What Do You Use to Fill Between Crazy Paving?

When it comes to filling the gaps between crazy paving, there are several options to consider. Paving materials such as asphalt, concrete, stones like flagstone, cobblestone, and setts, artificial stone, bricks, tiles, and even wood can be used to create stunning and durable pavements. These pavements, commonly found on sidewalks, road surfaces, patios, and courtyards, are an essential part of the hardscape in landscape architecture. However, one crucial aspect of creating a seamless and sturdy pavement is filling in the gaps between the paving slabs. This is where wet brush-in joint filler or polymeric sand comes into play. Both options offer a convenient solution for filling large gaps, but it's important to understand their differences. Wet brush-in joint filler provides greater flexibility, preventing cracks in the joints as temperatures fluctuate throughout the year. On the other hand, polymeric sand offers stability, locking the paving stones in place and preventing weed growth. Ultimately, the choice between these options will depend on the specific requirements and preferences of the project at hand.

How Do You Fill Gaps in Crazy Paving?

When it comes to filling gaps in crazy paving, there are a few options that can be effective. One popular choice is using a wet brush-in joint filler or polymeric sand. These materials are typically mixed with water to create a mortar-like consistency that can be brushed into the gaps between the paving slabs.

Using a wet brush-in joint filler has a few advantages. Firstly, it’s more flexible than traditional mortar, making it less susceptible to cracking as the temperature changes throughout the year. This can help to ensure that the joints remain stable and secure.

Polymeric sand, on the other hand, is a sand-like material that contains binders that help to hold it together. When it’s applied between the paving slabs and then activated with water, the binders harden, creating a solid and durable joint. This can help to prevent weeds from growing between the slabs and also provides a more stable surface.

Both wet brush-in joint filler and polymeric sand can be easily applied by brushing or sweeping them into the gaps between the crazy paving slabs. Once the joints are filled, excess material can be brushed away and the surface can be lightly washed to remove any residue.

These materials can be easily applied and help to create stable and secure joints between the paving slabs, reducing the risk of cracking and weed growth.

It’s crucial to ensure that the mortar mix used is able to withstand the absorption and expansion of the paving stones without cracking or breaking. Therefore, choosing a sharp or coarse sand cement mortar mix with the right consistency is essential for a successful and durable crazy paving installation.

What Is the Best Mortar for Crazy Paving?

This can lead to the mortar drying out too quickly and not fully bonding with the paving stones. This will provide a better bond between the stones and the mortar.

In terms of durability, it’s important to choose a mortar mix that’s strong and weather-resistant. Look for a mortar mix that’s designed for exterior use and can withstand freeze-thaw cycles. This will ensure that the mortar doesn’t deteriorate over time and will hold up well under different weather conditions.

Another factor to consider when choosing a mortar mix for crazy paving is it’s ability to flex and move with the paving stones. Crazy paving often consists of irregularly shaped stones, which can shift and move over time. A mortar mix that’s too rigid may crack or become dislodged as the stones move. Opt for a mortar mix that’s some flexibility to accommodate the movement of the stones.

It’s also important to consider the color of the mortar. Some homeowners prefer a mortar color that matches or complements the color of the paving stones, while others prefer a contrasting color for a more distinctive look. There are mortar mixes available in a variety of colors, so choose one that best suits your desired aesthetic.

Lastly, it’s essential to properly prepare the area before applying the mortar mix. Ensure that the surface is clean and free of debris, and consider using a bonding agent or primer to improve the bond between the stones and the mortar. Following these guidelines and selecting the right mortar mix will result in a durable and visually pleasing, finished crazy paving project.

One effective way to fill gaps between old patio slabs is by using a dry grouting technique. This method involves ensuring that the area is entirely dry before mixing dry sand and cement at a ratio of 3:The mixture can then be applied to the gaps and compacted into the joints using a brush. This technique helps to create a solid and durable fill for the gaps in your patio slabs.

How Do You Fill Gaps Between Old Patio Slabs?

This method is popular for filling gaps between old patio slabs because it provides a durable and long-lasting solution. The dry grouting mixture hardens over time, creating a solid barrier that prevents weeds and moss from growing between the slabs. It also helps to stabilize the paving and prevent shifting or movement.

Another option for filling gaps between paving slabs is using jointing compound. Jointing compound is a flexible and weather-resistant material that’s designed to fill gaps and provide a strong bond between the slabs. It can be applied using a pointing trowel or a brush, and it dries to a firm finish. Jointing compound is available in a range of colors, allowing you to match it to your existing paving.

