Rendering can completely transform the appearance and durability of a home. When done properly, it provides a smooth, clean finish that protects walls from weather conditions and gives them a modern, refreshed look. However, like any trade, rendering requires skill, precision, and experience. Unfortunately, many projects go wrong because of avoidable mistakes.
At Australian Rendering Company, with over 30 years of industry experience, we know the pitfalls that often lead to poor results — and more importantly, we know how to avoid them. Here are the seven most common rendering mistakes and how our experts ensure your project is done right the first time.
Poor Surface Preparation
One of the biggest mistakes in rendering is rushing the preparation stage. Applying render over dirty, flaky, or uneven surfaces can lead to cracking, peeling, or weak adhesion.
How We Avoid It:
Our team thoroughly cleans and inspects every wall before applying render. Any dust, paint, or loose material is removed, and cracks or imperfections are repaired. This ensures the render bonds properly and lasts for many years.
Incorrect Mix Ratio
Using the wrong cement-to-sand ratio is a common issue with inexperienced renderers. A mix that’s too strong may crack, while one that’s too weak may crumble or not stick well.
How We Avoid It:
We follow strict Australian Building Standards and proven mix formulas, adjusting ratios based on the wall type and weather conditions. This guarantees a durable, consistent finish every time.
Applying Render Too Thick or Too Thin
Render needs to be applied evenly. Too thin, and it won’t provide adequate protection; too thick, and it may shrink and crack during drying.
How We Avoid It:
Our experts apply render in carefully measured layers, ensuring even coverage. We know the exact thickness required for different surfaces, so the finish is strong, smooth, and long-lasting.
Not Considering Weather Conditions
Rendering during extreme heat, heavy rain, or freezing conditions can ruin the finish. The render may dry too quickly, trap moisture, or fail to set properly.
How We Avoid It:
We always assess the weather before starting any job. If conditions aren’t right, we schedule work for the optimal time, ensuring your render cures correctly and maintains its integrity.
Poor Application Technique
Streaks, uneven textures, or visible joins often come from poor workmanship. Inconsistent troweling or rushing the job can leave walls looking patchy and unprofessional.
How We Avoid It:
Our team is highly trained in modern rendering techniques, from cement rendering to
acrylic and textured finishes. With decades of practice, we deliver smooth, flawless results without shortcuts.
Skipping Expansion Joints
Large wall areas need expansion joints to accommodate natural movement. Without them, cracks often appear as the building shifts over time.
How We Avoid It:
We incorporate expansion joints where needed, preventing future cracking and ensuring the render remains intact and attractive for years.
Using Low-Quality Materials
Cheap or unsuitable materials may save money upfront but lead to costly repairs later. Low-grade cement, poor sand, or inferior coatings compromise durability.
How We Avoid It: At Australian Rendering Company, we use only premium products that meet or exceed Australian standards. Combined with our warranty, this gives you confidence that your walls will stand the test of time.
Why Choose Us?
Rendering is more than just applying a coat — it’s about craftsmanship, experience, and attention to detail. By avoiding these common mistakes, we ensure every project is completed to the highest standard.
With 30+ years of experience, a 7-year warranty, and a commitment to professionalism, we provide rendering solutions that last. Whether you need cement rendering, architectural coatings, or full home rendering, our experts deliver reliable results every time.
Call us today to discuss your project and experience the difference of working with trusted local renderers in Melbourne.
Frequently Asked Questions (FAQs)
Q1: How long does rendering usually last?
A quality render, applied correctly with the right materials, can last 20–30 years or more. At Australian Rendering Company, we also provide a 7-year warranty for peace of mind.
Q2: Can rendering be done on any type of wall?
Yes. Rendering can be applied to brick, concrete, cement blocks, and even some lightweight cladding systems. Our team assesses the surface before starting to ensure the right method is used.
Q3: What’s the difference between cement rendering and acrylic rendering?
Cement rendering is traditional, strong, and durable, while acrylic rendering is more flexible, crack-resistant, and available in a wider range of finishes. The choice depends on your project needs and desired look.
Q4: How do I maintain my rendered walls?
Maintenance is minimal. Occasionally wash the surface with mild soap and water to remove dirt. Avoid harsh chemicals and high-pressure cleaning, which can damage the surface.
Q5: Is rendering weatherproof?
Yes, when applied correctly, rendering provides excellent weather protection, sealing your walls against moisture and improving energy efficiency.
Q6: How do I know if my old render needs repairing or replacing?
Signs include visible cracks, bulging, peeling, or water penetration. Our experts can inspect your walls and recommend whether repair or a fresh application is the best option.
