Replace worn pulleys and lift cables if needed
- Install or replace the safety containment cables
- Balance the door and test it through several cycles
How much does extension spring replacement cost?
What moves the price:
- Door size and weight (single or double, steel or wood)
- Which parts need replacing and whether they are in stock
- Spring type and cycle rating
- Emergency or after-hours timing
These are typical U.S. ranges, not a quote. You get an exact price for your door before any work starts. For a quick estimate, try the repair cost calculator.
Extension Spring Replacement in St. Louis, MO
The swing from hot, humid summers to freezing winters in Missouri is hard on spring steel. Rust shortens spring life, and the first cold snap is when a worn spring tends to break.
Our extension spring replacement service covers St. Louis (ZIP codes 63101, 63102, 63103, 63104, 63105 and more) and nearby towns including East Saint Louis, IL (2.5 mi), Cahokia, IL (3.9 mi), Madison, IL (4.4 mi) and Centreville, IL (5 mi). Call (833) 435-8883 to book a visit in St. Louis.
Extension Spring Replacement: frequently asked questions
How much does extension spring replacement cost in St. Louis, MO?
Extension Spring Replacement typically costs $150-$350 including parts and labor, and usually takes 1-1.5 hours. The exact price depends on your door and the parts it needs, and you get it before any work starts. Call (833) 435-8883 for a quote.
Can you do extension spring replacement the same day?
Often, yes. When a technician is available we can usually come the same day, and common parts are carried on the truck. Doors that won't close or have a broken spring are treated as priority calls, and emergency service is available.
Is extension spring replacement covered by a warranty?
Our work comes with a 90-day labor warranty on repairs. New parts and doors also carry the manufacturer's warranty. Ask for the warranty details in writing with your quote.
Are your technicians licensed and insured?
Our technicians are insured, and where Missouri or St. Louis requires a contractor license for garage door work, the job is done under that license. You're welcome to ask for proof when you book.
Should I repair or replace my garage door?
A good rule of thumb: if the repair costs more than about 50% of a replacement, or the garage door is near the end of its life, replace it. A garage door typically lasts 15 to 30 years. If several panels are damaged, the door is rusted through or rotted, or parts are discontinued, replacing it is often better value. Springs are the exception: a broken spring is always replaced, never repaired. Our free repair vs. replace calculator can help you compare.