What is G5 subbase?

If you are planning to install a new driveway or parking area, the quality of the subbase is an essential element that will determine the durability and longevity of your pavement. One of the most popular subbase materials used in road construction and paving projects is G5 subbase.

G5 subbase parking lot

What is G5 subbase?

G5 subbase, also known as crushed stone, is a granular material composed of crushed rock fragments. It is typically made from limestone or granite, which are known for their high strength and durability. The size of the crushed stones in the G5 subbase varies from 0.075mm to 75mm, depending on the intended use.

The Advantages of G5 subbase

G5 subbase has a number of advantages that make it a popular choice for road construction and paving projects. Some of these advantages include:
  1. Strength and Durability: It is a dense and hard material that can withstand heavy loads, making it ideal for high traffic areas like driveways and parking lots.
  2. Drainage: It has excellent drainage properties that help to prevent waterlogging and the damage it can cause to the pavement.
  3. Cost-Effective: It is an affordable material that provides excellent value for money, particularly when compared to other types of subbase materials.
  4. Versatility: It is suitable for a wide range of applications, from residential driveways to commercial parking lots, making it a versatile and flexible material.

The Installation Process

When installing G5 subbase, there are a few critical steps to follow to ensure optimal results. These include:
  1. Excavation: The area where the subbase will be installed needs to be excavated to the required depth. This depth varies depending on the intended use of the pavement and the local climate.
  2. Grading: The subbase material needs to be graded to ensure that it is level and flat, which is critical for the proper installation of the pavement.
  3. Compaction: The subbase material needs to be compacted to ensure that it is hard and dense. This can be done using a roller or a plate compactor.
  4. Testing: Once the subbase has been installed and compacted, it should be tested to ensure that it meets the required specifications. This can be done by conducting tests for density and moisture content.

Care and Maintenance

Once the It has been installed, it is important to perform regular maintenance to ensure its longevity and performance. This includes regular sweeping and cleaning to remove debris and prevent the buildup of dirt and grime. Any damage to the pavement should be repaired promptly to prevent it from spreading and causing further damage.


In conclusion, G5 subbase is an excellent material for road construction and paving projects. Its strength, durability, and affordability make it an ideal choice for homeowners and contractors alike. If you are planning a paving project, consider G5 subbase as the foundation for a long-lasting, durable pavement.

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