2026-03-29 7 min read
If you live in Index, you already know the rain is relentless. Tucked into the western foothills of the Cascade Mountains along the North Fork Skykomish River, this small town averages over 73 inches of rain per year. nearly double the national average. That's not a Pacific Northwest cliché. That's real, accumulated moisture pressing against every surface of your home, including the one you probably think about least: your garage door.
Down the highway in Sultan or Monroe, homeowners deal with similar rain totals. But up here in the Skykomish Valley, the humidity stays high even in the so-called dry months. February alone can hit 93% average relative humidity. That kind of persistent dampness doesn't just make the air feel heavy. it works on your garage door in ways that add up quietly until something stops working.
If your home. especially one of the older craftsman or cabin-style houses common in this part of Snohomish County. has a wood garage door, moisture is its biggest enemy. When rainwater saturates the wood, the door and its surrounding frame can swell. As that clearance shrinks, the door starts rubbing against the frame or gets stuck mid-travel. You might notice it first as sluggishness in cold, wet weather, then as a door that flat-out won't close all the way.
The fix isn't always dramatic. Sometimes it's resealing the door's finish before the damage sets in. But once wood has swelled and warped repeatedly through wet seasons, you're often looking at panel replacement or a full door swap. Our post on garage door panel repair covers what to look for before that point.
High humidity doesn't just affect wood. Springs, cables, hinges, and tracks are all vulnerable to corrosion in a climate like Index's. A small amount of surface rust on a spring might look cosmetic, but rust accelerates metal fatigue. especially in springs that are already cycling under significant tension with every door open and close. In wet climates, that process moves faster than it would in drier regions.
Check the springs above your door and the cable drums on either side. Any orange-brown discoloration, flaking, or visible pitting is worth having a professional look at. Don't wait for a loud bang to tell you the spring finally gave out.
The bottom seal on your garage door takes a beating in this part of Washington. It sits against the concrete floor every time the door closes, compressing, releasing, and eventually cracking or pulling away from the door panel. Once that seal fails, water creeps under the door with every rainstorm. That moisture then sits on your concrete floor, works under stored items, and creates the kind of slow, invisible damage. rust, mold, wood rot in shelving. that only becomes obvious when it's already expensive.
Side and top weatherstripping fails for similar reasons. UV exposure during the brief dry season hardens it, and then the cold wet months crack what's left. If you can feel a draft or see daylight around any edge of your closed door, the weatherstripping is gone.
You don't need to do a lot, but you do need to do it consistently. Here's a realistic checklist for keeping moisture from turning into a repair bill:
Lubricate moving parts twice a year. Use a silicone-based or lithium-grease lubricant on the springs, hinges, rollers, and tracks. Avoid WD-40. it's a solvent, not a lubricant, and it washes away fast in wet conditions. Do this once in fall before the rains settle in, and again in spring.
Inspect your bottom seal every season. Press the seal along its entire length. It should be pliable and firmly attached. If it's brittle, torn, or separating from the door, replace it before the next storm cycle.
Keep gutters clear above the garage. Overflowing gutters dump water directly onto and around your garage door. That pooling water at the base of the door. especially if it freezes on a cold night. can trap the door shut or accelerate rust at the bottom of the panels.
Check for rust on springs and cables at least once a year. This takes about two minutes. Look up at the torsion spring above the door and trace the cables from the spring drums down to the bottom brackets. Any visible rust or fraying means it's time to call a professional.
Treat wood doors with exterior paint or sealant. If you have a wood door, a properly applied coat of exterior paint. not stain. provides meaningfully better moisture protection in our wet climate. Plan to refinish every few years.
For a more complete seasonal checklist, the guide on preparing your garage door for winter has additional tips that apply to the wet-season conditions we deal with here in the Skykomish Valley.
Some garage doors in the Index area. particularly older vacation homes or cabins that sit unoccupied through the winter. have simply absorbed more moisture than maintenance can reverse. Wood rot in the frame, widespread rust throughout the hardware, and seal failures on multiple sides are signs that you're past the point of upkeep and into the territory of replacement.
If you're unsure whether your door is worth maintaining or better off replaced, our services page outlines what a full inspection looks like and what options make sense at different stages of wear.
The goal isn't to scare you into spending money. It's to help you spend it at the right time. on maintenance now, rather than emergency repairs later in the season when you'd rather be enjoying the river trail or the Town Wall.
Q: How often should I lubricate my garage door if I live in a wet climate like Index? A: Twice a year is the baseline. once in fall before the heavy rains, and once in spring. If you notice squeaking, stiffness, or grinding at any other point, lubricate immediately rather than waiting. Use a silicone-based lubricant on springs, rollers, and hinges.
Q: My wood garage door swells and sticks every winter. Is that fixable without replacing the whole door? A: Sometimes, yes. If the swelling is mild and the wood isn't rotted, refinishing with exterior paint and adjusting the door's travel limits can help. But if the door has warped significantly or the frame has absorbed repeated moisture cycles, panel replacement or a new door is often the more cost-effective path. A professional inspection will tell you which situation you're in.
Q: Can I just spray the bottom of my door with waterproofing spray instead of replacing the seal? A: Waterproofing spray won't substitute for a functional bottom seal. The seal physically blocks water from passing under the door. spray coatings don't create that barrier. Replace a failed seal; it's inexpensive and makes a real difference.