The short answer
Turn off the Water and Dry the Pan
Before you do anything, shut off the water supply to the shower. Look for a shutoff valve behind an access panel or under the sink. If you cannot find it, check your main water valve. Write down where it is so you can find it quickly in an emergency.
Dry the shower pan thoroughly with towels and allow it to air out for several hours. A wet surface hides cracks and makes sealant less effective. Use a flashlight to examine the pan from every angle, including the corners and the area where the pan meets the wall.
Inspect for Cracks and Failed Seals
Look for hairline cracks, chips, or discolored spots on the pan surface. Pay close attention to the drain flange and the silicone seal around the edges. Over time, these seals can shrink or peel, letting water seep through to the subfloor below.
If the pan is fiberglass or acrylic, small cracks can sometimes be repaired with a waterproof sealant designed for that material. However, if the crack is longer than a few inches or the pan feels soft when you press on it, the pan may need replacement. Do not ignore a soft spot, as it often signals rot underneath.
- Check the drain flange for gaps
- Look for rust or stains around the edges
- Press firmly on the pan to feel for soft spots
- Inspect the caulk line where the pan meets the wall
- Run a small amount of water and watch where it goes
Apply Sealant for Minor Leaks
For a small crack or a loose seal, clean the area with a mild cleaner and let it dry completely. Apply a waterproof silicone sealant or a fiberglass repair kit, following the product instructions. Smooth the sealant with a finger or a tool to create a watertight bead.
Let the sealant cure for the time recommended on the package, usually at least 24 hours. After it sets, run water over the area and check for drips underneath. If the leak persists, the problem is likely deeper, and you will need a more involved repair.
Know When to Call for Help
If the leak is beyond a simple sealant fix, or if you notice a musty smell, sagging ceiling, or buckling tile, it is time to bring in professionals. They can remove the damaged pan, repair the subfloor, and install a new pan correctly. Attempting a major repair without the right tools can cause more damage.
Also consider that water damage can extend beyond what you see. The pros can dry out the structure and check for hidden moisture. They can also help with cleanup if the leak caused overflow. For related issues, look into leak detection services or moisture mapping to find all affected areas.
Talk to someone now
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (801) 383-0232Frequently asked questions
Can I use a shower pan liner to fix a leak?
A liner can help in some cases, but it is a temporary fix. If the pan is cracked or the subfloor is wet, a liner will not solve the root problem. For a lasting repair, replace the pan or have a pro inspect the damage.
How do I know if the leak is from the pan or the plumbing?
Run water down the drain while the shower is off. If you see drips under the pan, it is the pan. If the leak only happens when water runs through the drain pipe, it may be a plumbing issue. Check the drain connection and the pipe beneath.
What should I do if the leak caused water damage to the ceiling below?
Dry the area quickly to prevent mold. Cut out any soaked drywall and allow the space to air out. Then have a professional inspect the subfloor and joists. They can dry the structure and determine if any repairs are needed before you replace the ceiling.