Step-by-Step Guide to Installing Pavers on an Open Grade Base
When it comes to building a durable, long-lasting patio or walkway, the foundation matters just as much as the pavers themselves. One of the most effective and modern installation methods is the open grade base system. Unlike traditional sand-set methods, this approach improves drainage, reduces shifting, and increases longevity—especially in areas with heavy rainfall.
Here’s a step-by-step breakdown of how we install pavers using an open grade base.
Step 1: Plan and Mark the Area
Start by outlining the project area using marking paint or stakes and string lines. This ensures clean edges and proper layout before any digging begins. Take time here to plan slopes for drainage—water should always flow away from structures.
Step 2: Excavate the Site
Excavate the area to the proper depth, typically:
8–12 inches for patios and walkways
10–14 inches for driveways
Depth depends on soil conditions and expected load. Remove all organic material, roots, and debris to prevent settling later.
Step 3: Install Geotextile Fabric
Lay down a high-quality geotextile fabric over the excavated soil. This layer separates the soil from the base material, preventing contamination and improving long-term stability.
Step 4: Build the Open Grade Base
Instead of traditional crushed limestone with fines, use clean, angular stone (typically ¾” washed gravel).
Install in lifts of 2–4 inches
Compact each layer thoroughly using a plate compactor
This open-graded stone allows water to pass through easily, reducing hydrostatic pressure and preventing washout.
Step 5: Install Edge Restraints
Secure edge restraints around the perimeter of the project. This locks the pavers in place and prevents spreading over time. Make sure they are firmly anchored into the base.
Step 6: Screed the Bedding Layer
Add a 1-inch layer of smaller clean stone (commonly ⅛” or ¼” chip stone). Screed this layer smooth and level—this is what your pavers will sit on.
Unlike sand, this bedding layer won’t wash away or shift with water movement.
Step 7: Lay the Pavers
Begin placing pavers in your desired pattern, working from a straight edge or corner. Keep joints consistent and avoid stepping on the screeded bedding layer as much as possible.
Cut pavers as needed to fit edges and curves.
Step 8: Install Joint Material
Sweep a polymeric sand or fine joint stone into the joints between pavers. Compact using a compactor to ensure joints are fully filled.
If using polymeric sand, follow with a light mist of water to activate it.
Step 9: Final Inspection and Cleanup
Check for any uneven areas, ensure joints are filled properly, and clean off excess material. Your new paver surface is now ready to enjoy.
Why Choose an Open Grade Base?
Superior drainage – prevents water buildup and erosion
Longer lifespan – less movement and settling over time
Stronger performance – ideal for wet climates and heavy use
Reduced maintenance – fewer issues with washout or sinking
Final Thoughts
Installing pavers the right way is what separates a project that lasts 2–3 years from one that lasts decades. An open grade base system is one of the best investments you can make in your hardscape project—especially in regions with heavy rain and shifting soils.
If you’re considering a patio, walkway, or driveway upgrade, make sure your contractor is using the right foundation—not just focusing on the surface.
