Sand Springs sits on the Arkansas River below Keystone Dam, and the town has seen what that means. In late May 2019 the Corps of Engineers ran releases from Keystone above a quarter of a million cubic feet per second for days, and low parts of Sand Springs were put under evacuation advisories. Most garage water here is smaller than that. A cloudburst on low ground near the river or one of the creeks puts a few inches across a slab for an afternoon, and it drains by evening.
Either way, once the floor is dry the door gets read from the bottom up.
Does a garage door have to be replaced after floodwater gets into the garage?
Usually not the whole door. Two things decide it: how high the water came up the sections, and how long it stood there. A few inches for a few hours mostly costs low parts. Water halfway up a foam-filled door for two days can go further, and that is where garage door replacement can come into it.
The water line is the best evidence you have, so look for it before anyone scrubs it off. A ring of silt on the inside face of the door, or a tide mark on the drywall beside it, shows the tech how far up the door sat wet.
Why do the safety eyes and the wall button quit first?
They are the lowest electrical parts on the door. The safety eyes are mounted by rule within six inches of the floor (the UL 325 standard sets that height so a small child cannot slip under the beam), so any water deep enough to cross the slab reaches them before it reaches anything else. The thin wires feeding them run along the wall at the same height.
The wall button sits well above the water and usually comes through fine. When it does go dead after a flood, the fault tends to be in its wire where that run comes down low on the wall.
What it looks like afterwards is a door that starts down and runs back up, or will not move from the button at all. The usual sensor checks for a door that won’t close are on their own guide. After a flood, though, an eye that sat under water is often finished rather than dirty or knocked out of line. Replacement eyes and a fresh wire run are a small repair, and the most common one after high water.
Is the opener safe to run once the water is gone?
Not until the power has been checked. The opener’s motor head hangs from the ceiling and almost always stays dry, but the outlet it plugs into, the circuit behind it and any wall outlet the water reached are an electrician’s call before anything gets plugged back in. Leave the opener off until that is done.
Once the circuit is cleared, the rest is door work. The opener gets run through its travel and its safety-reverse test with new eyes in place, and the wall button gets checked on its own wire. Opener repair after the motor head took water is rare in a garage flood. It happens mostly where an opener was mounted unusually low or the water rose far higher than a slab’s worth.
Can an insulated door that sat in water be kept?
Sometimes, and it depends on what is inside the sections. A foam-filled section is two steel skins with insulation between them. If water got in through the bottom edge or a seam, it is trapped in there with no way to dry, and the steel starts rusting from the inside where nobody can see it.
Trapped water also adds weight the springs were never sized for, so the door no longer balances, the same problem behind a spring that keeps breaking.
A tech judges it three ways. Does the door weigh more than it should on the balance check? Does it hold position halfway, or drift? And do the seams along the bottom sections weep rust or show the skins separating from the foam? A door that passes all three, a few weeks after the water, is usually fine to keep. The insulated door guide covers what the insulation is for in the first place.
Wood is its own case. A wood door that soaked can swell, split along the panels, or warp enough to bind in the opening, and some of it shrinks back once dry and some does not. That one gets looked at after it has had a couple of weeks to dry out.
Which parts get swapped, and which just get cleaned?
Most of the hardware gets cleaned and kept, a few low parts get swapped, and two parts get a tech’s eyes before the door runs much. The sorting follows the water line. Steel that dried off clean is usually fine, while anything electrical that sat under water, or anything with a bearing or a rubber channel that filled with silt, tends to be cheaper to replace than to coax back.
- Tracks get wiped down and dried along their full length, and stay.
- Rollers that still turn quietly by hand stay too.
- Safety eyes that sat in water get swapped.
- The wall button or its wire run gets swapped if either shorted.
- A bottom seal packed with silt is replaced.
- Bottom rollers with gritty bearings are replaced.
- Lift cables and bottom brackets get checked by a tech for rust pitting.
Cables and bottom brackets hold the springs’ full tension, and a bracket pitted near the floor can look harmless. That check belongs to someone with the tools to take tension off the door, not a homeowner with a wrench.
When is a flooded door a replacement?
A door is a replacement after a flood when the water got into the sections and stayed. That shows up in a handful of ways, some right away and some months later, and none of them is fixed by cleaning or new low parts.
The slow one is rust. Sections that held water can look fine for a season, then start blistering along the inside face and bottom seams as the steel goes from the inside out. An insulated door whose skins have pulled away from the foam, or that still carries water weight after a few weeks, is in the same spot. So is a wood door that swelled and split rather than drying back to shape. And a door that was close to the end anyway, with tired springs and a model nobody makes now, is rarely worth rebuilding around flood damage.
When the damage stops at one section, a single section swap runs $250 to $700, provided the door model is still made. When it runs through several sections, a new two-car door comes in at $1,100 to $2,800 installed, and the price board lays out what a section or a new door costs line by line. A door caught in the middle gets both numbers side by side, with the reasoning, and garage door installation covers what a new door includes.
Doors that took water are worth a second look a couple of months later, even if they passed the first one. Bubbling paint low on the inside face, or an opener that has started to strain on the way up, is the early sign, and at that point one section may still cover it.