The quote for a new garage door is often one line long. "Supply and install 16 by 7 insulated steel door, remove and dispose of existing." The picture on the brochure is lovely. The door arrives, goes up in an afternoon, and looks exactly like the picture.

Eighteen months later the opener is straining, the door drifts down when it is stopped halfway, and a spring breaks years before it should. Nothing was wrong with the door. What went wrong was everything the one-line quote did not mention.

The door is the panels. The system is everything holding them up.

A garage door is a set of sections hanging on a counterbalance system: springs that carry its weight, cables and drums that transfer that force to the bottom corners, tracks that guide it, and an opener that decides when it moves. Every one of those parts was matched to the door that was there before.

A new door is almost never the same weight as the old one. Insulated doors are heavier than single-skin ones, and a door with glass or a decorative overlay is heavier again. So the day a new door goes up on old hardware, the old hardware is carrying a load it was not chosen for. The installation is where that gets settled or skipped.

New springs, sized to the new door

The springs have to be calculated for the new door's weight and height, not carried over from the old one. Most manufacturers publish the weight of the doors they build, so there is very little guesswork here and no excuse for skipping it. Springs matched to the old door will leave the new one heavy or light from the first day, and the opener will spend its life making up the difference.

This is also the moment when a higher cycle rating costs least, because the springs are being fitted anyway. On a door that runs several times a day it is the one upgrade on the whole invoice that pays for itself in plain arithmetic.

Tracks, cables and drums: reused is a decision, not a default

Most new doors come with their own track and hardware, and most installations fit them. Sometimes the existing tracks are sound and a good installer will say so. What matters is that reusing them is a choice somebody made after looking, rather than a line that got left off to make the number smaller.

Old track can be bent from years of small impacts, sized for a lighter door, or mounted to a jamb that has softened behind it. Old cables have been flexing and rusting at the bottom corners for as long as the house has had a car. If the quote keeps any of it, it is fair to ask why, and what condition it is in.

The opener question, and the law that answers part of it

California settled one piece of this in 2019. Since July of that year, a replacement residential garage door may not be connected to an existing opener that has no battery backup. So if your opener predates that rule and has no backup, a new door brings a new opener, or at least a compliant one, whether you planned for it or not. Better to know that when comparing quotes than to find out from the installer.

If your opener already has battery backup and is working well, it can usually stay. A new door does not need a new opener, and it is worth being wary of any quote that bundles one in without saying why. What it does need is the opener's travel and force set up again for the new door, and a reinforcing bracket or strut across the top section where the opener arm attaches, so the pull of the motor does not slowly fold a lightweight panel.

The small parts that decide whether it seals

A new door closes against the same opening the old one did. The bottom seal comes with the door. The weatherstrip around the sides and top, fixed to the frame rather than the door, often does not, and it is the part that decides whether the new door keeps out dust, draughts and whatever lives in the hedge. In older houses the wooden jamb behind it can be soft at the bottom, which is better found before the new track is screwed into it than after.

What the quote should name

You do not need to know how to install a door to read a good quote for one. You only need to see these lines on it:

  • The door's make, model, size and insulation, rather than just "steel door".
  • New springs, sized for this door, with their cycle rating stated.
  • Whether the tracks, cables, drums and bearings are new or reused, and why if reused.
  • What happens to the opener: kept, replaced, or upgraded to battery backup.
  • A reinforcing strut or bracket on the top section if an opener is fitted.
  • Perimeter weatherstrip, and the condition of the jambs.
  • Removal and disposal of the old door, which weighs as much as it did the day it went up.

A quote with all of that on it can be compared with another one. A quote with none of it is describing a picture.

What not to add to the order

  • The heaviest insulation package, on a garage nobody heats or sits in. On a detached, unused garage it mostly buys a slightly less unpleasant garage.
  • A new opener to go with a new door, when the one you have is healthy and already has battery backup.
  • A premium finish on the side of the house nobody sees. Spend it on the springs instead.

None of those is a bad product. They are simply the lines a quote can grow by without the door working any better, and the springs are the line it quietly shrinks by.

The door is the easy part

Almost any company can hang a new door so that it looks right on the day. The difference between installations shows up in year two, and it lives in the springs, the hardware and the opener settings, none of which appear in the photograph.

We would rather sell you a door once, set up for the weight it actually is, than come back in eighteen months to do the half of the job that was left off the quote. Though we should admit the second visit would be ours as well.

Garage Door Doctor’Z · (833) 991-3899 · doctorzgaragedoor.com
CSLB C61/D28 · Lic. 1138150 · Serving the Sacramento Valley since 2018.