Cracked pool plaster isn’t just a cosmetic issue—it’s often a warning sign of deeper structural or maintenance problems. If left untreated, small cracks can turn into costly repairs, leaks, and even full surface failure.
At Paradyme Coatings, we specialize in pool resurfacing solutions that restore durability, appearance, and long-term performance. In this guide, we’ll break down exactly what causes pool plaster to crack, how to prevent it, and when it’s time to call in professionals.
What Is Pool Plaster (and Why It Cracks)?
Pool plaster is the smooth, waterproof layer applied over gunite or concrete pools. While durable, it’s not immune to stress, chemical imbalance, or environmental factors.
The most common causes of pool plaster cracking include:
1. Ground Movement & Soil Shifting
One of the leading causes of cracks is movement beneath your pool.
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Expansive soils (like clay) swell and shrink with moisture
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Poor soil compaction during construction
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Natural settling over time
Real-world insight:We’ve seen homeowners ignore hairline cracks for months—only to discover foundation movement caused the issue. In these cases, pool resurfacing alone isn’t enough—you need structural evaluation first.
2. Improper Water Chemistry
Water chemistry plays a massive role in plaster longevity.
Key imbalances that cause cracking:
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Low calcium levels (etching and weakening)
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High pH or alkalinity (scale buildup and stress)
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Aggressive water (corrosive to plaster)
According to the Pool & Hot Tub Alliance (PHTA), maintaining balanced water chemistry is essential to preventing surface degradation.
Signs of chemical damage:
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Rough texture
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Discoloration
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Spiderweb cracks
3. Poor Installation or Low-Quality Materials
Not all pool plaster jobs are created equal.
Common installation mistakes:
These shortcuts often lead to premature cracking within just a few years.
At Paradyme Coatings, we use advanced coating systems like EcoFinish that outperform traditional plaster, offering longer lifespan and superior resistance to cracking.
4. Temperature Changes & Freeze-Thaw Cycles
Extreme temperature swings can stress your pool surface.
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Water expands when frozen
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Heat causes expansion in materials
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Repeated cycles weaken plaster integrity
Even in warmer regions, sudden temperature drops can contribute to micro-cracking over time.
5. Structural Stress & Hydrostatic Pressure
Pools are constantly under pressure—from both inside and outside.
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Groundwater pressure pushing upward
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Improper drainage systems
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Empty pools left exposed too long
Nothing lasts forever—not even pool plaster.
Over time, wear and tear naturally lead to:
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Surface fatigue
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Cracking
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Loss of waterproofing
If your pool is over a decade old, pool resurfacing is often the smartest investment.
When Are Cracks a Serious Problem?
Not all cracks are created equal. Here’s a quick breakdown:
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Structural cracks
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Water leakage
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Uneven surfaces
If you’re seeing structural cracks, it’s time to act immediately.
When Do You Need Pool Resurfacing?
You should consider pool resurfacing if you notice:
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Multiple cracks across the surface
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Rough, uncomfortable texture
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Stains or discoloration that won’t go away
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Water loss or suspected leaks
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Plaster older than 8–10 years
Benefits of resurfacing with Paradyme Coatings:
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Longer-lasting finishes (like EcoFinish)
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Improved durability and flexibility
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Modern, upgraded appearance
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Reduced maintenance costs
Call Paradyme Coatings at (678) 897-3456 to schedule your free consultation today!
How to Prevent Pool Plaster Cracking
Prevention is always cheaper than repair. Here’s what you can do:
1. Maintain Proper Water Chemistry
2. Don’t Drain Your Pool Unnecessarily
3. Address Small Cracks Early
4. Invest in Quality Resurfacing
Paradyme Coatings proudly provides pool resurfacing services across:
We understand the local soil conditions, climate, and pool construction challenges—giving homeowners a major advantage when it comes to long-term durability.
Final Thoughts: Don’t Ignore Cracks
Pool plaster cracks are more than just an eyesore—they’re often early warnings of bigger issues. Whether it’s soil movement, water chemistry, or simple aging, the key is addressing the problem before it escalates.
With years of hands-on experience and industry-leading materials, Paradyme Coatings delivers reliable, long-lasting pool resurfacing solutions you can trust.
Ready to Restore Your Pool?
Don’t wait until minor cracks turn into major repairs.
Call Paradyme Coatings today at (678) 897-3456 or visit our website to learn more! Transform your pool with expert resurfacing solutions that last.
