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Why is Water Intrusion Common During Colorado’s Freeze-thaw Cycles?

Water intrusion is common during Colorado’s seasonal weather extremes, particularly during freeze-thaw cycles and rapid spring snowmelt, due to the following factors:

  • Expansive Clay Soils: The Pikes Peak region is characterized by clay-rich soils that swell when wet and shrink when dry. This constant movement creates persistent hydrostatic pressure against foundation walls.
  • Hydrostatic Pressure: During rapid snowmelt, the ground becomes saturated quickly. This creates intense pressure that forces water toward the foundation, where it finds its way through floor joints, porous concrete, and cracks.
  • Frost Heave: Without dedicated drainage, the combination of moisture and freezing temperatures can cause frost heave, which compromises structures like egress windows and foundation walls, leading to leaks and structural damage.
  • Soil Absorption Limits: Intense bursts of moisture from snowmelt or monsoon rains often occur faster than the soil can absorb them, resulting in water pushing against the basement walls.

To mitigate these issues, homeowners often utilize interior perimeter drain systems to relieve hydrostatic pressure and exterior French drains to intercept water before it reaches the foundation.


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