How to Address Water Leaking Into Your Garage Under the Wall

Last Updated on December 21, 2024 by Kravelv

Water leaking into your garage under the wall can be a frustrating and potentially damaging issue. Left unchecked, this problem can lead to structural damage, mold growth, and ruined belongings. Fortunately, with some effort and the right approach, you can identify the source of the problem and implement effective solutions. In this article, we will explore the causes, preventive measures, and repair methods for water intrusion into your garage.

Understanding the Causes

Water leaking under the wall into your garage usually stems from one or more of the following causes:

• Poor Grading: Improper slope around your home allows water to pool near the garage foundation, leading to seepage.
• Clogged or Damaged Gutters: Gutters and downspouts that don't channel water away effectively can cause runoff to infiltrate your garage.
• Foundation Cracks: Even small cracks in the foundation can allow water to seep into your garage.
• Ineffective Waterproofing: The absence of a proper vapor barrier or sealant along the garage walls and floor can exacerbate the problem.
• Faulty Garage Door Seals: Worn or damaged seals at the bottom of your garage door might allow water to enter during rainstorms.
• High Water Table: In areas with high water tables, water pressure can force moisture through weak points in the garage structure.

Inspecting the Problem Area

To identify the exact cause of the leak, follow these steps:

1. Check the Exterior Grading: Walk around your home to see if the soil slopes away from the garage. The ideal slope should drop about 6 inches for every 10 feet away from the foundation.
2. Inspect Gutters and Downspouts: Look for clogs, leaks, or disconnected sections that could cause water to overflow near the garage.
3. Examine the Foundation: Look for cracks or gaps in the concrete along the base of the garage walls.
4. Test the Garage Door Seals: Close the garage door and check if light or air passes through the bottom or sides.
5. Evaluate Drainage Systems: If your garage has a drain, ensure it's not clogged or improperly installed.
6. Monitor During Rain: Observe the garage during a rainstorm to pinpoint where water is entering.

Short-Term Fixes

If you need to mitigate the issue quickly while planning a permanent solution, consider these options:

• Seal Visible Cracks: Use hydraulic cement or masonry caulk to temporarily seal cracks in the foundation.
• Install Temporary Barriers: Lay sandbags or plastic sheets along the base of the garage wall to divert water.
• Improve Drainage: Redirect downspouts using extenders to carry water at least 6-10 feet away from the garage.

Permanent Solutions

To address water intrusion effectively, take the following long-term measures:

A. Improve Grading and Landscaping

• Regrade the Area: Add soil around the garage perimeter to ensure proper slope.
• Install a French Drain: A trench filled with gravel and a perforated pipe can collect and redirect water away from your garage.
• Plant Water-Absorbing Vegetation: Use plants and shrubs to absorb excess water and reduce pooling.

B. Repair and Seal the Foundation

• Fill Cracks: Use epoxy or polyurethane injection kits to seal foundation cracks permanently.
• Apply Waterproof Coating: Coat the garage walls and floor with a waterproof sealant to create a barrier against moisture.

C. Upgrade the Garage Door and Seals

• Replace Weatherstripping: Install new weatherstripping along the bottom and sides of the garage door.
• Install a Garage Door Threshold Seal: This rubber strip adheres to the floor and forms a tight seal with the door.

D. Enhance Drainage Systems

• Add Surface Drains: Install surface drains outside the garage to capture and redirect water.
• Maintain Existing Drains: Regularly clean and inspect floor drains to prevent blockages.

E. Consider Interior Solutions

• Install a Sump Pump: A sump pump can remove water that accumulates in your garage, particularly in areas with high water tables.
• Use Dehumidifiers: Reduce moisture levels inside the garage to prevent mold growth.

Preventive Maintenance

Once the problem is resolved, regular maintenance can help prevent future leaks:

• Inspect Gutters Quarterly: Ensure they remain free of debris and in good condition.
• Check for Cracks Annually: Inspect the foundation and garage floor for new cracks and seal them promptly.
• Monitor Landscaping: Ensure plants and soil do not shift and alter the grading over time.
• Test Garage Door Seals: Periodically check for wear and replace them as needed.

When to Call a Professional

While many homeowners can handle basic repairs, some situations require expert assistance:

• Severe Foundation Damage: If cracks are extensive or water intrusion is persistent, consult a structural engineer or foundation repair specialist.
• Complex Drainage Issues: Professionals can design and install advanced drainage systems like French drains or sump pumps.
• Waterproofing Installation: Experienced contractors can apply commercial-grade waterproof coatings for maximum protection.

Final Words

Water leaking into your garage under the wall is a common but manageable issue. By identifying the root cause, implementing effective fixes, and maintaining your property, you can safeguard your garage from water damage. Whether you tackle the repairs yourself or call in professionals, taking action promptly is key to protecting your home and belongings.