Polymeric Sand in Ottawa: When It’s Worth It (and When It’s Not)

What polymeric sand actually does

It hardens in the joints after activation, creating a more stable joint fill than regular sand.

That can help reduce weed growth and limit joint washout in heavy rain.

When it’s worth it

Polymeric sand is usually a good fit when:

• Your joints are clean and dry (critical).
• You want fewer weeds and a crisp joint finish.
• You’ve already fixed any uneven/sunken areas first.

When it’s not worth it (yet)

Hold off if:

• The surface is still shifting/sinking (leveling should come first).
• There’s ongoing drainage/pooling water—fix slope and water flow first.
• It’s too wet/cold to cure properly (weather timing matters).

Common mistakes we see

Most issues come from prep and timing.

• Applying before the surface is fully dry
• Leaving residue haze on the pavers
• Underfilling joints or skipping compaction