A well-built paver patio or walkway can last 20 to 30 years with minimal maintenance, add serious curb appeal, and is one of the few hardscape projects that a patient DIYer can complete over a long weekend. The secret to longevity is almost entirely in the base preparation. The pavers themselves are almost secondary. This guide covers layout planning, material estimation, base construction, and the installation steps that separate a patio that lasts from one that shifts and settles within a few seasons.
Before purchasing anything, sketch your patio or walkway to scale on graph paper. Note the dimensions, any changes in grade, proximity to the house foundation, and where water drains. A patio should slope away from the house at a rate of 1/8 inch per foot to direct water runoff away from the foundation. For a 12-foot-deep patio, that means the far edge should be 1.5 inches lower than the edge against the house. A walkway should be at least 36 inches wide for comfortable single-file walking; 48 to 60 inches allows two people to walk side by side.
Running bond (offset rows, like brickwork) is the simplest pattern to install and wastes the least material. Herringbone (pavers set at 45 or 90 degrees to each other in a zigzag) is the strongest interlocking pattern and the best choice for driveways or areas with vehicle traffic, but it requires more cuts along the edges. Basketweave and circular patterns are decorative choices that require more planning. For beginners, running bond is the most forgiving starting point.
A standard paver installation consists of four layers from bottom to top: compacted native soil, a compacted gravel base, a sand setting bed, and the pavers themselves. Each layer has a specific depth requirement.
The gravel base is the most critical part of the installation. Use crushed angular gravel (also called processed gravel or road base), not rounded pea gravel, which does not compact properly. For a foot-traffic patio, compact 6 inches of gravel. For a driveway, use 8 to 12 inches. To calculate how many tons you need: multiply the area in square feet by the depth in feet (6 inches = 0.5 feet), then multiply by 100 (the approximate pounds per cubic foot of compacted gravel) and divide by 2,000 to convert to tons. For a 200-square-foot patio: 200 x 0.5 x 100 / 2,000 = 5 tons.
Coarse concrete sand (not play sand or fine masonry sand) forms the 1-inch setting bed that allows you to make fine adjustments to paver level. To calculate cubic yards of sand: multiply square footage by 0.083 feet (1 inch) and divide by 27. For 200 square feet: 200 x 0.083 / 27 = 0.6 cubic yards, or roughly three-quarters of a ton of sand.
Calculate paver quantity by dividing your total area in square feet by the coverage per paver, then add 10 percent for cuts and breakage (15 percent for herringbone or diagonal patterns). Standard 4x8-inch pavers cover 0.22 square feet each, so a 200-square-foot patio needs roughly 1,000 pavers before the waste factor. Most suppliers price pavers per square foot. Confirm coverage per unit when ordering.
Mark the patio outline with spray paint or stakes and string. Excavate to the correct depth: paver thickness plus 1 inch of sand plus 6 inches of gravel, typically 9 to 10 inches total for standard 2.375-inch-thick pavers. Slope the excavation to match your desired finished grade. Compact the native soil with a plate compactor before adding base material. Add gravel in 2-inch lifts, compacting each lift before adding the next. Do not dump all the gravel in and compact once. Layered compaction produces a much more stable base. After the final gravel lift is compacted, check for flatness with a long level or straightedge.
Screed the sand bed smooth using two pipes of equal diameter as rails and a straight 2x4 dragged across them. The rails set the final grade and the screed produces a perfectly flat, 1-inch-deep sand bed. Remove the rails carefully and fill the channels with loose sand. Set the pavers from one corner, pressing each one firmly into the sand. Use edge restraints (plastic or aluminum) to hold the perimeter in place before the sand joints are filled. Once all pavers are set, run the plate compactor over the entire surface to seat the pavers firmly into the sand. Sweep dry polymeric sand into the joints, compact again, sweep again, and mist the surface lightly with water to activate the polymer binder.
Regular sand can wash out of joints during heavy rain and encourages weed growth and ant colonization. Polymeric sand contains a binder that hardens when wet and locks the sand in place. It significantly reduces weed penetration and the ant problem. It costs more, typically $25 to $40 per 50-pound bag versus a few dollars for regular coarse sand, but for most patios and walkways the performance difference is worth it. Make sure all pavers are completely dry and that there is no rain forecast for 24 hours before applying polymeric sand, and follow the manufacturer's instructions for water activation exactly.
The single biggest mistake in paver installation is skimping on base depth or compaction. A thin or poorly compacted base will shift, settle, and heave, causing pavers to become uneven within a season or two. Never reduce base depth to save time or money. The second most common error is using the wrong type of sand. Rounded play sand or fine masonry sand will not compact into a stable setting bed. Use coarse concrete sand. Third, do not skip edge restraints. Without them, the perimeter pavers will gradually migrate outward over time, opening the joints and destabilizing the entire field. Finally, do not forget to account for drainage. If water pools on the finished surface or against your foundation, the installation has a slope problem that needs to be corrected before the pavers go down.
