Can I convert extension springs to torsion springs in a low-headroom garage?

Extension springs are common in garages built before the late 1990s, especially in homes where the door opening sits close to the ceiling. Many of those garages have limited space above the door track, which is why extension springs were used in the first place. Torsion springs are safer and longer-lasting, but they require a shaft and tube assembly above the door. Here is how much headroom you actually need, what low-headroom kits change, and when the conversion is not practical.

What headroom means and why it limits the conversion

Headroom is the vertical distance between the top of the door opening and the ceiling (or lowest obstruction above the door). It determines how far the door can travel up and where the horizontal track runs.

A standard torsion spring conversion uses a 2-inch-diameter spring tube mounted on a header bracket above the door. The tube sits about 2 to 3 inches above the top of the door when closed. Add the spring coil diameter (typically 2 to 3 inches) and hardware clearance, and a standard system needs 14.5 inches of headroom above the door panel's high point.

Extension springs run along the horizontal track, parallel to the ceiling. They stretch as the door closes and do not require space above the door for a spring assembly. That is why they work in low-headroom situations.

If your garage has less than 14.5 inches, a standard torsion conversion will not fit. The tube hits the ceiling, the springs rub the framing, or the track hardware cannot be set to the correct pitch angle.

What low-headroom torsion kits change

Low-headroom torsion kits work in 10 to 14 inches of headroom by changing two things:

Smaller-diameter spring tube and springs: standard torsion systems use a 1-inch tube (ID) and springs wound around it. Low-headroom kits use a smaller tube or a flat track mounting bracket that positions the spring assembly differently. Some kits mount the spring below the header on the inside face of the door jamb rather than above the door panel.

Reduced horizontal track pitch: in a standard installation, the horizontal track pitches back from the vertical section at a slight angle (usually 1/4 inch per foot). Low-headroom systems use a flatter track pitch, which lets the door travel along a path closer to the ceiling and reduces the height the hardware assembly needs above the door.

The result: a low-headroom kit can work in as little as 10 inches of headroom. Between 10 and 14.5 inches, a low-headroom kit is typically the right choice. The spring sizing still follows the same IPPT calculation as any torsion spring; only the physical assembly changes.

Brands that make low-headroom torsion hardware: Clopay, Ideal, Amarr, and most commercial door hardware suppliers. The kit must match your door width and weight.

Measuring headroom correctly before ordering

Measure headroom at the center of the door opening. Take three measurements: left side, center, and right side. Garages with sloped ceilings, HVAC ductwork, or beam pockets can have uneven headroom across the span. Use the lowest measurement.

Measure from the top of the door panel in the closed position, not from the floor or from the door opening. The door panel high point is where headroom actually matters.

Also measure the distance from the face of the door to the front of any obstructions (beams, pipes, light fixtures) that cross above the door path. A torsion conversion does not just need vertical clearance; the shaft and spring must fit within the horizontal run back to the ceiling brackets.

Standard measurements you will need before calling a supplier:

• Headroom: distance from top of door panel (closed) to ceiling
• Door height: measured from floor to top of the opening
• Door width: inside width of the opening
• Door weight: from the manufacturer label on the side stile
• Sideroom: space on each side of the door inside the opening to the wall or jamb (standard is 3.5 inches per side)

One more measurement worth taking before you order: the distance from the face of the door back to the first ceiling obstruction (beam, pipe, or ductwork). In some garages, the headroom above the door is adequate, but a beam runs across the ceiling 18 inches back from the door. The spring shaft must extend from the center drum to wall brackets on each side. If a beam cuts through that horizontal run, the bracket placement must account for it. Low-headroom kits with adjustable bracket positions can work around many obstructions, but you need to know where they are before ordering the shaft length.

When a torsion conversion is not practical

Below 10 inches of headroom, standard low-headroom torsion kits do not fit. Options at that point are limited:

Wayne Dalton TorqueMaster: TorqueMaster is a proprietary enclosed torsion spring system that runs inside a horizontal tube mounted above the door. It can fit in less than 10 inches of headroom because the spring is contained within a smaller-diameter tube and does not need the same clearance as a traditional torsion assembly. The downside is that TorqueMaster springs are proprietary and must be replaced by authorized dealers in most cases.

Side-winder (California style): a side-winder mounts the torsion spring vertically on the door jamb beside the door rather than horizontally above the door opening. It works in very low headroom because the spring assembly does not consume any space above the door. Side-winders require 3 to 4 inches of sideroom on one side of the door and can be difficult to work with on wide two-car doors because cable angles become less favorable.

Keep extension springs and add safety cables: if conversion is not practical and the door currently has extension springs without safety cables, the most important immediate upgrade is installing safety cables inside each extension spring. A broken extension spring without a safety cable can fly across the garage with significant force. Safety cables cost under $20 per door and are a required safety feature on all extension spring systems.

Cost and safety comparison

Spring Type	Min. Headroom	Typical Lifespan	Safe Failure	Cost (parts + labor)
Extension springs	Any (no overhead needed)	8,000-10,000 cycles	Unsafe without cables	$150-$300
Standard torsion	14.5 inches	10,000-20,000 cycles	Safer (stays on shaft)	$250-$450
Low-headroom torsion	10 inches	10,000-20,000 cycles	Safer (stays on shaft)	$300-$550
TorqueMaster	Under 10 inches	10,000 cycles	Contained (proprietary)	$400-$700

The main safety advantage of any torsion system is that when the spring breaks, it stays wound on the shaft. It does not go anywhere. Extension springs under tension can separate from the track and travel across the garage if safety cables are not installed. That is the core reason to convert where headroom allows.

G Brothers Garage Doors serves the Denver metro and Front Range. We measure headroom before recommending a conversion, carry both standard and low-headroom torsion hardware, and install safety cables on any extension spring system that does not have them. Free estimates, same-day service available. Licensed and insured.