Before any asphalt or bitumen surface is laid, proper groundwork is crucial — and grading is one of the most important steps. Without accurate grading, even the highest-quality surfacing materials can fail prematurely. At Lara Road Tech in Lara, VIC, we place a strong emphasis on grading because it forms the foundation of long-term durability and surface performance.
Here are nine facts that highlight why grading should never be overlooked before surfacing work begins.
Grading Directly Impacts Drainage
Incorrect grading often results in pooling water, which can seep into sublayers and weaken the structure. Proper grading ensures surface runoff is directed away from the finished area, protecting it from moisture damage.
Uneven Subgrades Can Lead to Premature Surface Failure
If the base beneath the surface isn’t uniformly graded, it causes weak points. These areas bear more weight, which can lead to cracking, rutting, or potholes far sooner than expected.
Smooth Grading Results in a Uniform Finish
One of the key benefits of accurate grading is that it helps achieve a smooth and visually consistent final surface. Whether it’s for roads, car parks, or driveways, a well-graded base ensures that the top layer is even and aesthetically clean.
Proper Grading Reduces Long-Term Maintenance Costs
When grading is done correctly at the start, it reduces the likelihood of subsurface failure. That means fewer patch-ups, rework, or costly repairs over the surface’s lifetime.
Grading Ensures Optimal Load Distribution
Vehicles and machinery place heavy loads on surfaced areas. Grading helps distribute this load evenly across the surface, minimising stress concentrations that could lead to deformation or cracking.
Helps Achieve Accurate Thickness of Surface Materials
Surface layers like asphalt or bitumen are designed to be laid at precise thicknesses. Uneven ground interferes with this. Grading helps maintain consistent material depth, which is essential for strength and longevity.
Grading Makes Compaction More Effective
Compacting materials like road base or sub-base is only truly effective when the grading has been done well. Without even levels, compaction equipment cannot operate efficiently, leading to loose or unstable zones beneath the surface.
It’s Essential for Compliance and Safety
In infrastructure projects, local councils and private developments often have compliance guidelines. Proper grading supports drainage, safety, and slope requirements, reducing the risk of legal or regulatory issues down the track.
Grading Supports Better Bonding Between Layers
When asphalt or spray seal is applied, it must bind well with the layer beneath it. A smooth, well-graded base promotes strong adhesion, improving performance and reducing the risk of layer separation.
Conclusion
Grading isn’t just a background task — it’s the starting point of a successful surfacing project. Whether you’re dealing with car parks, driveways, access roads, or large-scale infrastructure, ignoring this critical step can cost you time, money, and performance in the long run.
At Lara Road Tech in Lara, VIC, we understand the importance of precision grading and always prioritise ground preparation before any surfacing begins. If you want your project to last, start with the right foundation — get in touch with our team today to discuss your requirements.
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