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The Clay Bowl Effect: An Unexplored Cause of Foundation Water Problems

The Clay Bowl Effect: An Unexplored Cause of Foundation Water Problems

November 11, 2023

INTRODUCTION

One of the most overlooked complications of construction projects involves a natural process popularly referred to as the Clay Bowl Effect. Although its implication may appear harmless, this procedure could eventually result in profound and significant damage to the foundation of structures. If overlooked, this could significantly compromise the integrity of a building and result in costly repairs. This article seeks to delve into what the Clay Bowl Effect is, how it occurs, and what implications it could have on your property's foundation.

WHAT IS THE CLAY BOWL EFFECT?

The Clay Bowl Effect refers to an artificial water table that forms around a building or structure's foundation. The process begins during the construction stage, specifically when the soil is excavated to create space for the building's foundation. Once the foundation is established, the same excavated soil is used to backfill around the edges of the foundation. No matter how hard the soil is packed, the backfilled soil will always be looser and fluffier than the undisturbed soil around it. This inequality, herein, lays the root of the problem: the creation of a water-collecting clay bowl around your home.

EXPLAINING THE PROCESS

During construction, much of the soil surrounding where the foundation will be is dug out. After the foundation has been laid, the previously removed soil is placed back around the foundation. Herein raises a small but crucial complication: the soil used for backfilling inevitably retains a different compaction rate compared to the soil that remained undisturbed during the construction process.

Consequently, the soil used for backfill is inherently looser and less dense, leading to the creation of a "bowl" – an artificial water table around the home. Some people might wonder, "Isn't this some sort of natural drainage?" Well, the answer is far from it, and here is why.

IMPLICATIONS OF THE CLAY BOWL EFFECT

Because the soil around the home is looser, water will find the path of least resistance and flow toward this backfilled region, making the soil around your foundation a prime target for water collection during rainfall. This unwanted artificial water table increases the hydrostatic pressure on the foundation walls, leading to potential structural damage over time.

Moreover, the backfilled soil's porous nature can hold water longer than expected, exacerbating the problem by expanding when full and exerting extra pressure against the foundation walls. Over time, the increased hydrostatic pressure against the foundation could lead to cracks and leaks, water seepage into basements, and, in severe cases, structural instability.

CONCLUSION

While the Clay Bowl Effect is often overlooked, it is a clear and present danger to the structural stability of our homes, especially in areas prone to heavy rainfall. Understanding the nuances of this phenomenon is paramount for homeowners and developers alike to take appropriate measures in preventing potential water damage to the foundation.

Addressing the Clay Bowl Effect requires a comprehensive approach preferably at the construction stage, by utilizing proper water redirection systems, ensuring improved drainage, and using proper fill soil and compaction techniques. It is advisable to consult a reliable professional with expertise in foundation protection to help deal with this issue and ensure the long-term stability of your home. Remember, understanding and proactive action against the Clay Bowl Effect can save you valuable time and significant costs in future damages.

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