When I am doing NJ home inspections, one of the most common water control problems I find is downspouts that dump the water right next to the house. It seems like a small thing. The gutters look fine, the water is going into the downspout, so it must be working. But the truth is, if the water is only traveling a foot or two away from the foundation before it hits the ground, you can be creating a slow and steady problem without even knowing it.
The thing about rainwater is it adds up fast. Even on a light rain, you can have hundreds of gallons coming off a roof in just a couple hours. In a heavy downpour, it is way more than that. If all of that water is soaking into the ground right next to the foundation, the soil stays wet and it can keep that foundation wall damp for days. I have seen this cause water to seep into basements, crawlspaces, and damage sill plates and rim joists over time. In New Jersey, with our clay soils in some areas, the wet and dry cycles can cause the soil to expand and shrink, which can even lead to foundation cracks or movement.
It is not just about water inside the house either. Constant damp soil right next to the house attracts carpenter ants, termites, and other insects. It can grow mold in hidden wall cavities. It can cause that musty smell in a basement that never really goes away. As a NJ home inspector for over 25 years, I can tell you that I have seen homes where the inside looked fine, but the wood framing near the foundation was rotted out because of years of poor drainage from the downspouts.
Fixing it is usually easy and cheap compared to fixing the damage later. Most of the time, you just need to extend the downspout so it ends at least 6 feet away from the house. I like to see solid extensions or underground piping to a safe discharge area. Splash blocks can help if the grading is already correct, but if the yard is flat or slopes toward the house, a splash block is not enough. You are just moving the water a couple feet before it comes back at you.
You also have to think about where the water ends up. I have seen extensions that dump right onto a driveway where it freezes into a skating rink in the winter. I have seen it routed onto a neighbor’s property, which can cause disputes. The goal is to get the water to a safe area where it will drain away and not cause new problems.
If you are buying a home, pay attention to this during the inspection. It is a small detail that can save you from big repairs. In my experience with NJ home inspections, I would say at least half of the water problems I find could have been avoided if the downspouts had been done right in the first place.
So, walk around your house during a rainstorm. See where the downspouts are sending the water. If it is going right down by the foundation, fix it now. You do not need a big budget or a contractor for this one most of the time. Just some common sense and a little bit of work can protect your home for years to come.