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Hardcore aggregate plays an essential role in many construction and landscaping projects, forming the unseen but vital layer that keeps surfaces strong, stable and long-lasting. Whether you’re planning to install a new driveway, lay a patio or build a garden path, choosing the right hardcore is key to creating a base that won’t shift, sink or crack over time.
But with so many options available – MOT Type 1, recycled hardcore, quarry hardcore, gravel – how do you know which one is right for your project? In this guide, we’ll explain exactly what hardcore aggregate is, where it’s used, the types you can choose from, and how to select the best one for your needs.
Hardcore aggregate is a strong, heavy-duty material laid as a sub-base beneath roads, driveways, patios, and other hard surfaces. It’s usually made from a mixture of broken stones, crushed concrete, bricks or quarry waste. These materials are chosen because they are durable, do not degrade easily and have low water absorption, meaning they won’t break down or become unstable when exposed to the elements.
The purpose of a hardcore layer is to create a firm, level platform that spreads the weight of the structure above it. Without this base, heavy surfaces like concrete or paving slabs can shift, leading to cracks, unevenness or even structural failure over time. Hardcore is always compacted thoroughly during installation to remove any air pockets and ensure maximum stability.
Hardcore is one of the most widely used base materials in construction, both for domestic projects around the home and for larger commercial or industrial work. Some of the most common uses include:
A good hardcore layer does more than just support weight. It also helps improve drainage by allowing water to flow away from the surface, preventing pooling and reducing the risk of frost damage during colder months.
Not all hardcore is the same, and the type you choose will depend on your project’s needs. Here are the most common options:
This is the most popular type for both domestic and commercial projects. It consists of crushed stone mixed with fines (smaller particles) to ensure excellent compaction. MOT Type 1 is widely used for driveways, patios, road sub-bases and any project requiring a strong, stable foundation.
Made from crushed concrete, tarmac, or brick sourced from demolition waste, recycled hardcore is an environmentally friendly and cost-effective choice. When properly processed and graded, it performs to a similar standard as new materials, making it a great option for many projects, particularly where sustainability is a priority.
Sourced directly from quarry waste materials, this type is often used on larger construction projects or for bulk fill. It may include a range of stone sizes and is ideal for creating a substantial base layer.
Gravel-based hardcore is suitable for areas that require improved drainage, as it allows water to flow through more freely. It is commonly used in landscaping, paths, and lighter-use areas.
The right hardcore depends on what you’re building, how much weight it needs to support, and the ground conditions where it will be laid.
Regardless of the type you choose, always ensure your hardcore layer is laid to the correct depth (often 100–150mm for patios, 150–200mm for driveways) and compacted thoroughly in layers to achieve a firm, level surface.
If you’re planning a project in the Northwest, Everytrade Grabs can supply the hardcore you need quickly and hassle-free. We stock a wide range of hardcore aggregates including MOT Type 1, recycled hardcore, and quarry materials, suitable for everything from garden paths to large-scale construction sites.
Why choose Everytrade Grabs?
Whether you’re a homeowner tackling a DIY project or a contractor working on a commercial job, we can deliver the materials you need, when you need them.
Get in touch today to discuss your project and request a free, no-obligation quote:
With Everytrade Grabs, you can build on a foundation that lasts.