2026-07-01 7 min read A2Z Garage Doors
In our years serving Union, we've seen this problem again and again: homeowners ignore a small gap at the bottom of their garage door, then suddenly they're paying to heat an uninsulated space all winter. Weather stripping and seals are the first line of defense against drafts, moisture, pests, and energy loss. When they fail, your heating bill climbs, water seeps into your garage, and insects find an easy entry point.
Your garage door is one of the largest moving parts of your home. Every time it opens and closes, it creates a seal (or fails to) between the frame and the door itself. The bottom seal takes the most punishment because it sits on the threshold where the door meets concrete, exposed to weather, debris, and constant friction.
Over time, rubber hardens. Vinyl cracks. Metal bends. What started as a tight seal becomes a gap that lets cold air pour into your garage and adjacent living spaces. In Union's wet climate, that gap also means water intrusion during our frequent rains and snowmelt.
A properly functioning bottom seal can reduce your heating costs by 10 to 15 percent and keep moisture, spiders, and rodents out. It's a small component with outsized impact.
Look for these warning signs before winter arrives:
Visible gaps or cracks in the rubber or vinyl around the door frame or along the bottom seal. Drafts you can feel when the door is closed. Water pooling inside the garage after rain or snow. Pest entry (spider webs, rodent droppings, or insects near the bottom of the door).
If your garage door is more than 10 years old, your seals almost certainly need replacement. Even newer doors can fail prematurely if they've endured heavy use or extreme temperature swings.
The cost to replace weather stripping and seals typically ranges from $150 to $400 depending on your door size and seal type. This is far cheaper than replacing insulation, dealing with water damage, or heating an uninsulated space all season. For a detailed breakdown of what affects your repair costs, check our guide on garage door repair cost in Union, WA.
Bottom seal (threshold seal): The rubber or vinyl strip running horizontally across the base of the door. This takes the most abuse. It should be replaced every 5 to 7 years or whenever you see cracks, hardening, or gaps.
Side seals: Vertical strips along the left and right edges of the door frame. These prevent side drafts and water intrusion. They fail less often than bottom seals but still need inspection.
Top seal: Runs along the top of the door where it meets the header. Often overlooked, but critical for keeping rain and snow out.
Weatherstripping tape: Some doors use adhesive-backed foam or rubber tape instead of rigid seals. This is cheaper to replace but may need attention more frequently.
If your door is insulated, the seal quality becomes even more important. Poor seals undermine the R-value of your insulation. Learn more about how insulation and seals work together.
**Need weather stripping and seals in Union today?** Call (360) 625-9779. We offer same-day estimates and can often install replacement seals the same afternoon.
You can replace some seals yourself if you're handy. Bottom seals often slide into a channel at the base of the door and can be popped out and replaced in 30 minutes. Side and top seals may require more care.
However, if your door frame is bent, rusted, or misaligned, DIY replacement won't solve the problem. A professional can identify frame issues and ensure new seals sit flush against the door, creating an airtight fit.
Garage Door Union can inspect your seals, diagnose any frame problems, and provide a free estimate. We handle same-day service calls across Union and nearby areas. Schedule a free quote today.
Keep your seals healthy with simple maintenance:
Clean the threshold regularly. Remove dirt, leaves, and debris from the track and bottom seal area. This prevents buildup that causes seals to fail prematurely.
Lubricate moving parts. A light silicone spray on hinges, rollers, and the seal channel helps everything move smoothly and reduces stress on seals.
Inspect twice yearly. Check seals in spring and fall. Catch small cracks before they become large gaps.
Avoid pressure washing. High-pressure water can damage seals. Use a soft brush and mild detergent instead.
Monitor the alignment. If your door starts to sag or bind, the frame may be shifting. Misalignment puts extra stress on seals and causes premature failure.
If you notice water pooling inside after rain, feel strong drafts even with the door closed, or see visible damage to the door frame itself, call us. These issues require professional diagnosis. A bent frame or damaged track may need adjustment or replacement before new seals will work properly.
The sooner you address seal issues, the less damage occurs to your garage structure, insulation, and stored items. A small repair now prevents costly water or pest damage later.
Contact Garage Door Union at (360) 625-9779 or get a same-day estimate to schedule your inspection.
How long do garage door seals last? Bottom seals typically last 5 to 7 years with normal use. Side and top seals often last 8 to 10 years. Failure accelerates in extreme climates or if the door is used heavily. Regular lubrication and cleaning extend seal life.
Can I replace seals myself? Bottom seals that slide into a channel are often DIY-friendly. Side and top seals require more precision. If your frame is bent or misaligned, professional replacement ensures a proper fit and airtight seal. Improper installation leaves gaps.
What's the difference between bottom seal and threshold seal? They're the same thing. The threshold seal (or bottom seal) runs across the base of the door where it meets the concrete threshold. It's the most critical seal for keeping out water and drafts.
How much does it cost to replace weather stripping and seals? Replacement typically costs $150 to $400 depending on door size, seal type, and whether the frame needs repair. Get a free estimate from Garage Door Union to know your exact cost.
Do new seals improve energy efficiency? Yes. New seals eliminate drafts, reducing heating and cooling loss by 10 to 15 percent. The savings increase if your door is also insulated. Combined with good seals, insulation delivers maximum R-value.