Residential garage doors are available in many sizes, but several dimensions are especially common.

Single-car garage doors are often 8 or 9 feet wide, while double-car garage doors are commonly 16 feet wide. A 7-foot height is very common, although 8-foot and taller doors are also available.

Common sizes include:

• 8’ × 7’

• 9’ × 7’

• 10’ × 7’

• 16’ × 7’

• 18’ × 7’

• 8’ × 8’

• 9’ × 8’

• 16’ × 8’

Garage doors can also be ordered in many custom widths and heights.

When replacing a garage door, the opening isn’t the only measurement that matters. Side room, headroom, backroom and ceiling height can determine what track system and garage door opener can be installed.

A garage door may weigh hundreds of pounds, but a properly balanced door should still be relatively easy to operate.

That’s because the spring system counterbalances the weight of the door.

When the door closes, energy is stored in the springs. As the door opens, the springs release that energy and help lift the door.

The garage door opener should primarily control the movement of a properly balanced door. It should not have to compensate for a door that is extremely heavy because of broken, incorrect or improperly adjusted springs.

Torsion springs are commonly mounted on a shaft above the garage door.

The correct spring depends on several factors, including:

Door weight • Door height • Drum size • Track configuration • Spring inside diameter • Wire size • Spring length

This is why replacing a spring simply because it “looks about the same” isn’t the proper way to select one.

A correctly sized spring system helps the door remain balanced throughout its travel.

How Long Do Garage Door Springs Last?

Spring life is normally measured in cycles, with one complete opening and closing representing one cycle.

Many standard garage-door spring systems are designed around approximately 10,000 cycles, while higher-cycle spring configurations can be designed for substantially longer service life. Spring design—including wire diameter—can affect cycle life. 

Actual lifespan depends heavily on how frequently the garage door is used.

Many double garage doors use two torsion springs, although the correct configuration depends on the weight and design of the door.

Two springs can distribute the required torque between the springs and may provide another practical benefit: if one spring breaks, the other can sometimes help prevent the entire door weight from being completely unsupported.

However, the number of springs isn’t what determines whether a door is balanced correctly. The spring system must be properly calculated for the specific door.

The cables located near the bottom of a garage door wrap around drums mounted on the torsion shaft.

As the springs rotate the shaft, the drums wind or unwind the cables, raising or lowering the door.

A cable that comes off the drum can cause the door to:

Become crooked • Jam in the tracks • Stop halfway • Become extremely heavy • Come partially out of the track

A garage door with a loose or displaced cable should generally not be operated until the cause is identified.

Rollers guide the garage door through the vertical and horizontal tracks.

Residential doors may use plastic, steel or nylon rollers. Worn rollers can contribute to excessive noise, vibration and poor movement through the track.

A quality roller combined with properly aligned tracks can make a significant difference in how smoothly and quietly a garage door operates.

The track system guides the rollers as the door transitions from vertical to horizontal.

Different installations can require different track configurations, including:

Standard radius • Low-headroom • High-lift • Vertical-lift

The amount of space between the top of the garage door opening and the ceiling—commonly called headroom—is important when determining which configuration will work.

Low-headroom hardware can allow a garage door to operate where ceiling clearance is limited, while high-lift track can move the horizontal portion of the track closer to a high ceiling.

Garage doors are available with different construction and insulation options.

Non-Insulated Garage Doors

Typically use a single exterior steel skin. They’re economical and lightweight but provide little thermal insulation.

Polystyrene-Insulated Garage Doors

Rigid polystyrene insulation is installed behind the exterior steel section. Depending on the door, the interior may have a vinyl backing or an additional steel skin.

Polyurethane-Insulated Garage Doors

Polyurethane foam is injected between the door’s exterior and interior skins, where it expands and bonds to the structure.

These doors can provide higher insulation performance and increased section rigidity compared with many basic non-insulated designs.

What Does R-Value Mean?

R-value measures resistance to heat flow.

Generally, a higher R-value indicates greater insulating ability. However, the R-value of a garage door varies considerably depending on its construction, thickness and manufacturer.

For that reason, homeowners should compare the published R-value of the specific garage door model, rather than assuming every insulated door performs the same.

A garage door opener moves and controls the door, but the opener and the garage door are two separate systems.

Common residential opener types include:

Belt-Drive Openers

Use a reinforced belt to move the trolley. They’re popular when quiet operation is important.

Chain-Drive Openers

Use a metal chain and are known for their simple, durable design.

Wall-Mount / Jackshaft Openers

Mount beside the garage door instead of on the ceiling. This can free up overhead ceiling space and works particularly well with certain high-lift applications.