Alternatively, you can use self-setting jointing compound. This type of jointing compound is designed to be mixed with water and poured into the gaps between the slabs. It then sets and hardens, creating a strong and durable bond. Self-setting jointing compound is easy to apply and provides a long-lasting solution for filling gaps between old patio slabs.

If you prefer a more natural look, you can fill the gaps between your patio slabs with gravel or decorative stones. This option is best suited for slabs that have wider gaps or irregular shapes. Simply pour the gravel or stones into the gaps, making sure they’re compacted and levelled. This not only fills the gaps but also adds a decorative touch to your patio.

Using Sand as a Filler for Gaps Between Old Patio Slabs

When it comes to filling the gaps between old patio slabs, sand is commonly used due to it’s affordability and ease of application. It’s a versatile material that can easily conform to irregular spaces and help stabilize the slabs.

To fill the gaps, simply pour the sand onto the patio surface and use a broom or brush to sweep it into the spaces between the slabs. Make sure to pack the sand tightly into the gaps, ensuring a secure and stable fit.

Using sand as a filler not only improves the appearance of your patio by providing a seamless finish but also helps to prevent weed growth and inhibit the movement of the slabs. Additionally, it allows for natural drainage, which is beneficial for preserving the longevity of your patio.

Regular maintenance is recommended to ensure the sand remains in place. Over time, some settling may occur, requiring occasional top-ups to keep the gaps filled and the patio looking it’s best.

Not only does polymeric sand provide a strong and durable solution for filling the gaps between patio pavers, but it’s high content of quartz and silica ensures long-lasting stability. While it may come at a slightly higher cost, the benefits it offers outweigh the investment, making it a reliable choice for any paver project.

What Is the Best Filler in Between Patio Pavers?

It also has an added advantage of inhibiting weed growth and repelling ants. The sand hardens when activated by water, creating an interlocking bond between the pavers. This ensures stability and durability, preventing shifting or sinking. Additionally, polymeric sand is available in different colors, allowing you to match it with your pavers color.

Another option for filling between patio pavers is crushed stone or gravel. This material is commonly used for driveways, pathways, and as a base for pavers. It provides excellent drainage, ensuring that water doesn’t accumulate between the pavers. Crushed stone also offers good stability and prevents the growth of weeds.

If you prefer a more natural look, you can opt for organic materials such as wood chips or shredded bark. These materials are eco-friendly and blend well with outdoor environments. They provide good drainage and discourage weed growth. However, keep in mind that organic materials may decompose over time and require periodic replenishment.

Mortar is a mixture of cement, sand, and water that creates a strong and durable bond. It’s typically used for laying bricks or stones in a fixed pattern. While mortar provides excellent stability, it can be more challenging to maintain than other options. It may crack or erode over time, requiring occasional repairs.

Lastly, if cost is a concern, you can use traditional sand as a filler for your pavers. While sand is the most affordable option, it does have it’s drawbacks. It can be easily washed away by heavy rainfall, requiring frequent reapplication. Sand also provides less stability compared to other materials, making it more prone to shifting and sinking.

Ultimately, the choice of filler for your patio pavers depends on your priorities, budget, and the desired aesthetic. Consider the level of durability, weed prevention, drainage, and maintenance required for each option. Consulting with a professional or seeking advice from a local landscaping supplier can help you make an informed decision.

Tips for Preventing Weed Growth Between Patio Pavers

  • Regularly sweep or blow debris off your patio to prevent seeds from settling between the pavers.
  • Apply a weed barrier or landscape fabric beneath the pavers before installation to inhibit weed growth.
  • Fill the gaps between pavers with polymeric sand or jointing compound to discourage weeds from sprouting.
  • Use a natural weed killer, such as vinegar or boiling water, to target any weeds that do emerge between the pavers.
  • Avoid using excessive water or fertilizer on the patio, as this can encourage weed growth.
  • Regularly inspect your patio for any gaps or cracks in the pavers and promptly fill them to prevent weeds from rooting.
  • Consider using a pre-emergent herbicide to create a protective barrier against weed germination.
  • Trim any nearby vegetation or overhanging plants to minimize the spread of weed seeds onto your patio.
  • Install a geotextile fabric beneath the base layer of your patio to further prevent weed growth.
  • Implement regular maintenance practices, including removing any small weeds that do appear and keeping the patio clean and well-maintained.


Another option is polymeric sand, which can be effective in filling large gaps and creating a stable and long-lasting surface. Whether you choose wet brush-in filler or polymeric sand, both options can help enhance the overall look and durability of your crazy paving.

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