5 Drainage Issues that Lead to Basement Flooding in Colorado

1. Missing gutters to catch and carry away water from entering the basement or crawlspace.  

Gutters are an important first line of defense to carry rain and melt waters from the peak of the roof past the perimeter of the home.  Sheets of water falling directly from the roof to the foundation can cause the surrounding soil to subside toward the home.  This means that the entire slope of the land is affected.  

2.  Missing downspouts leading to pooling near foundation walls.  

Downspouts are essential to directing water far enough away from the home to keep the concrete foundation from wicking the water inside the basement or crawlspace.  Any time that you notice pooling or puddling of rainwater near the foundation, it is important to return the soil to level condition and prevent water from resting in a pool.  If the cause is a missing downspout, then the problem will continue until you replace that downspout.  Each day that you wait will allow further moisture penetration into your basement and a greater risk for mold to develop on your subfloor.

3. Concrete walkways or patios that have settled and are sloping towards the foundation.

Patios and walkways become fast flowing streams in rainy conditions.  These slabs should direct water away from your foundation walls through subtle grade alterations.  Unfortunately, concrete is heavy and the soil underneath it can subside over time, especially where a slab meets concrete steps.  This area has more weight pressing on the soil, so it subsides first.  When you notice that your patios and sidewalks are directly water toward your home, it is a good idea to have the concrete re-leveled and/or replaced.  This is generally done through mudjacking.

4. Landscaping that is planted within 3 feet of foundation walls.

Planting bushes and flowers around the foundation generally seems harmless, but it can actually contribute to the flooding in your basement.  Plant roots are tenacious and will grow down toward cool, moist soil.  This soil exists closest to your concrete foundation walls.  As you water your landscaping, the roots draw that moisture towards your foundation and create paths for water intrusion.

5.   Downspouts that are not extended far enough from your foundation walls.

Downspouts should extend 6' from your foundation to prevent back flow during Colorado's heavy afternoon rains.  If the downspouts are less than 6', you will experience back flow that can flood your basement.