Crawl Space Support Columns: A Common Structural Detail That Deserves a Closer Look

In crawl spaces like this, one of the main things I am looking at is how the girder is being supported below. In many homes, especially older homes, cottages, and seasonal properties around lakes, rivers, and coastal areas in New England, that support often comes from simple concrete block column systems. They may look basic, but they are doing serious structural work.

These columns are part of the home’s vertical load path. They help carry loads from the floor framing and girder above down to the footing and soil below. When they are built properly, plumb, adequately supported, and bearing on proper footings, they can do their job. When they are not, the result can be sagging floors, movement, unstable framing conditions, or improvised repairs over time.

This is one of those areas where attention to detail matters. In older crawl spaces, especially in damp or water-adjacent environments, it is not unusual to find crude block supports, poor bearing, settlement, shifting, rot nearby, or signs that the support system has been altered over the years. That does not automatically mean the house is failing, but it does mean the support system deserves a careful look.

For an inspector, these supports help tell the story of how the structure is performing. Column material, alignment, bearing conditions, spacing, and connection details all matter when trying to understand what may be contributing to uneven or sagging floors above.

It is not the prettiest part of the house, but it is one of the parts doing some of the most important work.

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