Permeable Paving is the modern type of paving which allows the water to run off inside the earth and help to increase the water level, so this type asphalt is eco-friendly for our earth. We have some relative product to making paving easily such as E30, E-40, E50. You can visit http://geosyntheticsystems.ca/landscaping-specialties/ for more details or call us at (613)733-9585.