Basement Block Construction

Side view of basement wall

A side view of a common basement block wall you might see in Minneapolis or St. Paul. Typically it's 6'-8' from the drain tile pipe to the grass. The three concrete parts, footing, wall, floor are built at three separate times, footing first, wall second, floor last.


The space between the bottom block going into the floor area is called a "cold joint" meaning wet concrete is layered on dry concrete. This space is notorious for being porous and allowing water to flow through.


Water will enter that central hollow core and when there's enough of it, the pressure of the water column will push the water into the basement floor area.



This is not from a "high water table," it's called "grade level" water. but it looks like it's coming from below the home. Water from a high water table tends to last for weeks, not days.


Drawing of different concrete blocks used for wall construction
By Johnny Lakes June 11, 2026
Some of the different types of blocks used in wall construction from the 1950's
Block foundation wall with crack showing how water can get into the basement
By Johnny Lakes June 11, 2026
Block foundation wall with crack showing how water can get into the basement
Pouring a concrete footing in 1940
By Johnny Lakes June 11, 2026
Historical photo showing a basement wall footing being poured with concrete in 1940
Drawing of rubble basement wall construction
By Johnny Lakes June 11, 2026
Rubble Basement Wall Construction showing how the rock is stacked to build the wall.
Dimple board basement waterproofing
By Johnny Lakes June 11, 2026
Dimple board used inside basement on walls for waterproofing
Finishing mortar joints between cinder blocks
By Johnny Lakes June 11, 2026
Finishing mortar joints between cinder blocks for the best waterproofing
Window well filled with melting snow
By Johnny Lakes February 26, 2026
Melting snow means wet basements in Minnesota.
Clogged yard drain
March 24, 2025
Yard drainage pipe is filled with dirt, rain water is collecting near the home leaving this customer with a wet basement.
Foundation leaking water
By GLWP September 1, 2022
I Have Drain-Tile But I Still Have A Wet Basement!
Vertical crack in poured foundation wall
By GLWP August 26, 2022
Basement Waterproofing Using Above Floor Channels and Dimple Board

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