How to Keep Water Out of Garage

Almost everyone has dealt with a flooded garage at some point. It’s a hassle to clean up and can cause a lot of damage, but there are ways to keep water out of your garage. This article will outline some tips to help you prevent water from entering your garage. So, keep reading to learn how to keep water out of garage!

How to Keep Water Out of Garage

It’s essential to keep your garage free of water because it can cause damage to your possessions and lead to mold growth. Water can also make it difficult to park your car inside the garage. Many people don’t realize that their garage is vulnerable to flooding because it’s not attached to their home. However, garages are often located on lower levels of a property, making them susceptible to flooding during heavy rains.

Why Does My Garage Door Leak?

You’re not alone if you’ve ever come home to a puddle of water near your garage door. Garage doors are one of the most common places for water leaks. There are several reasons why your garage door might be leaking, but the good news is that there are also several things you can do to fix the problem.

One of the most common reasons for a garage door leak is an improperly installed or damaged seal. The seal around your garage door helps to keep water and debris from getting into your home. However, if the seal is damaged, it can allow water to seep through. Therefore, you should regularly check the seal around your garage door to ensure it is intact and in good condition.

Another common reason for garage door leaks is a crack in the door itself. Over time, the sun and weather can cause the material of your garage door to degrade and develop cracks. These cracks can allow water to enter your home. Inspect your garage door regularly for any cracks or damage, and repair or replace the door if necessary.

A Detailed Guide on How to Keep Water Out of Garage

Keeping water out of your garage is essential to protect your belongings and maintain a safe and dry environment. Water intrusion can lead to damage, mold growth, and structural issues. In this guide, we will walk you through the steps to keep water out of your garage effectively.

Step 1: Assess the Existing Conditions

Start by assessing the current condition of your garage and identifying potential areas where water may enter. Look for signs of water damage, such as stains on the walls or floor, dampness, or musty odors. Inspect the garage door, windows, walls, roof, and floor for any cracks, gaps, or weaknesses.

Step 2: Seal the Garage Door

The garage door is a common entry point for water. Ensure that it is properly sealed to prevent water from seeping in. Follow these steps:

  1. Inspect the garage door seals for any signs of wear or damage. Replace worn-out or cracked seals.
  2. Clean the bottom seal and tracks to remove any debris or dirt that may interfere with a proper seal.
  3. Install a threshold seal at the bottom of the garage door to create a barrier against water infiltration.
  4. Consider adding weatherstripping to the sides and top of the garage door for additional protection.

Step 3: Check and Seal Windows and Doors

Windows and doors are potential areas for water intrusion. Inspect the seals around windows and doors and ensure they are in good condition. Here’s what you can do:

  1. Replace damaged or deteriorated seals around windows and doors.
  2. Apply caulk around the window frames and door frames to seal any gaps or cracks.
  3. Consider installing weatherstripping around windows and doors for added protection against water penetration.

Step 4: Repair Cracks and Gaps

Identify any cracks or gaps in the walls, foundation, or floor of the garage. These openings can allow water to enter during heavy rain or flooding. Follow these steps to repair them:

  1. Clean the cracks or gaps thoroughly, removing any dirt or debris.
  2. Use a concrete patching compound to fill small cracks and gaps in the walls and floor. Follow the manufacturer’s instructions for application.
  3. For larger cracks or gaps, consider using hydraulic cement or epoxy-based sealants for a more durable and long-lasting repair.
  4. Inspect the foundation for any significant cracks or structural issues. If you notice severe damage, consult a professional for evaluation and repair.

Step 5: Improve Drainage

Proper drainage is crucial to prevent water from pooling or accumulating around the garage. Follow these steps to improve drainage:

  1. Ensure that the area surrounding the garage is properly graded, sloping away from the structure. This will direct water away from the garage and prevent it from flowing towards the walls or foundation.
  2. Clear any debris, leaves, or dirt from the gutters and downspouts to ensure proper water flow.
  3. Install gutter extensions or downspout extensions to direct water farther away from the garage.
  4. Consider installing a French drain or a swale to channel water away from the garage if you have persistent drainage issues.

