Landscapers love underground downspouts. Homeowners love them. They look sleek, hide ugly pipes, and eliminate trip hazards.
But in our line of work? Buried downspouts are often the ultimate secret agents of concrete destruction.
Whether the pipes collapse, get clogged with debris, or lose their escape route to later landscaping projects, the result is always the same. Homeowners first notice the symptom before they realize the problem.
The Symptom
A gap appears between the home’s downspout and the underground drain pipe; when they used to be connected. This isn’t a gutter installation failure—it’s a ground settlement warning sign. Sometimes these downspouts are buried under concrete patios & porches. When the downspouts are buried under settling concrete sinking concrete slabs, it drags the underground drainage pipe down with it, pulling it completely away from the main gutter system.
When a downspout disconnects like this, rainwater no longer flows safely away from your home. Instead, every Colorado thunderstorm pours water directly onto the sunken slab and right next to your home’s foundation. This creates a vicious cycle: more water erodes the soil underneath, causing the patio to sink even further, while simultaneously risking expensive foundation damage or a flooded basement.
The Danger
When a downspout disconnects like this, rainwater no longer flows safely away from your home. Instead, every Colorado thunderstorm pours water directly onto the sunken slab and right next to your home’s foundation. This creates a vicious cycle: more water erodes the soil underneath, causing the patio to sink even further, while simultaneously risking expensive foundation damage or a flooded basement.
The Solution
Installing a longer pipe extension on this is just a band-aid. To fix the root cause, the concrete needs to be lifted back to its original position.
At Colorado Concrete Leveling, we inject eco-friendly polyurethane foam beneath the slab. This gently lifts the patio back to its exact original height, perfectly reconnecting the downspout system and sealing the soil underneath against future erosion.
