Specifications

• Installed cost less than PICPs on unimpeded stormwater flow
• Improved water quality and groundwater recharge
• No surface or joint cleaning
• Unbreakable
• ADA compliance
• Ease of handling and installation
• Not susceptible to the effects of freeze and thaw cycles

An infiltration rate of 420 in/hr (ASTM C 1701) means Terrewalks® receives more water flow than other pervious systems, and exceeds typical rainfall quantities even in the wettest climates.

Terrewalks® built-in reservoirs store 2.3 gallons of water per paver so water will slowly percolate through the base layer to the native soil below. Due to saturation or slow absorption of native soils, flow without storage results in run-off — even if pavement has infiltration. Terrewalks® hold overflow and prevent storm water run-off.

Sediment and silt are filtered by non woven pervious geotextile and permeable aggregate base which recharges local groundwater.

Unlike PICPs and pervious concrete which require periodic cleaning and vacuuming, Terrewalks® seams are open and smooth, allowing debris and sediment to flow through or naturally wash out.

Terrewalks® comply with ADA design guidelines by providing a firm, stable and slip resistant walking surface, with seams not exceeding 1/2 inch.