In recent years, permeable pavements have emerged as an innovative solution to a major urban
problem: managing stormwater runoff. Unlike traditional pavements, which don’t let water pass
through and can lead to flooding, permeable pavements allow rainwater to seep through and be
absorbed into the ground. Let’s explore the different types of permeable pavements, their
benefits, and how they contribute to more sustainable cities.

What Are Permeable Pavements?

Permeable pavements are designed to let rainwater pass through the surface and into an
underlying layer of stone. This process helps capture and slow down stormwater, reducing
runoff.

There are three main components of these systems:

1. Surface Layer: The top part of the pavement that lets water seep through.
2. Stone Aggregate Layer: The layer below the surface that temporarily holds the water.
3. Filter Layer: Positioned under the stone layer to remove sediments and prevent clogging.

Types of Permeable Pavements

1. Permeable Grid Pavers: These are grid-like structures made from plastic or wire mesh, filled
with soil or gravel. They are suitable for low-traffic areas and support vegetation. Below the grid
is a layer of clean stone to manage water.
2. Porous Asphalt and Concrete: Made with a special mix that creates a porous surface, these
materials allow water to flow through. They work well in both low- and high-traffic areas and are
supported by a layer of clean gravel and stone.
3. Permeable Interlocking Paver: These pavers have joints filled with gravel. They are laid on a
gravel filter layer and supported by a stone reservoir. They handle heavy traffic and offer a
range of design options.

Benefits of Permeable Pavements

1. Reduction in Stormwater Runoff: By letting water infiltrate through the pavement, these
systems reduce the amount of runoff and lessen the risk of flooding.
2. Improved Water Quality: Permeable pavements filter out pollutants and sediments from
stormwater, leading to cleaner water that replenishes groundwater.
3. Temperature Regulation: They help cool surface temperatures, mitigating the urban heat
island effect and contributing to cooler city environments.
4. Enhanced Aesthetic Appeal: With various design choices available, permeable pavements
can improve the look of both residential and commercial spaces.

5. Sustainable Urban Development: By reducing impervious surfaces and encouraging natural water flow, permeable pavements support green infrastructure and sustainable urban growth.
Financial Incentives for Permeable Pavements in Virginia

Installing permeable pavements can also be financially beneficial. Programs offered by Soil and
Water Conservation Districts (SWCD) may help cover installation costs. For example, some
programs reimburse up to $14.00 per square foot of permeable pavement, with a maximum
payment of $20,000.00. This makes it more affordable for property owners and developers to
use these sustainable solutions.

Permeable pavements provide a practical and eco-friendly way to manage stormwater in urban
areas. Whether using grid pavers, porous asphalt, or interlocking pavers, these systems help
reduce runoff, improve water quality, and support sustainable development. They not only
benefit the environment but can also be supported by financial incentives, making them a
valuable investment for a greener and more resilient future.

Contact us to answer any of your questions!