Things to Know Before Installing Paver Edge Restraints

Planning a patio, driveway, or walkway project often starts with choosing colors, textures, sizes, and patterns that will complement your space. While the design elements will naturally draw the eye, it’s what lies beneath the surface that plays just as big a role in your project’s long-term success.

Beneath those pavers are a few unsung heroes of durability, with edge restraints being one of the most important. These hidden components help keep everything in place to preserve the structural integrity of your paver installation.

If you’re getting ready to break ground, here are a few key things to know before installing edge restraints on your project.

What are the Most Common Types of Edge Restraint?

There are two main types of paver edge restraints: plastic and modified concrete.

Plastic edge restraints are long, flexible strips that line the outer edge of your pavers and are secured into the base with non-galvanized metal spikes. This type of edging works best with traditional gravel bases that include both stone and fines, allowing the spikes to grip more effectively.

In contrast, modified concrete edge restraints are made from a blend of cement, water, microfibers, and high-performance polymers. This material is designed to deliver flexibility and strength across different base types, including open-graded systems. While concrete restraints can deliver a seamless look, they also require careful handling and installation due to the preparation involved to create the mix.

Are Paver Edge Restraints Necessary?

Absolutely. Edge restraints are crucial to maintaining the stability of your paver installation. Without them, pavers can shift over time, creating gaps or uneven surfaces that lead to tripping hazards. The only time an edge restraint isn’t required is when your project meets a fixed structure, such as your home’s foundation, a retaining wall, steps, or planter.

How Do I Install Paver Edging?

To install edge restraints properly, start by scraping back the bedding layer along the perimeter of your project to expose the compacted base underneath.

For plastic edging, place your restraint so it sits about ½” below the top of the pavers. Next, use a hammer to gently tap the metal spikes into the holes along the edging, stopping about ¼” above the collar. This allows the spikes to naturally rust, locking them in place for a stronger hold.

Concrete edge restraints require a bit more preparation. Begin by mixing water with your dry concrete blend, paying close attention to the manufacturer’s instructions, as water-to-mix ratios may vary depending on the brand. Once mixed, apply the material along the edge of the paver field using a flat concrete trowel, tucking it slightly under the edge of the pavers before shaping it into a wedge at a 30-degree angle. Ideally, the top of the wedge should stop about ½” below the paver surface for a clean finish.

Where Can I Buy Paver Edge Restraints?

While Unilock does not manufacture edge restraints, you can find a wide range of products at various landscape supply yards, big-box hardware stores, and through professional contractors. Brands like Alliance Gator and SEK Surebond offer a variety of well-regarded solutions tailored to your project.

Since edge restraints are vital to the long-term durability of your outdoor space, we strongly recommend working with a certified paver contractor. These professionals can help you choose the right product based on your specific site conditions and install it correctly to save you time, effort, and potential issues down the road.

If you’re planning a DIY project, feel free to reach out to a local Unilock Territory Manager or give us a call directly at 1-800-UNILOCK for personalized guidance.

Does Paver Edging Ever Go On Top of the Bedding Layer?

The short answer is no, edge restraints should never be installed on top of the bedding layer. That’s because the bedding is designed to settle slightly over time, which means any movement will cause the restraints and eventually the pavers to shift, compromising the structural integrity of your project.

Do You Install Edge Restraints Before Or After Pavers Are Laid?

Edge restraints can be installed either before or after the pavers are laid. One advantage to installing them beforehand is that they create a clear border to help screed your bedding layer. What matters most is that the restraints must be installed prior to the final compaction of your pavers. This allows the pavers to properly settle into the bedding layer for a stable finish.

How Long Does Paver Edging Typically Last?

The lifespan of your edge restraints will depend on several factors, including material type, local climate, and most importantly, the quality of the installation. While both plastic and concrete edging are designed to be durable, harsh freeze/thaw cycles and shifting ground can gradually impact their performance over time. A good rule of thumb is to inspect your edge restraints once a year, ideally in early spring once the snow melts, to check for any movement or damage. Regular upkeep can go a long way in preserving the look and stability of your design.

Paver edge restraints may not be the most visible part of your outdoor project, but they’re one of the most important for keeping things secure for years to come. If you’re planning to tackle a new hardscape project this year, consider visiting our Find a Contractor page to connect with a certified Unilock Authorized Contractor near you. These experienced hardscapers have the technical knowledge and expertise to install your entire paver project efficiently, giving you long-term peace of mind.