How much aggregate needs to go above the product and below concrete in a basement?

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How much aggregate needs to go above the product and below concrete in a basement?

How much aggregate needs to go above the product and below concrete in a basement?

A minimum of 2” of sand or pea gravel should be placed above the drainage bundle to provide a suitable base for the concrete. The basement drain lines should daylight to a sump or some other form of discharge. Note; this is only for non-load bearing applications.