The short answer
Start with a Visual Check
Begin by examining the garage floor and walls for water stains, dark patches, or flaking paint. Water often leaves behind a tide line or a faint ring. Look at the corners and edges, where moisture tends to collect first. A flashlight helps you spot subtle dampness on concrete or drywall.
Check the ceiling for brown or yellow spots, which can signal a roof leak or a problem from the floor above. Also inspect any stored boxes or furniture for water rings or warping. If you see any of these signs, the garage has likely seen water at some point. Mark the area with chalk so you can track whether it spreads.
- Look for dark stains on concrete or drywall
- Check for peeling paint or bubbling wallpaper
- Inspect ceiling for brown or yellow discoloration
- Feel stored items for dampness or mustiness
- Use a flashlight to see into dark corners
- Note any visible puddles or standing water
Check the Garage Door and Seals
The garage door is a common entry point for water. Inspect the rubber seal along the bottom and sides for cracks, gaps, or wear. If the seal is damaged, rain can blow in during a storm. Also check the weather stripping around the door frame. A simple test is to close the door and look for daylight coming through the edges.
Water can also enter through the door tracks or the gap between the door and the floor. If the garage is attached to the house, check the door that leads inside. Water may seep under this door and spread into the garage. If you live in Rowlett, keep the shutoff valve location written down, so you can stop water quickly in an emergency.
Inspect Plumbing and Drains
Look at any plumbing in the garage, such as a utility sink, water heater, or washing machine hookups. Check the pipes for condensation, drips, or corrosion. A slow leak can be hard to see but may leave mineral deposits or rust stains. Feel the pipes with your hand to detect moisture that has not yet pooled.
Floor drains can also back up during heavy rain, causing water to rise from below. Clear any debris from the drain grate and check that the drain slope is correct. If water pools around the drain, it may be blocked. A plumber can help if you suspect a deeper issue with the drain line.
Look for Water Entry from Outside
During or after a storm, check the exterior walls of the garage for cracks or gaps where water can seep in. The foundation may have settled, creating small openings. Look at the grading around the garage; the ground should slope away from the building. If the soil is flat or slopes toward the wall, water can pool and find its way inside.
Also inspect the roofline and gutters. Clogged gutters can overflow and send water down the side of the garage. Check the flashing where the roof meets the wall for gaps. If you notice water stains on the ceiling after rain, the roof may need attention. A roofer can assess the condition and recommend repairs.
Water damage does not wait
Call (214) 730-5993 any time, day or night, and describe what happened.
Call Now (214) 730-5993Frequently asked questions
What should I do if I find water in my garage?
Act quickly to remove any standing water and dry the area. Use towels or a wet vacuum if you have one. Move stored items to a dry place. If the leak is from a pipe, turn off the water supply. Then call local water damage pros to inspect and handle the situation.
Can I detect water in the garage with a moisture meter?
Yes, a moisture meter can help you find hidden dampness in drywall, wood, or concrete. You can buy one at a hardware store. Press the pins or sensor against the surface and read the moisture level. This is useful if you suspect a leak but cannot see it.
How do I know if the water in my garage is from rain or a pipe leak?
Check the source. If water appears after heavy rain, it likely comes from outside through the door, walls, or roof. If it appears during dry weather, it is probably a plumbing leak. Look for the pattern of the water stains to help pinpoint the entry point. A professional can help determine the cause.