Rendering enhances the look of your Adelaide home and protects it from the city’s hot summers, cold winters, and occasional downpours.
With so many rendering materials available, it can be hard to choose the right one for your home. In this article, let’s compare the three most popular options, acrylic, polymer, and lime render, so you can make the right decision.
What is Acrylic Rendering?
Acrylic render uses acrylic, which is a type of plastic, as the key ingredient. It’s applied as a thin coat that’s about 2 to 4 mm thick over brick, concrete, or even painted walls to create a smooth and durable surface.
Pros of Acrylic Rendering
- Highly flexible: Acrylic render sticks to surfaces and moves with them, so it doesn’t crack when there’s a minor shift or vibration.
- Strong: It doesn’t crack easily, which makes it a great choice for the exterior of your home.
- Weather-resistant: This render resists heat, rain, and UV exposure exceptionally well.
- Quick-drying: Acrylic render dries to the touch within 2 to 4 hours and is ready for a second coat in about 7 hours.
- Variety of finishes: It comes in smooth, textured, and even patterned finishes.
- Easy to apply: This render is easy to apply to brick, cement, and painted walls.
Cons of Acrylic Rendering
- Expensive: It’s more expensive than polymer or lime render.
- Less breathable: Acrylic render forms a tight seal and doesn’t allow moisture to escape easily, so it’s less ideal for heritage stone buildings that need breathable materials.
Best For
Modern homes in Adelaide require a low-maintenance, long-lasting finish that resists cracking and weather damage.
What is Polymer Rendering?
Polymer render is a traditional cement-based material that has polymer additives like resins or plastic-based compounds mixed into it. These polymers make the render more durable, flexible, and weather-resistant.
Pros of Polymer Rendering
- Excellent adhesion: The polymer content helps the render stick to almost any surface.
- Durable: The addition of polymers makes the render more resistant to cracking and weather damage.
- Flexible: It’s both strong and flexible, so you don’t have to worry about unsightly hairline cracks on exterior walls.
- Dries fast: This render dries to the touch within 2 to 4 hours and is ready for a second coat in about 24 hours.
- Water-repellent: Polymer render repels water, so it’s great for exterior walls and damp indoor areas like bathrooms.
- Variety of finishes: It comes in various colors and textures.
Cons of Polymer Rendering
- Pricey: Polymer render is cheaper than acrylic, but it’s still on the expensive side compared to lime or cement render.
- Less breathable: It isn’t ideal for heritage buildings, as it forms a tight seal and doesn’t let moisture escape easily.
Best For
Newer homes where you want a strong, flexible, and stylish render.
What is Lime Rendering?
Lime render is a traditional building material that was used for centuries before acrylic and cement renders came along. It’s made from all-natural materials like lime, sand, and water, so it’s completely breathable.
Pros of Lime Rendering
- Highly breathable: It’s made of breathable materials and allows trapped moisture to escape.
- Self-healing: Minor cracks can naturally heal over time through carbonation. Lime absorbs carbon dioxide from the air to harden.
- Flexible: Lime render can absorb minor movements in the building without cracking, but it isn’t as flexible as acrylic or polymer.
- Beautiful finish: It has a natural, matte look that pairs well with traditional homes. You can also add texture to it.
- Eco-friendly: Lime render is made from lime, sand, and water, which are all natural and sustainable materials.
Cons of Lime Rendering
- Long drying time: It can take 5 to 6 days to dry, which is significantly longer compared to acrylic and polymer render.
- Not as durable: Lime render is durable, but it doesn’t resist heavy rain well.
- Difficult to maintain: It requires limewashing every 2 years to maintain its appearance.
Best For
Older Adelaide homes or heritage buildings that need a breathable finish.
Read More: How to Extend the Lifespan of Render in Adelaide’s Climate?
Acrylic vs. Polymer vs. Lime Render
Key Differences | Acrylic Render | Polymer Render | Lime Render |
Composition | Acrylic, which is a type of plastic | Cement-based material with polymer additives | Natural materials like lime, sand, and water |
Flexibility | Excellent | Very good | Moderate |
Breathability | Low | Slightly better than acrylic | High |
Durability | High | High | Moderate |
Drying time (Dries to touch) | 2 to 4 hours | 2 to 4 hours | 5 to 6 days |
Maintenance | Low | Low | Moderate |
Best for | Modern homes | Modern homes | Older homes or heritage buildings |
Cost | $40 to $50 per square meter | $30 to $40 per square meter | $50 to $55 per square meter |
Approximate lifespan | 25 to 30 years | 15 to 20 years | 10 to 15 years |
How to Choose the Best Rendering for Your Adelaide Home
The best rendering for your Adelaide home depends on its age and your budget. Here’s how you can choose one:
For Modern Homes
Acrylic render works exceptionally well for newly built homes made with materials like concrete or polystyrene. It’s flexible, dries fast, and can easily last for decades even in Adelaide’s changing weather conditions. It also comes in various finishes.
For Heritage or Older Homes
If your home was built with stone or clay bricks, lime render should be your go-to choice. It’s the most breathable, so moisture won’t get trapped inside the walls. Lime render comes in various finishes and has an elegant look that complements historic buildings.
Budget
Polymer render is a great choice if you’re on a budget but want something nearly as good as acrylic. It’s durable, flexible, and can adhere to almost any surface.
FAQs
Can you apply acrylic render over existing paint or old render?
Yes, you can apply acrylic render over already painted or previously rendered walls as long as the surface is clean and doesn’t have flaking paint or dust. A primer helps the new render adhere properly.
How long does each type of render last?
- Acrylic render: 25 to 30 years
- Polymer render: 15 to 20 years
- Lime render: 10 to 15 years
Does lime render crack easily?
Lime render is more durable and flexible than traditional cement render and can self-heal through carbonation. However, it can still crack if you apply it incorrectly or if it’s exposed to severe temperature changes.
Can I paint over acrylic or polymer render?
Yes, you can paint over acrylic or polymer renders once they are fully cured. They both take about 7 days to cure completely.
Which render is best for energy efficiency?
Acrylic and polymer renders insulate well, especially when you combine them with insulated panels like polystyrene boards. Lime render doesn’t insulate as well, but it keeps indoor humidity under control.
Read More: Why Hire a Professional Renderer for Your Adelaide Home?
The Final Word
Acrylic render is a great choice for modern homes because it’s durable, flexible, and resists weather changes. If you want a slightly less expensive option for modern homes but with similar benefits to acrylic render, go with polymer render. Lime render is ideal for heritage buildings or older Adelaide homes built with stone or clay bricks.
Swart Plastering offers professional rendering services in Adelaide for both residential and commercial properties. With over 100 years of award-winning experience, we provide lime, acrylic, and polymer rendering services tailored to your specific needs.
