Pool plaster repairs are essential for keeping your swimming pool looking beautiful and functioning safely—especially in Cape Town’s changing climate, with its hot summers and wet winters. Over time, plaster can wear down, crack, or discolour due to chemical imbalances, water pressure, or simple age.
In this article, we’ll explain how to repair plaster in a pool, signs to watch for, step-by-step methods, cost considerations, and when to call a pro like Pools Reno Cape Town.
Why Pool Plaster Cracks or Deteriorates
Pool plaster—commonly made from cement, sand, and water with additives—forms the smooth interior finish of most gunite or concrete pools. Even the most durable plaster can fail over time due to:
- pH and chemical imbalance
- Weather extremes (especially Cape Town’s winter rains and summer heat)
- Physical movement or ground shifting
- Poor initial installation or low-quality materials
- Age (10–15 years for most plaster pools)
Signs Your Pool Plaster Needs Repair
Not sure if your pool needs a touch-up or a full re-plaster? Look out for:
- Rough, sandpaper-like surfaces
- Hairline cracks or spider-web cracking
- Discolouration or mottled surface areas
- Chipping or delamination (flaking)
- Visible stains from minerals or algae
If you notice any of these, it’s time to consider a plaster repair or pool resurfacing.
How to Repair Pool Plaster (Step-by-Step)
Small surface repairs can often be DIY if you’re comfortable working with cement-based mixes. For anything large or structural, hire a professional.
Tools & Materials Needed
- Plaster mix (white or coloured to match)
- Bonding agent
- Chisel or grinder
- Trowel and sponge
- Pool brush
- Safety goggles and gloves
Step 1: Drain Water (if needed)
For large areas, partially or fully drain the pool. For small patch repairs, a dry patch area is enough.
Step 2: Chisel Out Damaged Area
Use a chisel or angle grinder to remove loose or hollow plaster. Undercut the edges slightly to help the patch hold.
Step 3: Clean and Prep
Brush away dust, rinse the area, and let it dry. Apply bonding agent to ensure proper adhesion of new plaster.
Step 4: Apply New Plaster
Mix according to the plaster brand’s directions. Trowel it into the repair area, smooth the surface, and feather edges into existing plaster.
Step 5: Cure and Brush
Let it cure for 24 hours (keep it moist during this time). Once filled, brush the pool multiple times a day for the first week to prevent streaking.
Cost of Pool Plaster Repairs in Cape Town
| Type of Repair | Estimated Cost (ZAR) |
|---|---|
| Small Patch Repair (DIY kit) | R300 – R800 |
| Professional Small Repair | R1,500 – R3,000 |
| Full Pool Replaster (standard pool) | R25,000 – R60,000 |
| Fibreglass Conversion (optional) | R40,000 – R80,000 |
Prices vary depending on pool size, material used, and location.
When to Call the Pros
If you’re dealing with:
- Cracks deeper than 3 mm
- Structural damage
- Widespread discolouration
- Stains that won’t scrub away
…it’s time to contact Pools Reno. Our team services Cape Town, Brackenfell, Durbanville, Stellenbosch, and the entire Western Cape, specialising in plaster, fibreglass relining, and modern renovations.
Internal Links
- Gunite Pool Installation in Cape Town
- Fibreglass Relining vs Replastering
- Pool Maintenance Services in Cape Town
External Links
- National Spa and Pool Institute of South Africa (NSPI)
- Cemcrete South Africa – Pool Plaster Products
- Swimming Pool Safety & Building Standards – Western Cape
FAQs: Pool Plaster Repairs in Cape Town
1. How long does pool plaster last?
Typically 10 to 15 years, depending on water chemistry and weather conditions. In Cape Town, rain and UV exposure can shorten that lifespan if not properly maintained.
2. Can I plaster my pool myself?
You can do minor patch jobs with the right tools and experience. However, full resurfacing is best handled by professionals for longevity and quality.
3. Is fibreglass relining better than replastering?
It depends on your budget and long-term goals. Fibreglass lasts longer (15–20 years), is smoother to the touch, and resists algae, but is more expensive upfront.
See our Fibreglass Pool Relining Guide
4. When is the best time to repair plaster in Cape Town?
Spring or early summer is ideal. Avoid Cape Town’s rainy winter season to ensure proper curing and application.
Need Expert Pool Repairs in Cape Town?
Whether you need a quick plaster patch, a full resurfacing, or want to upgrade to fibreglass or vinyl, Pools Reno offers professional pool repair services across Cape Town and the Western Cape.
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