What Sand To Use For Block Paving?

While your style of paving provides the aesthetics you’re looking for, it’s the foundation and joining of your block paving that makes the real difference. Using sand to lay your block paving ensures strength, durability, and long-lasting results. But it’s important to use the correct type of sand for your block paving project to be a success.

This article guides you through the different types of sand to use when laying block paving, along with the properties of each type of sand, and how to use sand effectively when paving. 

What is Polymeric Sand?

Polymeric sand is a type of joining sand used for block paving and other landscaping projects. It’s a fine sand with polymer additives that, when combined with water, create a robust binding joint. Ideal for creating strong and durable block paving, it's becoming a popular choice for paving projects. 

Other Types of Sand For Block Paving

There are three other types of sand for landscaping. When it comes to block paving, we recommend using sharp sand for a solid base and polymeric sand to ensure strong, durable joints. 

Sharp Sand

Sharp sand consists of larger particles and a coarser texture. This makes it a robust and hard-wearing sand material. Perfect for building sturdy foundations for your block paving and for withstanding heavy loads. 

Kiln-dried Sand 

Also known as jointing sand, this type of sand is used for the top layer and joining of your block paving. It’s been kiln-dried to remove any moisture, producing a fine, dry texture. This makes it ideal for sweeping and compacting into paving joints.

Building Sand

Building sand isn’t typically used for block paving as it’s more suited to bricklaying. However, it can be used as a base layer in certain scenarios. Just bear in mind that building sand needs to be compacted thoroughly to support paving blocks.

Factors to Consider When Choosing Block Paving Sand

Sand Permeability – Look for permeable sand. This will aid with water drainage and prevent water from sitting on top of your block paving.

Joint Stability – Several sand products will include a joint stabilisation element to help bind, strengthen and keep your blocks in place. 

Sand Colour – Choose either a light or dark sand colour that complements the shade of your block paving to deliver a smart, professional finish. 

Different Types of Sand for Block Paving

We offer a wide range of landscaping sand, as well as patio and paving grout products to support your block paving project. For customers seeking sweep-in patio grout, you can view our range here. You can also read our article on the Best Type of Brush-in Grout. For customers looking for high-quality sand for their block paving, view our core products below:

Why Sanding Block Pavement Is Important

Block paving is often used for bearing heavy loads. So structural integrity is a must. One way to achieve this is by using the right type of sand. Applying sand to block paving also ensures:

• Structural Stability – Sand helps distribute weight evenly across the slab to reduce pressure points, prevent movement and ensure slab stability.

• Even Surfaces – A sand base provides a flat foundation for block pavers to settle into place, creating a flat, even and secure surface. 

• Weed Suppression – Weeds will optimise any free space. Installing sand between the smallest joints can help prevent weeds from appearing.

• Water Drainage – Permeable sand helps surface water drain into the earth, reducing water pooling and slippery surfaces.

• Finishing Touch – Sand detailing between your block paving creates a neat and professional look to your patio, courtyard or driveway. 

When To Re-Sand Your Block Paving

Sand infills will weaken over time. It’s important to review the appearance and condition of your paving joints to prevent further issues down the line. Signs that you need to re-sand your block paving, and which sand to use, include:

• Visible gaps between the slabs – Use a polymeric sand to easily refill these gaps.

• Increase in weed growth – Fine sand will filter and fill the gaps, suppressing weeds.

• Wobbly or loose slabs – Safely lift the loose slab and add sharp sand to relevel it.

• Cracks within joints – Repair cracks with a fine, dry sand, compacting it into place.

Tools Needed to Apply Sand to Block Paving

Like any landscaping project, the best start to laying your block paving is by having the right outdoor paving tools to hand.

• Sharp sand for base layer

• Fine, dry sand for top layer

• Shovel

• Paving Hammer

• Trowel

• Spirit Level

• Soft-bristle broom 

• Plate compactor (optional)

For any additional advice or support with laying block paving, get in touch with the Pro Tiler Team.