When it comes to maintaining or resurfacing a swimming pool, few elements are as important as the plaster finish. Pool plaster plays a critical role in both the aesthetics and functionality of your pool. Whether you’re building a new pool or renovating an old one, understanding the purpose, types, application, and maintenance of pool plaster will help ensure a long-lasting and beautiful swimming experience.
This in-depth guide explores everything you need to know about plaster pool —from benefits and types to application techniques, signs of wear, and professional tips.
What Is Pool Plaster?
Pool plaster is the interior finish applied to the shell of a concrete or gunite swimming pool. It creates a waterproof layer, giving the plaster pool a smooth, attractive surface while protecting the underlying structure from chemical exposure and water damage.
Primary Functions of Pool Plaster:
- Provides waterproofing for concrete pools
- Creates a smooth, comfortable surface for swimmers
- Enhances the visual appeal of the pool
- Allows for color and texture customization
- Protects pool structure from chemical wear and erosion
Types of Pool Plaster Finishes
Over the years, pool plaster has evolved from standard white finishes to more advanced, durable, and aesthetically diverse materials. Here are the main types of pool plaster:
Standard White Plaster
This is the traditional and most economical option. Made from a mixture of white cement and marble dust, it offers a clean, classic look.
- Lifespan: 5–10 years
- Pros: Affordable, smooth finish
- Cons: Prone to staining and etching over time
Colored Plaster
Adding color pigments to the plaster mixture gives your pool a unique look—ranging from light blue to deep gray.
- Lifespan: Similar to white plaster
- Pros: Custom appearance
- Cons: Color may fade or blotch with age
Quartz Aggregate Plaster
Quartz plaster blends white or colored plaster with quartz crystals for a more durable and visually dynamic finish.
- Lifespan: 10–15 years
- Pros: More durable, stain-resistant, and colorful
- Cons: Slightly higher cost
Pebble Finish (Pebble Tec, Pebble Sheen)
Made from small, smooth pebbles blended into cement, pebble finishes are extremely durable and textured.
- Lifespan: 15–20+ years
- Pros: Highly durable, textured non-slip surface, luxurious look
- Cons: Higher cost, rougher feel underfoot
Glass Bead and Polished Finishes
Premium options using glass beads or polished aggregates for a luminous and ultra-smooth surface.
- Lifespan: 15–25 years
- Pros: Aesthetically stunning, long-lasting
- Cons: Most expensive option
When to Replaster Your Pool
Even the best plaster will wear out over time. Knowing when to replaster helps prevent major issues like leaks, swimmer discomfort, or structural damage.
Signs Your Pool Needs Replastering:
- Rough or pitted surface
- Visible cracks or chips
- Stains that don’t brush away
- Loss of color or luster
- Frequent algae or water chemistry issues
- Exposed gunite (underlying pool shell)
If your pool is over 8–10 years old and hasn’t been resurfaced, it’s time for an inspection.
The Pool Plastering Process
Professional pool plastering is a multi-step process that requires skill and proper conditions to ensure a flawless finish.
Step 1: Draining the Pool
All water is removed, and the surface is inspected for damage.
Step 2: Surface Preparation
Old plaster is chipped or sandblasted away, and the surface is acid-washed or power-washed to remove debris.
Step 3: Repairing and Bonding
Any cracks or damaged areas are patched, and a bonding agent is applied to ensure the new plaster adheres properly.
Step 4: Applying New Plaster
The plaster is troweled onto the surface in multiple coats, often by hand for an even, smooth application.
Step 5: Curing and Filling
Once set, the pool is slowly filled with water while brushing the walls and monitoring chemical levels.
Maintenance Tips for Pool Plaster Longevity
Proper maintenance significantly extends the life and beauty of your plaster finish.
Balance Water Chemistry
Keep pH (7.2–7.6), alkalinity (80–120 ppm), and calcium hardness (200–400 ppm) within ideal ranges to prevent scaling or etching.
Brush Regularly
Brush the surface weekly to prevent algae buildup, especially in the first month after replastering.
Monitor and Clean Stains
Use a stain remover or consult a pool pro if you see rust or metal stains.
Maintain Proper Circulation
Ensure your pump, filter, and skimmer are functioning efficiently to avoid dead zones.
Avoid Harsh Chemicals
Don’t overdose with chlorine or acids. Always add chemicals gradually and evenly.
Pros and Cons of Pool Plaster
Pros
- Economical for most pool owners
- Smooth and comfortable surface
- Customizable with color and aggregates
- Durable when properly maintained
Cons
- Susceptible to staining if poorly maintained
- Shorter lifespan compared to tile or fiberglass
- Requires periodic resurfacing
Alternatives to Pool Plaster
If you’re looking for something different, consider these alternatives:
- Fiberglass Resurfacing: A smooth, durable shell sprayed or molded over the pool.
- Pool Tiles: Ceramic or glass tile finishes that last 20+ years but are more expensive.
- Vinyl Liner: Mostly used in above-ground or budget in-ground pools.
Each option has its own pros and costs, but plaster remains the most common for in-ground concrete pools.
Choosing the Right Pool Plaster Contractor
Pool plastering is not a DIY job. It requires professional tools, experience, and timing. To ensure quality results:
- Hire licensed and insured contractors
- Ask about experience with your plaster type
- Request references and check reviews
- Get a detailed, written quote
- Inquire about warranties on labor and materials
Conclusion
Pool plaster is the unsung hero of your swimming pool—it protects, beautifies, and provides a comfortable swimming environment. Whether you choose a classic white finish or upgrade to a luxurious pebble or quartz surface, investing in quality plaster and regular maintenance ensures years of safe and enjoyable swimming.
If your pool is showing signs of aging, don’t wait. A professional plaster renovation can restore your pool to like-new condition and enhance your property’s value and appeal.
