2026-03-13 7 min read
If you own a home in West Covina. whether you're in a midcentury ranch in Galaxie, a Spanish-style estate in South Hills, or a townhome near Amar Road. your garage door faces one of the toughest enemies a mechanical system can have: relentless Southern California sun. Summers here routinely climb into the low-to-mid 90s°F, and some August days flirt with the upper end of the thermometer. That kind of sustained heat doesn't just make your garage uncomfortable. It accelerates wear on every component of your door system in ways most homeowners never notice until something breaks.
Heat affects garage doors in several distinct ways, and understanding each one helps you stay ahead of problems.
When temperatures rise, the metal components of your door. springs, tracks, and panels. expand. This thermal expansion can cause the door to warp slightly or fall out of alignment, leading to grinding, sticking, or a door that won't close flush. On a south- or west-facing garage wall in West Covina, panels that absorb direct afternoon sun can heat to temperatures well above the ambient air, making this issue even more pronounced.
High temperatures can cause the lubricants in your garage door system to thin out or evaporate faster than usual. Once lubrication is compromised, the metal-on-metal friction in your rollers, hinges, and springs increases dramatically. and that accelerates wear. A door that starts squeaking or grinding in July isn't just annoying; it's telling you the lubrication is already failing.
For a full picture of what proper maintenance looks like throughout the year, our seasonal maintenance checklist breaks it down month by month.
UV rays are notorious for causing paint and finish to fade and lose color over time. But it's not just cosmetic. prolonged UV exposure can also weaken certain garage door materials, potentially leading to cracks and reduced structural integrity. The bottom weather seal is particularly vulnerable: over time, UV exposure causes rubber seals to become brittle, crack, and lose their ability to keep out dust, insects, and hot air.
If you've noticed your seal looking cracked or flattened against the driveway, that's not a minor cosmetic issue. it's an energy and pest problem waiting to happen.
Heat also affects your garage door opener. When the garage interior is significantly hotter than the outside air. and an uninsulated garage can reach temperatures 20 to 30 degrees higher than ambient. the opener motor works harder to move the door. Over time, this thermal stress shortens the motor's lifespan and can cause false reversals where the door stops and reverses for no apparent reason.
Don't wait for your annual checkup. During West Covina's peak heat months. typically June through September. lubricate your door's rollers, hinges, and springs with a silicone-based or lithium-based product designed to withstand higher temperatures. Every six to eight weeks is a reasonable cadence when highs are consistently above 85°F.
Inspect the bottom seal and the side trim seals around your door. If they're cracked, brittle, or no longer making full contact with the ground or frame, replace them. This is a relatively inexpensive fix that pays dividends in temperature control, dust reduction, and pest prevention. all real concerns for West Covina homeowners near Galster Wilderness Park or the foothills areas.
Dark-colored garage doors absorb significantly more heat than lighter ones. If you're in the market for a new door or planning a repaint, choosing a lighter color or a UV-resistant finish can reduce surface temperature and slow down wear on both the paint and the materials underneath.
Before summer hits full force. ideally in late April or May. have a professional technician check your springs, cables, and opener settings. The springs are especially important: heat weakens them over time, and a broken spring is one of the most common (and disruptive) garage door failures. If you're not sure what to look for between service visits, our guide on recognizing early warning signs is a helpful starting point.
Garage Door West Covina offers seasonal tune-ups specifically designed for the San Gabriel Valley climate. It's worth scheduling one before the heat sets in rather than dealing with a failure in August.
Homeowners in neighboring cities like Covina and Baldwin Park face the same summer heat challenges. the entire eastern San Gabriel Valley bakes under the same conditions, and the maintenance principles are identical.
Q: How often should I lubricate my garage door in a hot climate like West Covina? A: During summer months when temperatures are consistently in the 85°F,95°F+ range, lubricate your door's moving parts every six to eight weeks. Use a product specifically formulated for garage doors. not WD-40, which is a solvent rather than a long-lasting lubricant.
Q: My garage door started reversing on its own this summer. Is the heat to blame? A: Quite possibly. High temperatures can cause metal components to expand, which changes the door's resistance and throws off the opener's sensitivity settings. A technician can recalibrate the travel limits and force settings to compensate. Check our FAQ page for more common opener issues and their causes.
Q: Will a darker garage door really wear out faster in West Covina? A: Yes. Dark surfaces absorb more radiant heat, which accelerates paint deterioration, increases thermal stress on panels, and raises the interior garage temperature. If your door faces south or west, this effect is even more pronounced. A light-colored door with a UV-resistant finish is a practical choice for this climate.