Structural Drying & Dehumidification in Boulder, CO

Because the distribution matters far more than the average. This location sits at the mouth of a steep canyon draining a large mountain area, and an upslope system can stall against the range and deliver a substantial fraction of the annual total in a day or two. That water arrives concentrated through the canyon. The annual figure describes a semi-arid climate and tells you almost nothing about the size of the event that eventually arrives.

More than in most climates, because of the soil. Front Range claystone swells when wetted, and foundations here are built on the assumption that the backfill stays relatively dry. Repeatedly wetting the soil next to a wall with roof runoff drives movement that shows up as cracks and stuck doors years later. Extending discharges well away from the foundation is one of the highest-value low-cost actions available on this ground.

That is a common sequence and the two events are connected even though they are weeks apart. Hail can bruise or fracture a roof covering without opening it visibly, and the next significant rain finds the weakened area. Because the damage appears later, it often gets treated as a separate roof failure. Having a roof inspected after a hail event, rather than waiting for an interior symptom, prevents most of the resulting interior work.