It may be made up of a variety of materials, but it’s usually composed of a mix of ¼” -10 crushed gravel or washed concrete sand that will hold the pavers in place. The top layer is known as the bedding course. This layer is compacted in several lifts and establishes the foundation for the bedding layer. In some specialty applications, other aggregates are used, such as 3″ crush or ¾”open. The base course, which is the next layer, is typically made up of ¾” -0 crushed gravel. The bottom level is the sub-base, composed of compacted soil beneath the installation site. The support system under pavers consists of three levels: sub-base, base, and bed. So, let’s break down what comprises a paver base. Lastly, the depth of your base depends on the kind of base you’re going to install. This ensures stability under the weight of traffic and whatever will be placed on top of them.
However, if you’re installing pavers over an existing lawn or garden, you’ll need to dig down at least 7” so that the new surface will be level with the surrounding ground.
If you’re installing pavers over an old concrete patio or foundation, you won’t need to dig at all. The amount of digging you’ll have to do for your pavers is determined by the type of surface you’re covering, the volume of traffic you anticipate the pavers receiving, and the kind of base you plan to install. The best way to avoid this is to first properly excavate your patio area. Without an appropriate base, pavers can sink, shift, or crack over time. One of the most common problems people run into with their pavers is failing to first secure a deep, well-constructed base. For the long answer, and to see the exact depths required for specific types of home projects, keep reading. That’s why you’ll need to excavate 7–13” below the finished grade, depending on the type of traffic you expect the pavers to receive. The short answer is that your paver project will only last as long as your base is deep. You’re here because you have an upcoming paver project and want to know how deep you need to dig for it to stand the test of time.
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