Cracks in pipes, blocked gutters, and broken sewer lines are surprisingly common causes of problems in buildings and structures, often leading to damage to floors, walls, and foundations. Simply put, when soil becomes oversaturated with moisture, the ground weakens and loses its strength, which can result in structural issues.
For homeowners and facility operators, the best way to avoid costly foundation repairs is to regularly inspect the ground around the building for wet, waterlogged, or sunken areas and take immediate action if there is any suspicion of a pipe or drainage leak. It is also recommended to watch for warning signs of foundation and structural problems, such as cracks in interior and exterior walls, uneven floors, and misaligned doors or windows.
When it comes to maintaining water supply, stormwater, and sewer systems, there are several key aspects to consider. Main water supply, stormwater drainage, and sewer networks are separate systems, each designed for different purposes. Sewer pipes are typically smaller in diameter than stormwater pipes, although they can sometimes be of similar size.
Preventing structural problems
For homeowners, it is important to monitor signs of leaking pipes or drainage issues before soil settlement begins to affect the foundation. Watch for slowly draining sinks, toilets, or showers, and make sure that rainwater is not directed beneath the foundation. As an indirect method, check your water bill and pay attention to unusually high consumption.
If a leak is detected, the first priority is to have it repaired by a professional plumber as quickly as possible to prevent further damage before it affects the foundation or other parts of the building.
Signs of water leakage
Obvious leaks are easy to detect visually, so they require little explanation. Hidden leaks, however, may show no visible signs, as water can slowly seep into the ground. In some cases, leakage may continue for a long time before any structural problems become apparent. That is why regular inspections of engineering systems are essential, both visually and with specialized equipment, often involving qualified professionals.
Common causes of pipe leakage. There are several external factors that can lead to cracks and leaks in pipes, such as invasive tree roots, stormwater overflow during heavy or prolonged rainfall, or the presence of old corroded pipes.
Intrusive tree roots
Tree roots can enter pipes through tiny cracks or small gaps in search of water, especially during dry periods. Once inside, they continue to grow, damaging pipes and causing blockages. Tip: study the root system of trees and plant them at an appropriate distance from foundations, access routes, pavements, and walkways. A geotechnical specialist or structural engineer can provide proper guidance on tree placement.
Old corroded pipes. While PVC and plastic pipes have been widely used for over 40 years, many older buildings still have metal pipes that are prone to corrosion, leaks at joint connections, and relatively rapid deterioration over time. Eventually, holes and cracks form, leading to pipe failure. Rusted pipes are also especially vulnerable to root intrusion. Tip: consult a licensed plumber to assess the current condition of the pipes on your property.
Stormwater overflow
In wet conditions, rainwater can overwhelm stormwater systems and overflow into sewer systems (if such connections exist), leading to overload, accumulation, and potential flooding or soil washout. Overloaded drainage systems can also cause excessive soil erosion, leading to water accumulation in the foundation soil and resulting in structural problems. Tip: ensure that stormwater pipes are clean and do not continuously discharge roof runoff into the sewer system—or worse, beneath the foundation—and that your drainage system is regularly maintained to prevent overload and overflow.