Step 6: Apply Waterproof Coatings

Applying a waterproof coating to the garage walls and floor can provide an extra layer of protection against water intrusion. Here’s what you can do:

  1. Clean the walls and floor of the garage thoroughly, removing any dirt, grease, or existing coatings.
  2. Apply a waterproofing paint or sealant to the walls, following the manufacturer’s instructions. Make sure to cover the entire surface, paying extra attention to the lower sections that are more prone to water exposure.
  3. For the garage floor, consider applying an epoxy coating or a specialized garage floor sealant designed to resist water penetration.

Step 7: Install Flood Barriers

If you live in an area prone to flooding, installing flood barriers can provide additional protection against water intrusion. Here are some options to consider:

  1. Removable Flood Barriers: These are temporary barriers that can be quickly installed when the threat of flooding arises. They can be made of materials like sandbags, water-filled barriers, or specialized flood panels. Follow the manufacturer’s instructions for proper installation and ensure a tight seal around the perimeter of the garage.
  2. Flood Vents: Flood vents are designed to allow water to flow through the garage during a flood, reducing the pressure on the walls and foundation. These vents typically have a mechanism that automatically opens and closes as water levels rise and fall. Consult a professional to determine the appropriate location and number of flood vents needed for your garage.

Step 8: Maintain and Monitor

Regular maintenance and monitoring are essential to ensure the effectiveness of your water protection measures. Here’s what you can do:

  1. Periodically inspect all seals, coatings, and barriers to ensure they are in good condition. Replace or repair any damaged or worn-out components promptly.
  2. Check for any signs of water intrusion, such as dampness, mold growth, or musty odors. Address these issues immediately to prevent further damage.
  3. Keep gutters, downspouts, and drains clear of debris to maintain proper water flow.
  4. Stay informed about local weather conditions and potential flood risks. Take proactive measures, such as elevating belongings or moving them to higher ground, if severe weather is expected.

Step 9: Consider Professional Assistance

If you are unsure about any of the steps or encounter more complex issues, it may be beneficial to seek professional assistance. A waterproofing specialist, garage door technician, or a general contractor experienced in dealing with water intrusion can provide expert guidance and help ensure your garage is properly protected.

By following these steps, you can effectively keep water out of your garage and protect your belongings from potential damage. Regular maintenance, monitoring, and proactive measures are key to maintaining a watertight garage. Remember, if you live in an area prone to flooding, additional flood protection measures may be necessary. Prioritize safety and consult professionals when needed to ensure the best possible results.


  1. Make sure that your garage door is sealed correctly and there are no gaps or cracks through which water can enter.
  2. Inspect the area around your garage door regularly, looking for any signs of water infiltration.
  3. If you notice any water entering your garage, take immediate action to address the issue and prevent further damage.
  4. Be sure to clean out your gutters regularly, as clogged gutters can cause water to back up and enter your garage through the roof or walls.
  5. If possible, elevation changes can be made to ensure that water drains away from your garage door and foundation.
  6. Proper landscaping around your home will help direct rainwater away from your garage door and foundation.
  7. If you live in an area prone to flooding, consider installing a floodproof barrier around your garage door to protect against water damage.
  8. Have a professional inspect your garage regularly for any water infiltration or structural damage signs.


If you have a garage, it is essential to take precautions to keep water out. By following these simple steps on how to keep water out of garage, you can protect your garage and everything inside from damage caused by water.

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Rick Kelly

I am Rick. I grew up helping my dad with his handyman service. I learned a lot from him about how to fix things, and also about how to work hard and take care of business. These days, I'm still into fixing things- only now, I'm doing it for a living. I'm always looking for new ways to help people grow and develop. That's why I have created this blog to share all my experience and knowledge so that I can help people who are interested in DIY repair.

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