How long do garage doors last?

No maker here prints a lifespan

None of the New Zealand makers' pages and manuals we drew on gives a lifespan in years for a garage door or an opener. What they print instead is a warranty, often measured in years and cycles together, and a service schedule. A cycle is one open and one close, and where a warranty gives both figures, it ends at whichever comes first.

So an honest answer comes in three parts: what the warranty covers, which parts wear out on a timetable of their own, and how well the door has been looked after. This guide takes each in turn.

A warranty is not a lifespan

A warranty is how long the maker will stand behind its product, on its terms. It doesn't mean the door stops working when the cover ends, and it doesn't guarantee the door gets that far if the terms are not kept. Most of that cover depends on servicing or upkeep. Dominator's service book, for one, sets visits at 12 months after installation (or 3,000 cycles), then at 3 years and 5 years.

Cycles count as much as years. A household that runs the door many times a day reaches a cycle limit long before one that drives out in the morning and back at night, so two identical doors can reach the end of their cover years apart.

Your rights run past the warranty too. Consumer Protection explains that under the Consumer Guarantees Act a product must be of acceptable quality, which includes being durable and able to last a reasonable time. That is worth knowing if a door or opener gives out early.

Springs and cables: the parts that wear

Springs are where the warranties draw a line. Dominator's metal sectional cover and Garador's 10 Year Reliability Warranty both leave springs out, and Dominator says its warranties exclude spring adjustment from normal wear and tear.

The makers expect springs to settle with use. Garador says it is natural for springs to lose tension, and B&D NZ says new springs are set with a little extra tension to allow for settling. Dominator's technician checklist includes spring tension among the items checked at a service.

Added weight speeds the wear. Dominator warns that insulating an existing door means it has to be weighed and fitted with new springs, or the opener's life is reduced. Cables are judged by their condition, not their age: Garador's advice is to call a dealer as soon as a lifting cable shows fraying or corrosion.

How long a garage door opener lasts

Opener cover reaches 7 years or 30,000 cycles on Dominator's Smart Pro, and 10 years or 20,000 cycles under the Dominator and Garador package warranties. Like the doors, none of them comes with a promised life beyond that.

An opener has an easier life on a door that moves freely. Dominator says an electric opener is only meant to work as a substitute for human strength, and its opener warranty asks that the door can be worked by hand with no more than 20kg of force. On Dominator's Smart Pro, Smart and Secure, six flashes of the main light mean a service is due, counted in cycles rather than months.

Batteries keep their own clock. Merlin's E475M battery backup manual says its battery lasts 3 to 5 years under normal usage, and ATA says the batteries in its next generation Battery Backup Kit should not need replacing for 4 to 5 years. Remote batteries are simpler: on Dominator's Smart Pro, Smart and Secure remotes, a flashing status light or no light means the CR2032 battery is due. Garage remotes and button batteries covers those. When the motor itself is done, see garage door motor replacement.

What the Building Code says about durability

The Building Code has a durability clause, B2, and it sometimes gets quoted as a lifespan. As MBIE prints it, clause B2.3.1 asks building elements to keep meeting the Code with only normal maintenance for 50, 15 or 5 years from the code compliance certificate, depending on how hard the element is to reach or replace and how easily a failure would be noticed.

MBIE's B2/AS1 third edition gives examples. Its Table C.1.1.1 lists non-fire rated external doors, frame included, at 15 years or more, and door furniture and hardware at 5 years or more. The parts of these documents we drew on don't name garage doors, so read them as what the Code asks of building elements, not as a promised life for your door.

MBIE's guidance on work that needs no building consent uses the same idea. It says that in most cases doors and windows in an external wall must last at least 15 years, and that replacing one that failed sooner needs a building consent. If a fairly new garage door has failed, ask your council before it is replaced. Garage door rules covers consents in more detail.

What helps a garage door last longer

Servicing on the makers' schedule is the main one. B&D NZ's care guide asks owners to look at how the door runs every 6 months, and suggests a sectional door is serviced within its first 12 months and every 2 years after, with roller and tilt door fittings every 12 months, more often under heavy use or harsh conditions.

Washing matters near the coast, because salt damage falls outside Dominator's cover. The rusty garage door guide gives each maker's washing interval. And notice when the door starts to feel heavier by hand: that is the opener being asked to do the springs' work.

Repair or replace an older door?

Age on its own doesn't decide it. Springs, cables, rollers and openers are all parts that get renewed, so a door whose curtain or panels are still sound can keep going for a long time with them replaced as they wear.

Replacement starts to make sense when the door itself is the problem: panels or a curtain rusting through, damage across several panels, or the same fault coming back after each repair. If the door or opener is still inside its warranty, go back to the installer or the maker's dealer first. Otherwise, garage door replacement covers the choices and garage door repairs covers the fixes.