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How thick should the layer of aggregate base under a standard concrete driveway be?

0-2 inches
2-4 inches
4-6 inches
Not sure
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Question: How thick should the layer of aggregate base under a standard concrete driveway be?
Top Answer (47% of 34 votes): 2-4 inches.

Answer: 2-4 inches
Explanation: That depends largely on the subgrade materials, and traffic serviced by the driveway, but on stiff clay soils, 2-4" of aggregate base is typically adequate to bridge irregularities and produce a smooth, friction minimized subgrade.
Maven Group LLC
Answer: 2-4 inches
Explanation: Depending on soil base for proper compaction and drainage.
BAT Concrete llc
Answer: 4-6 inches
Explanation: The gravel base for a driveway should be a minimum of 4 inches deep. If heavier vehicles, such as large trucks, will use the driveway regularly, the gravel should be even deeper, up to 12 inches. Poor soil or a sloped driveway may also require deeper gravel. In general, the thicker the gravel base, the more weight the driveway will be able to handle without damage to the concrete. The gravel should be clean, free of sand or clay and fairly uniform in size and shape without any large stones. It should also compact easily and be evenly compacted before the concrete is poured to provide strength and stability. Recycled gravel is suitable for use beneath a concrete driveway as long as it is clean and uniform.
Colorado Concrete
Answer: 4-6 inches
Explanation: The base that the concrete is placed on should be compacted and is very important , as this is what supports the concrete.
Concrete services
Answer: 4-6 inches
Explanation: To allow for proper drainage. It will not allow what you just said anything concrete which will freeze and crack to concrete.
A to Z Fence and Concrete
Answer: 2-4 inches
Explanation: This all depends on ground quality, drainage issues, etc,
Black Dirt Services LLC
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