EXAMPLES, EFFECTS, AND CAUSES OF CRAWL
SPACE AND BASEMENT WATER INTRUSIONS
Figure 1. Outside seepage
water entering crawlspace
area from under foundation wall.
Figure 2. Roof downspout leader pulled away from drain pipe, causing roof water to fall, collect and soak into the foundation soil and weaken the footer's ability to support the foundation wall.
Figure 3. Classic example of mildew formed
on heating & A/C ducts (brownish-gray areas) due to high humidity and poor
ventilation. Note insulation falling away from underflooring area because of
Figure 4. Roof water is improperly directed
downspout leader toward foundation wall.
Figure 5. Temporary use of corrugated plastic drainage pipe carry roof water away from foundation wall to several downspout leaders.