Differences Between Porous Asphalt & Standard Asphalt

Grand Rapids Porous Asphalt Paving

More and more commercial property owners are investing in porous asphalt pavements for stormwater management. Like the name suggests, porous asphalt is filled with pores that allow water to seep through asphalt pavement and enter the soil where it can be filtered of contaminants.

Porous asphalt was designed to mimic the way soil filters stormwater before it flows into waterways, which is better for humans and the environment.

In this blog post, we will be going over the differences between permeable paving and standard asphalt so you can make an informed decision for your commercial parking lot.

Storm Water Management

When water is unable to soak into the ground, it flows across the surface until it reaches a sewer system or waterway. One of the biggest differences between porous asphalt and standard asphalt is stormwater management, which affects water quality and flooding.

When it rains, water seeps into the soil where it is filtered of contaminants. However, urban areas that feature parking lots, driveways, roads, and rooftops, make it difficult for water to seep into the soil. As a result, the amount of stormwater runoff increases significantly and can even cause flooding. Porous asphalt reduces how much water goes into storm sewers while replenishing water tables.

Standard asphalt is a hard surface, which means stormwater is unable to penetrate. While this is great for the lifespan of asphalt parking lots, it may not be good news for the environment. Runoff from asphalt surfaces picks up contaminants along the way and doesn’t get filtered through the soil the way nature intended. Porous asphalt parking lots, on the other hand, have been shown to filter out contaminants like solids, grease, and oil.


The average lifespan of asphalt parking lots is 20 years. However, porous asphalt parking lots have been known to last longer. Perhaps one of the best examples of porous parking lots is located outside the Walden Pond State Reservation in Massachusetts. While the porous parking lot was installed in 1977, it still remains in good condition. One of the most common causes of standard pavement damage is water infiltration. Since porous pavements are designed to filter water, this isn’t a problem.


Porous asphalt costs more to install than standard asphalt because it requires a stone recharge bed underneath the surface layer. However, the cost of porous asphalt must be compared with alternatives before determining the final cost. For example, if you were planning on needing a detention basin to handle stormwater runoff, the cost of porous asphalt installation is less expensive. An asphalt paving contractor can help you determine if the porous pavement is the right choice for your property.

The Grand Rapids asphalt paving contractors at A-1 Asphalt Inc. always strive to make sure you are completely satisfied with your new asphalt paved surface. If you are interested in porous asphalt installation or our other asphalt paving services, be sure to give us a call at (800) 871-4401.