The short answer
Inspect the Door Seal
The bottom edge of your garage door is a common entry point for water. Look for worn or cracked weatherstripping, which can leave gaps that let rain or runoff slip through. You can replace the rubber seal yourself if you are comfortable with basic tools, or you can ask a local handyman to do it.
Also check the sides and top of the door for gaps. If the door is slightly out of alignment, water can push through even with new seals. Tighten the track bolts and adjust the limit switch so the door closes flush against the floor. If the concrete floor is uneven, you may need a threshold ramp or a new seal that conforms to the surface.
Extend Downspouts and Gutters
Water often enters a garage because downspouts dump rain right next to the foundation. Extend each downspout at least 6 feet from the garage wall, using a flexible extension or a buried pipe that carries water away. Clean your gutters regularly so they do not overflow during heavy storms.
Spring storms can bring sudden downpours, so it pays to check your gutter system before the rainy season. Also make sure the ground slopes away from the garage slab. Fill low spots with compacted soil or gravel so water does not pool at the edge of the door.
Improve Drainage Around the Garage
Sometimes the issue is not the door but the yard around the garage. If the ground slopes toward the slab, water will naturally flow to the lowest point, which is often the garage entrance. Regrade the soil so it slopes away at a rate of at least 1 inch per 4 feet.
For stubborn areas, you can install a French drain or a catch basin that collects water before it reaches the garage. A trench drain across the garage opening is another option, especially if you have a driveway that slopes toward the door. These projects usually require excavation, so you may want to hire a local contractor for the work.
- Check the ground slope away from the garage at least once a year.
- Clean gutters and downspouts before heavy rain seasons.
- Replace any cracked or missing caulk along the garage floor and walls.
- Use a threshold seal or rubber ramp to close gaps under the door.
- Consider installing a storm drain at the low point of the driveway.
- Keep the garage floor sealed with a concrete sealer to reduce moisture absorption.
Seal Cracks in the Floor and Walls
Water can also enter through small cracks in the garage floor, especially where the floor meets the wall. Use a concrete patching compound to fill any cracks wider than a hairline. For hairline cracks, a quality concrete sealer or a waterproofing paint can help keep moisture out.
Pay attention to the expansion joint where the garage floor meets the house foundation. This joint can shift and open up over time. Fill it with a flexible polyurethane caulk that can expand and contract with temperature changes. If you see efflorescence, a white powdery residue, that is a sign of water seeping through the concrete from underneath.
When to Call the Pros
If water keeps entering despite your efforts, the problem may be more serious, such as a high water table or a foundation issue. A water damage inspection can help you understand where the water is coming from and what the right fix is. The pros can use moisture meters and visual checks to pinpoint the source.
For severe flooding, emergency water extraction may be needed to remove standing water and dry out the garage quickly. If the floor or drywall has been damaged, water-damaged flooring removal and drywall repair may follow. The pros can also handle crawlspace water extraction if water is pooling under the garage. Policies vary, and your insurer decides what is covered.
- Water pooling in the same spot after every rain.
- Cracks in the floor that keep growing wider.
- Musty smell in the garage that does not go away.
- Water stains on the walls or ceiling near the door.
- Efflorescence or bubbling paint on the concrete.
- Standing water that lasts more than a day after a storm.
Talk to someone now
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (469) 698-4610Frequently asked questions
Why does water come under my garage door even when it is closed?
The bottom seal is likely worn or the floor is uneven. Replace the weatherstripping first. If the floor dips, you may need a threshold ramp or a new seal that matches the slope. Also check that the door is adjusted to press down evenly.
Can I fix a sloping driveway that sends water into the garage?
Yes, but it can be a bigger project. You can regrade the driveway with asphalt or concrete, or install a trench drain at the low point. If the slope is severe, you may need to raise the driveway. A local contractor can give you a cost estimate based on the size and material.
Is water in the garage a sign of foundation problems?
Sometimes, but not always. Water can enter through a poor seal or drainage issue without affecting the foundation. If you notice large cracks, shifting walls, or water that comes up through the floor, have a water damage inspection done to check the structure.