Noticing daylight or cold air coming through your garage? You’re not alone. Many homeowners struggle with this issue and search for How To Fix Gaps On Side Of Garage Door to protect their home from pests, weather, and energy loss.

The good news? Most side gaps are fixable with simple tools and a bit of guidance—no need to call a professional right away.

What Causes Gaps On The Side Of A Garage Door?

Before fixing the problem, it’s important to understand why it happens. Identifying the root cause ensures you apply the right solution.

Common Causes:

• Worn-out weather stripping (most common)
• Misaligned tracks or door frame
• Foundation shifting over time
• Improper installation
• Warped or damaged door panels

Read too: Tc1 Tricode Garage Door Opener Remote W/ Clip Chamberlain: Complete Guide

According to housing experts, nearly 30% of garage energy loss is caused by poor sealing and insulation.

👉 Learn more about how garage doors function:
https://en.wikipedia.org/wiki/Garage_door

How To Fix Gaps On Side Of Garage Door (Step-by-Step)

Here’s a practical, beginner-friendly guide to fixing side gaps effectively.

Step 1: Inspect The Gap Carefully

Start by identifying:

• Gap size (inches or centimeters)
• Whether it appears on one or both sides
• If the gap changes when opening/closing

👉 Tip: Use a flashlight inside the garage at night to spot light leaks.

Step 2: Replace Or Adjust Weather Stripping

Best for: Small to medium gaps (up to 1 inch)

Tools Needed:

• Measuring tape
• Utility knife
• Hammer or drill
• New vinyl or rubber seal

Instructions:

1. Measure the height of your garage door (e.g., 7 ft or 84 inches)
2. Remove the old weather stripping
3. Cut the new strip to exact length
4. Align it so it presses firmly against the door edge
5. Nail or screw it in place every 12–16 inches

👉 Ideal compression: The seal should press lightly—too tight can affect door movement.

Step 3: Adjust The Track Alignment

Best for: Uneven gaps or gaps that widen at the top/bottom

Signs of misalignment:

• Door looks crooked
• Uneven spacing on sides
• Noisy operation

Instructions:

1. Loosen track mounting brackets slightly
2. Tap the track gently into proper alignment
3. Use a level to ensure vertical alignment
4. Tighten bolts securely

⚠️ Safety Tip: Disconnect the garage door opener before adjusting.

Step 4: Install A Garage Door Threshold Seal

Best for: Gaps at the bottom corners

Steps:

1. Clean the garage floor thoroughly
2. Apply adhesive sealant
3. Place the threshold strip evenly
4. Let it cure for 24 hours

👉 Typical threshold height: 0.5–1 inch

Step 5: Add Foam Or Sealant For Small Cracks

Best for: Tiny gaps and air leaks

Use:

• Expanding foam
• Silicone-based caulk

Application:

• Apply at 22–28°C (72–82°F) for best results
• Fill gaps gradually (foam expands)
• Trim excess after drying

Step 6: Replace Damaged Panels (If Needed)

If the gap is caused by structural damage:

• Cracked panels
• Warped wood
• Bent metal

👉 In this case, replacing the panel may cost $250–$800 per section.

Quick Fix Comparison Table

Pros vs Cons of DIY Fixes

✅ Advantages:

• Saves money (up to $300–$500 in labor)
• Quick solutions (1–3 hours)
• Improves insulation immediately

❌ Disadvantages:

• Risk of improper installation
• Temporary fixes for deeper issues
• Safety concerns with heavy doors

When Should You Call A Professional?

Not all gaps are DIY-friendly.

Call a pro if:

• The door is severely misaligned
• Tracks are bent or damaged
• Springs or cables are involved
• The gap exceeds 2 inches

👉 Professional repair typically costs $150–$500, depending on complexity.

How To Prevent Garage Door Gaps In The Future

Prevention is easier (and cheaper) than repair.

Maintenance Tips:

• Inspect seals every 6–12 months
• Clean tracks regularly
• Lubricate moving parts
• Check alignment annually
• Replace weather stripping every 2–3 years

FAQ: How To Fix Gaps On Side Of Garage Door

1. Why is there a gap on one side of my garage door?

This usually happens due to track misalignment or uneven foundation settling.

2. Can I fix garage door gaps myself?

Yes, most small gaps can be fixed using weather stripping or sealants. Larger issues may require professional help.

3. What is the best seal for garage door sides?

Vinyl and rubber weather stripping are the most durable and effective options.

4. How much does it cost to fix garage door gaps?

DIY fixes range from $10 to $200, while professional repairs can cost up to $500 or more.

5. Are garage door gaps dangerous?

Yes. They can allow:

• Pests (rodents, insects)
• Moisture and mold
• Heat loss (higher energy bills)

6. How long does it take to fix the gap?

Most fixes take 1–3 hours, depending on the method used.

Conclusion

Fixing side gaps doesn’t have to be complicated. With the right approach, you can quickly solve the problem and improve your garage’s insulation and security.

By following this guide on How To Fix Gaps On Side Of Garage Door, you’ll not only eliminate drafts and pests but also extend the lifespan of your garage door system.