Interior drainage system

Interior · Wet Basements and Crawlspaces · printed page 372 (PDF page 373)

Book index entries

Basement – Interior Drainage System Interior Drainage System for Leaky Basements Wet Basement – Interior Drainage System Basement – Wet Crawlspace – Wet Wet Basement – and Crawlspaces Wet Crawlspaces and Basements

Text in the illustration

water
hole drilled in block
1/2" gap
patched concrete
gravel
new interior drainage tile
cross section
water flow
a drainage layer is sometimes added behind wall finishes and/or below the subfloor
wall finish
concrete block foundation
sump pump
sump

Generated explanation

The cross section illustrates an interior basement drainage system along a concrete block foundation. An enlarged detail shows water draining through a hole drilled in the block and a 1/2-inch gap at the edge of the patched concrete floor into gravel surrounding new interior drainage tile. The drainage pipe conveys water to a sump containing a sump pump and an upward discharge pipe. A second enlarged detail shows an optional drainage layer behind the wall finish, with arrows indicating downward water flow; its annotation also notes possible placement below the subfloor.

Components

concrete block foundation foundation footing concrete floor slab patched concrete floor block drainage hole perimeter drainage gap interior drainage tile gravel drainage bed drainage layer wall finish sump sump pump sump discharge pipe

Materials

concrete block concrete gravel

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