Gap 7 vs. Gap 40: What’s Best for Retaining Walls and Paving?
When it comes to construction and landscaping, choosing the right aggregate material is crucial for ensuring durability and stability. Gap 7 and Gap 40 are two commonly used aggregates in New Zealand, each serving distinct purposes in paving and retaining wall construction. Understanding their differences can help you make the best choice for your project. Understanding Gap 7 and Gap 40 What is Gap 7? Gap 7 is a finely crushed aggregate that is primarily used for bedding layers beneath pavers, pathways, and driveways. It provides a smooth and compact surface that ensures a stable base. This aggregate is known for its excellent compaction properties, making it a popular choice for areas requiring a solid foundation. Gap 7 is particularly useful for: Creating a fine base layer for paving Filling gaps in larger aggregates Enhancing surface stability What is Gap 40? On the other hand, Gap 40 is a larger aggregate, consisting of a mix of crushed stone and fine particles. It is commonly us...