The primary functions of a patio base include facilitating underground drainage and supporting the surface material so it doesn t sink.
Pea gravel concrete base.
However a base layer is still a good idea for hard soil since it ll give the patio more structure support and allow for better drainage.
The depth of it the gravel base.
You may just need to dig out and tamp down the area and add 2 to 3 inches of pea gravel over landscape fabric.
Both products are suitable for use as a drainage base for a concrete slab.
Whether you pour concrete for a walkway or patio a strong gravel base is required to prevent the concrete from cracking and shifting.
The directions below will guide you through creating a pea gravel patio with a base layer.
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A layer of gravel placed between the soil and the concrete slab prevents damage from shifting and heaving and increases the weight bearing capacity of the driveway.
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What type of gravel under concrete slab.
The small size of pea gravel rocks prevents large air pockets which reduces the possibility of frost heave damage.