Issue link: https://hi.iaq.net/i/248503
www.epa.gov/iaq/moisture Foundation Maintenance Issue Guidance 2: Inspect the interior of the foundation. • Inspect the foundation for changes in existing cracks and for new cracks that might indicate water problems. Rainwater and snowmelt can cause unwanted moisture intrusion through the foundation of a building. Foundations are vulnerable to chronic moisture problems from rainwater, ground water, plumbing leaks, and condensation. Regular inspection, particularly of areas not ordinarily occupied, is critical to reduce the risk of serious damage to the foundation and the risk of adverse health effects to the occupants. • Check the condition and operation of the sump crock, drains and pump. • Look for signs of seepage or wicking (e.g., water stains, damp materials, efflorescence, peeling paint or mold growth) on foundation materials and interior finishes. • Check for musty odors. Goals • Look for swollen, warped or moldy wooden materials. Foundation Drainage Goal 1: Foundation drainage systems divert water away from the structure. • Determine the temperature and relative humidity. Record the date, time and operation of mechanical systems, the temperature and the relative humidity. Guidance Foundation Drainage Goal 1: Foundation drainage systems divert all water away from the structure. • Look for stained carpet, sheet or vinyl composition tile (VCT) floors with blisters and for bubbles indicating adhesive failures as well as adhesives oozing from joints between tile. Guidance 1: Inspect the exterior of the foundation and the surrounding landscape. • Look for condensation on pipes, tanks, toilets, pumps, ducts, walls and floors. • Check whether the surrounding landscape diverts water away from the building envelope. Note any soil settlement or pooled rainwater. Verification of Foundation Maintenance • Check the condition of roof drain leaders. • Document inspections and responses using a checklist and work order system. • Inspect the foundation for changes in existing cracks and for new cracks that might indicate water problems. • Inspect the intersection and slope of sidewalks, patios and pavements with the adjoining building for potential seepage. • Look for newly sprouted or planted trees near drain lines. Remove or prune as needed. • Check exterior plumbing fixtures, hoses and irrigation lines for leaks. • Conduct inspections semi-annually and after heavy rains or rapid melting of snow. 92