Which method is described for reducing water intrusion into tilt-up panels?

• A. Blowing out any openings in the panel
• B. Sealing all joints with epoxy
• C. Installing external drainage channels
• D. Coating the panel surface with waterproof paint

Answer: (A)

Reducing water intrusion hinges on managing openings and drainage paths in tilt-up panels. When a panel has openings or voids, water can seep in through those passages, especially during rain or when hydrostatic pressure is present. Blowing out openings with compressed air helps remove moisture, debris, and any other obstructions and keeps these passages clear for drainage. By ensuring openings stay open and free of material buildup, water is more likely to escape rather than become trapped inside the panel, which directly lowers the risk of intrusion.

Other methods exist and are helpful in their own right—sealing joints with epoxy helps with sealing gaps, installing external drainage channels directs water away from the panel, and coating the surface with waterproof paint adds a moisture barrier. But if openings are blocked or left unaddressed, water can still find a way into the panel. Keeping openings clear addresses the intrusion pathway at its source.