Depth of foundation

Interior · Wet Basements and Crawlspaces · printed page 371 (PDF page 372)

Book index entries

Depth of Foundation Foundation – Depth Basement – Wet Crawlspace – Wet Wet Basement – and Crawlspaces Wet Crawlspaces and Basements

Text in the illustration

floor framing
floor/foundation are unaffected
deeper foundation more likely to have problems
foundation damage
water table
water pressure/freezing pressure
perimeter drainage tile
water penetration
heaving
cross section

Generated explanation

The cross section compares shallow and deep concrete foundations supporting wood floor framing, with a water table below the shallow footing but above the deeper footing and slab. Both foundations have perimeter drainage tile beside their footings in granular bedding. The shallow floor and foundation are labeled as unaffected. At the deeper foundation, an arrow indicates water pressure/freezing pressure against the wall, where foundation damage is shown. Curved arrows indicate water penetration at the wall–floor junction and heaving of the cracked floor slab.

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