Modern openers may also offer:

Wi-Fi control • Battery backup • LED lighting • Keypads • Remotes • Vehicle integration • Automatic locks

Exact features depend on the opener model.

Modern automatic garage door openers incorporate entrapment-protection systems.

Photoelectric safety sensors near the bottom of the opening detect an obstruction across the doorway and are an important part of the system. Federal residential garage-door-opener requirements incorporate UL 325 safety provisions, including requirements related to entrapment protection. 

The opener’s force-reversal system is another important safety feature.

If a garage door fails a safety-reversal test, the cause should be corrected rather than simply increasing opener force to compensate for a problem with the door.

A garage door that opens normally but refuses to close may have an issue involving:

• Misaligned or obstructed safety sensors

• Damaged wiring

• Incorrect travel settings

• Opener problems

• Door binding

• Track or roller problems

If the opener operates but the door itself is difficult to move manually, the problem may be with the garage door rather than the opener

Garage doors can become noisy for many reasons.

Common causes include worn rollers, dry hinges, loose hardware, bearing wear, track problems, opener vibration or a door that isn’t properly balanced.

A garage door does not have to be completely silent, but grinding, popping, scraping or sudden changes in operating noise are worth investigating.

A properly functioning spring system offsets much of the door’s weight.

If a garage door suddenly becomes extremely heavy, common possibilities include:

A broken spring • Incorrect spring tension • Incorrect springs • A cable problem • Binding hardware

Continuing to operate a heavy or poorly balanced door with the automatic opener can place unnecessary stress on the opener and other components

Garage doors can come off track because of:

• Cable problems

• Damaged rollers

• Bent tracks

• Impact from a vehicle

• Loose hardware

• An obstruction

• Operating the door when it is crooked or damaged

An off-track garage door can be under substantial spring and cable tension and should be treated cautiously.

Regular inspection and maintenance can help identify worn components before they cause larger problems.

Homeowners can visually inspect the door for things such as loose hardware, damaged rollers, frayed cables, unusual movement and changes in operating noise.

Appropriate garage-door components such as hinges and rollers with serviceable bearings can also be lubricated according to manufacturer recommendations.

Torsion springs, bottom brackets and cables can be under significant tension. They should not be disassembled or adjusted by an inexperienced homeowner.

Not every damaged garage door needs to be replaced.

Repair often makes sense when the sections are in good condition and the problem is limited to components such as springs, cables, rollers, hinges or other serviceable hardware.

Replacement may make more sense when a door has:

Severely damaged sections • Significant corrosion • Structural damage • Repeated failures • Poor insulation • Obsolete hardware • Major cosmetic deterioration

A new garage door can also make sense when the homeowner wants improved insulation, appearance, wind resistance or modern hardware.

Horizontal reinforcement struts can increase the rigidity of garage-door sections and may be required on wider doors or certain installations.

However, adding struts does not automatically turn a standard garage door into a certified wind-rated garage door.

Wind-rated assemblies are tested as systems, and the required components and installation method must match the applicable product approval and engineering requirements. 

Adding struts also increases the weight of the door, which can require the spring system to be recalculated.

Can I open my garage door with a broken spring?

It may physically be possible in some situations, but the door can become extremely heavy and difficult to control. Operating the opener with a broken spring can also place excessive load on the opener. Professional service is recommended.

Should a garage door stay halfway open by itself?

A properly balanced garage door should generally be controllable throughout its travel without becoming excessively heavy or aggressively moving on its own. Exact behavior varies with the door and spring system.

Does a bigger garage door opener fix a heavy door?

No. A properly sized and balanced spring system should counterbalance the door. Installing a more powerful opener isn’t a substitute for correcting a spring or balance problem.

Are all garage door springs the same?

No. Wire size, inside diameter, length, wind direction and required torque can all vary.

Can I replace only one broken spring?

Sometimes, but on a two-spring system the springs are often similar in age and cycle history. Whether one or both should be replaced depends on the condition and specifications of the system.

How often should a garage door be serviced?

There’s no single interval appropriate for every door. Usage, environment, hardware and manufacturer recommendations all matter. A door showing unusual noise, poor balance, jerky movement or visible component wear should be inspected.

Legacy Garage Door LLC provides professional garage door repair, garage door opener installation, spring replacement, new garage doors and wind-rated garage door solutions throughout the Greater Houston and Galveston area.

Whether you’re dealing with a broken spring, a garage door that won’t open, a damaged door or you’re considering a complete replacement, we’re here to help.

Experience the Legacy Difference

Call Legacy Garage Door LLC
832-506-7019