The samples are lovely. Somebody has a photo of a house in Carmichael with a full-view aluminium and glass door and another of a carriage-house door in stained cedar, and the conversation is entirely about which one suits the elevation.

That is a reasonable conversation to have. It is just not the conversation that determines whether the door still works properly in five years. That one is about mass, and it happens either at the quote stage or expensively afterwards.

The number everything else hangs off

A garage door is a counterweight system. A torsion spring above the opening is wound to a specific tension so that it stores almost exactly the weight of the door. That is why you can lift a 300-pound door with one hand when it is set up correctly, and it is why a broken spring turns the same door into something that will not move at all.

The spring is specified by three things: wire diameter, inside diameter and length. Those three together produce a certain amount of stored energy per turn, and the installer winds it a calculated number of turns for the weight and the travel of your particular door.

Change the weight and none of that arithmetic holds. This is not a tolerance question. It is the central specification of the whole assembly.

What the materials actually weigh, relatively

No absolute figures, because they vary enormously by size and construction, but the ordering is stable and it is what surprises people:

• Single-skin steel is the lightest thing on the market and it is what a lot of houses came with.
• Insulated steel is meaningfully heavier, more so for injected polyurethane than for polystyrene board.
• Aluminium and glass full-view doors are heavier than people expect, because glass is dense even when the frame is light. Insulated glazing units roughly double the glass weight of single glazing.
• Solid wood is the heaviest by a wide margin, and it is the only material on the list whose weight changes with the weather. Wood takes up moisture in a Sacramento winter and gives it back in the summer, so a wood door is genuinely a different weight in January than in August.
• Steel with a wood overlay sits in between and is the usual compromise when somebody wants the carriage-house look without the maintenance.

What has to change with the door, and usually does not

When a heavier door replaces a lighter one, four things need attention. A good installation handles all four. A cheap quote handles the first and hopes.

• The springs. Recalculated for the new weight, which usually means new springs and often a different wire size, not simply more turns on the old ones. Winding an undersized spring further does not add capacity; it uses up its life faster.
• The cables and drums. Cable is rated, and drums are sized for a given door height and weight class. A heavier door on the original hardware is running closer to its limits every cycle.
• The hinges and rollers. Heavier doors want heavier gauge hinges and better rollers, because the loads at each pivot have gone up.
• The opener. Not necessarily a bigger one, because the springs should be carrying the weight. But the force settings have to be reset, and a full-view glass door is one of the few cases where the horsepower class is a genuine question.

There is a fifth, which applies to wood specifically: the header and the framing. Some older openings were framed for a light door and are not thrilled about a heavy one.

How to tell it was done properly, months later

Pull the release cord and lift the door by hand to about waist height, then let go.

It should stay put. If it sinks, the springs are under-sprung for the new weight and your opener has been carrying the difference since the day it went in. If it climbs, they are over-sprung, which is not the safe direction either: an over-sprung door fights the opener's safety reversal on the way down.

That test takes fifteen seconds and it is the entire quality control on a custom door installation. It is worth doing at handover and again after a season.

The maintenance nobody mentions on wood

A wood door is a piece of exterior joinery that moves several times a day. It needs finishing on all six faces including the top and bottom edges, and it needs refinishing on a cycle, particularly on a south or west elevation in this valley.

An unfinished bottom edge is how a wood door starts drinking water off the garage floor, and a door that gains water gains weight, which takes you back to the spring calculation.

The money question

No prices. What genuinely moves a custom door quote, in order: the material, the size, the glazing, and then the hardware that the weight requires. That last item is the one that gets trimmed to win a quote, and it is the one you will pay for later.

The comparison worth making between two quotes is not the door. It is whether the spring specification, the cable and drum sizing, and the hardware gauge are itemised at all. If one quote lists them and the other says fitted throughout, they are not quoting the same job.

What not to buy

• Do not buy a custom door quoted without new springs. If the weight changed and the springs did not, the arithmetic was not done.
• Do not buy a heavier opener to solve a spring problem. The opener is not supposed to be lifting the door. Making it more capable of doing the wrong job is how the rest of the hardware gets worn out.
• Do not buy solid wood without an honest conversation about refinishing. It is a beautiful door and it is a commitment. Overlay on steel exists precisely for people who want the look without that.
• Do not buy single glazing on a full-view door for a garage you cool. You are buying a large single-pane window facing the afternoon.

The short version

Pick the look you want. Then make sure the person hanging it has weighed it and specified the springs, cables, drums and hardware against that weight rather than against what was there before.

It is the least glamorous line on the quote and the only one that determines whether you are calling somebody about this door in eighteen months. Ideally not us.

Star Garage Door Repair · (833) 368-3891 · garagerepairstar.com
Lic. 1142048 · Serving Sacramento and the surrounding area.