Common Roof Coating Mistakes and How to Avoid Them

Applying a roof coating is a brilliant way to extend the lifespan of your roof, improve its aesthetic appeal, and even reduce energy costs. However, if not done correctly, it can lead to several costly issues—something most homeowners want to avoid.

 

That’s why we’ve put together this guide to help you sidestep the most common roof coating mistakes with confidence and ease.

 

Why Proper Roof Coating Matters 

Your roof does more than just shelter you from the elements; it’s a key component of your home’s structural integrity and energy efficiency. Products like Globalcote roof coatings, designed specifically for Australia’s harsh climate, offer superior protection against UV rays and weathering.

But even the best product won’t perform as it should if applied improperly. That’s why understanding the common pitfalls—and how to avoid them—is essential.

 

5 Common Roof Coating Mistakes 

 

1. Skipping Proper Surface Preparation 

One of the biggest mistakes people make is applying roof coatings to a dirty or uneven surface. Dust, lichen, and moss can prevent the coating from adhering properly, leading to peeling or bubbling.

How to Avoid:

Always clean your roof thoroughly before applying any coating. Use a specialised product like Globalcote’s Prepcote Surface Treatment, which inhibits moss, lichen, and fungi, ensuring your roof is ready for a long-lasting, smooth finish. We particularly recommend this product for tile roofs, although it may not be suitable for metal roofs.

 

2. Ignoring Weather Conditions 

Roof coatings require specific weather conditions to cure properly. Applying them during rain, low temperature, or high humidity can reduce their effectiveness—or even lead to complete failure.

How to Avoid:

Plan ahead. Pick a dry day with mild temperatures to ensure optimal curing conditions. Most coating suppliers, like Globalcote, provide product datasheets with temperature and weather guidelines.

 

3. Choosing the Wrong Product 

Not all roof coatings are created equal, and using the wrong product for your roof material can lead to poor results. For example, paint for houses is not suitable for roofing applications.

How to Avoid:   

When it comes to choosing the right products for your roofing needs, it’s always wise to consult with a professional or check the manufacturer’s recommendations. For example, Globalcote has some fantastic tailored solutions that can really elevate your project.

Their  Elastacote Premium Membrane is perfect for masonry roofs, providing top-notch protection and durability. Plus, don’t overlook the Primecote Sealer/Primer, which is designed to boost adhesion on various surfaces.

With Elastacote and our other high-quality membranes, you can confidently coat tile or metal surfaces, ensuring your roof looks great and lasts for years to come.

 

4. Applying Too Much or Too Little Coating 

Either extreme can result in problems. Too much coating can cause blistering, while too little may fail to provide adequate protection to your roof.

How to Avoid:

Follow the product’s application instructions carefully. Experts recommend using the right equipment, such as an airless sprayer, to apply an even, seamless layer.

 

5. Not Using a High-Quality Product 

Cutting costs by opting for low-quality coatings may save you money now, but it often leads to premature failure, bringing hefty long-term expenses.

How to Avoid:

Use trusted, high-quality products like Globalcote’s range of roof membranes that are specifically formulated to handle Australia’s harsh environmental conditions. They also come with detailed warranties, offering peace of mind.

 

The Right Way to Approach Roof Coating 

Applying a roof coating doesn’t have to be difficult. Here’s a quick overview of best practices to ensure long-lasting results:     

 

Inspect your roof thoroughly 

 

1. 1. Address any underlying issues such as leaks, cracks, or broken tiles.

 

 

Preparation

 

1. 1. 1. Surface Cleaning:
         • • • Importance: Ensure the roof is free of dirt, debris, rust (for metal), and old coatings.
           • Method: high-pressure washer.

   1. 1. Repair Damages:
         • • Action: Fix any leaks, holes, or damaged areas before applying the coating.

   1. Priming:
      • • Purpose: Apply a primer if recommended by the coating manufacturer to enhance adhesion.

 

 

Choose the right product 

 

1. 1. Match your coating product to your roof material.

 

 

Application

 

1. 1. 1. Choose the Right Weather:
         • • Timing: Apply coatings during dry weather with moderate temperatures to ensure proper curing.

   1. 1. Use Quality Tools:
         • • Tools: Invest in high-quality brushes, rollers, or airless sprayers for even application.

   1. 1. Follow Manufacturer’s Guidelines:
         • • Instructions: Adhere strictly to the application instructions provided by the coating manufacturer.

   1. Apply Multiple Coats:
      • • Layers: Apply the recommended number of coats, allowing each layer to dry completely before adding the next.

 

 

Maintenance

 

1. 1. 1. Regular Inspections:
         • • Frequency: Inspect the coated roof periodically for signs of wear or damage.

   1. 1. Reapply Coatings:
         • • Schedule: Reapply the coating as needed based on the manufacturer’s recommendations and the roof’s condition.

   1. Clean the Roof:
      • • Routine: Keep the roof clean to maintain the coating’s effectiveness and appearance.

 

 

Specific Considerations for Tile Roofs  

 

1. 1. Prevent Algae and Mold:
      • • Action: Use coatings that offer protection against algae and mold growth.

 

 

Specific Considerations for Metal Roofs

 

1. 1. 1. Rust Prevention:
         • • Action: Use coatings with rust inhibitors to protect against corrosion.

   1. Thermal Expansion:
      • • Consideration: Choose coatings that can handle the expansion and contraction of metal due to temperature changes.

 

 

Trust the Professionals 

If you’re feeling uncertain about DIY roof coating, it’s worth consulting with a professional. Globalcote has developed a trusted reputation in Australia, supplying high-quality roof coatings that homeowners and professionals alike swear by.

Whether you’re tackling the project yourself or hiring a tradesperson, their range of products offers outstanding performance and durability.

 

Protect and Perfect Your Roof 

Avoiding these common roof coating mistakes can give you a professional-quality result that lasts for years. By following best practices and choosing high-quality products like those offered by Globalcote, you can enjoy a roof that’s not only functional but also adds beauty and value to your home. Partner with Globalcote to enhance your roof’s durability, energy efficiency, and overall performance. Contact Globalcote today to discover the ideal roof coating for your home and experience unrivaled protection that lasts.