Garage doors are generally the largest moving piece of machinery in your home, with an average size of 8′ wide and 7′ high for a single car door and 16″ by 7′ high for a double car door. Regardless of the type of material used, they will be heavy. That’s why there are springs and a counter balance system to take all that weight, and make it easy for you or your Garage Door Openers to handle easily.
Over time, springs do break and/or relax, making the doors feel heavier. Stripped openers gears are often caused by this type of problem. To check this – occasionally disconnect your door from the opener. Pull down on the Red cord to accomplish this… If the door is “heavy” and/or will not stay half open on its own… it’s a good idea to have some maintenance done. Note: Annual Maintenance is recommended.
Springs are dangerous – have a professional licensed garage door dealer check for proper spring tension, and adjust them if needed.