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Industry Professionals Say
“Entering a parking lot should be the beginning of a pleasant experience when you arrive at a site and/or building. Parking lots should be ‘parking gardens’ with trees, other vegetation, color, texture and variety. Besides creating a sustainable drainage system that supports plants, permeable interlocking concrete pavement improves the character of parking area, thereby supporting the parking garden idea.”
“From day one, the Board wanted a permeable lot, a view heightened by the long-term drought in the southeast which drastically lowered lake levels and threatened drinking water supplies. They visited pervious concrete and permeable interlocking concrete pavement projects in the region. This raised everyone’s confidence in these types of systems. The board went with PICP because of easy repairs and a better looking surface.”
Permeable Pavers
What is Permeable Interlocking Pavement?
Permeable pavement cross section
Permeable interlocking concrete pavement (PICP) is comprised of a layer of concrete pavers separated by joints filled with small stones. Water enters joints between solid concrete pavers and flows through an "open-graded" base, i.e. crushed stone layers with no small or fine particles. The void spaces among the crushed stones store water and infiltrate it back into the soil subgrade. The stones in the joints provide 100% surface permeability and the base filters stormwater and reduces pollutants.
Have a question about permeable interlocking concrete pavements?
View Permeable Pavement FAQ
Additional Resources
- Permeable Pavement Fact Sheets Created by the Low Impact Development Center and ICPI, are aimed at design professionals, developers, municipalities and schools/universities. Each 4-page, color brochure introduces PICP, advantages and how each meets the needs of each audience. These are great leave-behind publications for presentations to specific audiences. Click on the links below to view a PDF version. ICPI members may purchase bulk quantities through the online publications catalog.
- PICP Project Profiles & Comparison Brochure
The project profiles brochure is focused on permeable interlocking concrete pavement use in various project in different areas of North America.The comparison brochure compares permeable interlocking concrete pavement to other types of pavements.
| PICP Comparison |
FREE
On-line Course for Design Professionals - Fundamentals of Permeable Interlocking
Concrete
Pavement - This engaging presentation on PICP provides an overview of
permeable interlocking concrete pavements, covering selection, project examples,
design, specification, construction and maintenance. LEED® credits, ADA
compliance and project cost estimates are also covered. Earn one AIA, ASLA or
CE Professional Development Hour (PDH).
PICP Construction and Maintenance Checklist
A PICP inspector’s guide for project construction and maintenance written to a municipal inspector
Model Stormwater Ordinance for Permeable Interlocking Concrete Pavements
Gives local governments a head start in the development of a stormwater ordinance that includes PICP. The ordinance should be adjusted to local conditions.







