Water damage is a significant threat to buildings under construction, ranking as one of the leading causes of property loss globally. In the U.S., the annual incurred loss from weather and non-weather-related water damage amounts to $500 million, highlighting the substantial financial burden this issue can impose on construction projects.
Understanding the Risk
As buildings are constructed, water can infiltrate through various means such as surface water flooding, uncovered or temporary roof systems, wind-driven rains, water service supply lines, and water drain lines. Recognizing the pervasive nature of water and its ability to exploit any vulnerability underscores the necessity for robust risk management strategies.
Establishing a Job Site Specific Plan
Preventing water damage during construction begins with establishing a job site specific plan. Each project has unique challenges based on its location, topography, construction methods, and intended occupancy. General Contractors or Construction Managers should designate a competent individual to oversee the site-specific plan and ensure sufficient staff and supplies are available to minimize potential losses. Follow these five steps to create your plan:
1. Implement Site Grading and Ground Water Controls
From day one, establish site grading that directs water away from the building. Install engineered storm water drain systems as early as possible and keep drains clear throughout construction using silt fencing and hay bales to prevent blockage. Ensure working pumps are available to remove water from pits, excavations, and other low-lying areas.
2. Protect Materials and Building Systems
Delay the delivery of materials susceptible to water damage, such as drywall, ceiling tiles, and electrical components, until the building is watertight. If early delivery is unavoidable, protect these materials with tarps and keep them off the ground using pallets.
3. Monitor Weather and Plan for Storms
Avoid starting interior finish work on floors with incomplete walls, windows, and roofs. If work must continue, use substantial wind-resistant plastic sheeting and other waterproofing methods. Pay special attention to floor openings like electrical chases or elevator shafts, sealing them or installing temporary dikes to prevent water ingress.
4. Limit Active Water Sources
Keep water sources needed for construction limited to the ground floor to minimize damage from leaks. Pressure test and fully inspect charged water and drain lines before use, and protect pipes from freezing with permanent heating systems where necessary.
5. Install Water Detection Systems
Consider installing water detection or flow alarms in vulnerable areas. These systems can detect water at the floor level and notify you of any leaks, which is crucial for charged systems such as automatic sprinkler systems.
Conduct Regular Inspections
Regardless of weather conditions, it's crucial to perform regular inspections to protect against potential water damage. Ensure windows and doors are closed and temporary tarps or roofs are secured at the end of each workday. Check plumbing for leaks and confirm that all water faucets are shut off. Periodic full inspections of the job site are also recommended.
Best Practice: Shut off water supplies at the main service valves before leaving the project for extended periods, such as weekends or holidays, to ensure peace of mind.
Ask a Loss Control Representative
For more information on mitigating risk, email [email protected] to have your questions answered in a future blog.
By John Holpuch
Reference: Risk & Insurance “Water Damage Is a Leading Cause of Commercial Real Estate Claims. How Sensor Technologies Help Mitigate These Claims,” July 26, 2023.
