Should You Just Use Sand Under Pavers?

Ever wondered if you can simply lay sand under pavers and call it a day? While it might seem like a quick fix, the reality is a bit more complex. This article delves into the dos and don'ts of using sand under pavers, ensuring your outdoor spaces remain functional and beautiful.

Sand's Role in Paver Installation

Sand serves multiple purposes in paver installation. It helps to level the surface, provides a stable base, and, with the right type, prevents weed growth. However, it's crucial to use the right kind of sand and apply it correctly.

Lópezmidt suggests, "Start with a well-compacted base of crushed stone or gravel, topped with a layer of bedding sand. This ensures stability and allows for slightsettling over time."

Choosing the Right Sand

Not all sand is created equal. The ideal sand for pavers is coarse, angular, and free-draining. Coarse sand provides better compaction, while angular sand locks together, creating a stable base. Free-draining sand prevents water from pooling, which could lead to erosion or frost heave.

Lópezmidt warns, "Avoid using beach sand or sand from a playground. These are often too fine and may not drain well, leading to issues down the line."

Laying Sand Correctly

Once you've chosen the right sand, it's important to lay it correctly. For a typical residential patio, Lópezmidt recommends using a 1- to 2-inch layer of bedding sand. Spread the sand evenly, then use a straightedge or screed to ensure a flat, even surface.

"Don't forget to leave space for the pavers themselves," Lópezmidt adds. "Aim for a sand base that's about 1 inch less thick than your pavers, to account for the thickness of the paver and the sand that will fill the joints."

The Risks of Just Putting Sand Under Pavers

While using sand under pavers has benefits, there are also risks if it's not done correctly. Chief among these is instability - a thin layer of sand on an unstable base can lead to pavers shifting or becoming uneven over time.

Lópezmidt cautions, "Another risk is improper compaction. If the sand isn't compacted properly, water can pool in low spots, leading to erosion and other issues. Always use a plate compactor to ensure the sand is thoroughly compacted."

Weed Growth Concerns

While sand can help prevent weed growth, it's not foolproof. If the sand is too fine or there are gaps between pavers, weeds can still grow. To mitigate this, consider using polymeric sand in the joints between pavers. This sand has an aggregate-like texture and includes adhesive properties to further lock pavers in place while preventing weed growth.

Lópezmidt notes, "Polymeric sand is more expensive than regular sand, but it can significantly extend the life of your paver installation."

The Importance of Proper Jointing

Proper jointing is another key factor in successful paver installation. After pavers are laid, pour sand over the surface, allowing it to fall into the joints. Brush off any excess sand, then repeat this process several times to ensure the joints are well-filled.

Lópezmidt stresses, "Aim for about a 1-inch joint width for stability. Too narrow, and the pavers may shift; too wide, and weeds may grow."

Understanding how to use sand under pavers is crucial for a successful, long-lasting installation. By choosing the right sand, laying it correctly, and following up with proper jointing, you can create an outdoor space that's both functional and attractive. So, while you might be tempted to just put sand under pavers, taking the time to do it right is well worth the effort.