The short answer
Common Causes of Cracks
Pool decks crack for several reasons. The most common is water infiltration. When rain or pool water seeps through small openings, it collects under the slab. Over time, that trapped moisture softens the soil or base material, causing the concrete to shift and crack.
Another cause is poor drainage around the pool area. If water pools near the deck edges, it can erode the ground underneath. Tree roots, soil settlement, and heavy traffic also play a part. In colder climates, freezing water expands and forces cracks open wider.
Signs of Water Damage
Cracks themselves are a sign, but look for other clues. Uneven sections, spalling (flaking surface), or white mineral deposits indicate moisture problems. If the deck feels spongy or moves when you walk on it, water damage is likely.
Check for water pooling after rain or irrigation. Look at the joint between the deck and the pool edge. If you see gaps or lifting, water may be getting underneath. Early detection helps you address the issue before it worsens.
- Cracks wider than a quarter inch
- Sections that settle or lift
- White chalky residue on the surface
- Spongy or hollow sounds when tapped
- Water pooling near the pool edge
- Visible erosion or washout under the deck
How to Inspect the Deck
Start by clearing the deck of furniture and debris. Use a straightedge to check for levelness. Run a hose over the surface and watch where water flows. If it collects in low spots, those areas may have base problems.
Look for cracks that follow a pattern, like straight lines or spider webs. These often point to structural movement. For a thorough check, consider moisture mapping. This process uses sensors to find hidden moisture under the deck, helping you understand the extent of the issue.
When to Call the Pros
If you see large cracks, significant settling, or signs of water damage, it's time to call local water damage pros. They can assess the situation and recommend next steps. They may suggest structural drying or dehumidification if moisture is a major factor.
The pros can also check for leaks in the pool itself or nearby pipes. A leak detection service can pinpoint the source. Acting quickly prevents further damage, so don't wait if you notice worsening cracks or water intrusion.
- Large or widening cracks
- Uneven or sagging sections
- Water pooling that doesn't drain
- Visible erosion under the deck
- Cracks near the pool edge or equipment
Preventing Future Cracks
Prevention starts with good drainage. Make sure gutters and downspouts direct water away from the deck. Seal small cracks with a flexible concrete crack filler to keep water out. Keep heavy plants away from the deck so their roots don't disturb the soil.
Regularly inspect the deck, especially after heavy rain. If you live in a cold climate, watch for seasonal changes. Addressing small issues early can save you from bigger repairs later. If you're unsure, a water damage inspection can give you a clear picture.
Water damage does not wait
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 fix a cracked pool deck myself?
Small hairline cracks can be filled with a quality concrete patching compound. Clean the area first and follow the product instructions. Larger cracks or uneven sections indicate structural problems, so those need professional assessment. Attempting a big repair without addressing the cause often leads to repeated cracking.
How do I know if water is under my pool deck?
Look for signs like pooling water, musty smells, or soft spots. You can also do a simple test: pour a bucket of water on the deck and see if it drains quickly or sits. For a definitive answer, moisture mapping can detect hidden moisture. That helps you decide if professional drying is needed.
Will my insurance cover pool deck repairs?
Policies vary, and your insurer decides what is covered. Water damage from a sudden leak might be covered, but gradual wear or poor maintenance often isn't. Review your policy and talk to your insurance company. If a burst pipe or flood caused the cracking, that could be a different situation.