One of the biggest advantages of interlock over concrete or asphalt is that it’s repairable. A cracked concrete slab gets patched – and looks patched forever. An interlock installation can be lifted, corrected, and re-laid with no visible evidence anything was wrong. But knowing when repair is the right call versus full replacement takes some judgment.
Common Interlock Problems in Ottawa
Frost heave and settling: Ottawa’s freeze-thaw cycle pushes stones up or lets them sink. Usually a localized base or drainage problem, not a failure of the whole installation.
Joint sand erosion: Polymeric sand degrades over time from rain, snow melt, and wear. Weeds and ants move in. This is normal maintenance, not a failure – top up every 3-5 years.
Edge spreading: When edge restraints fail, the perimeter spreads. Fixable – replace or re-secure the restraints, close gaps, re-sand.
When to Repair
- A few stones have heaved in one area
- Joint sand needs topping up
- Edge restraints need re-securing in a section
- A small area has settled from a localized drainage issue
- Individual stones are chipped or cracked
When to Replace
- Base was improperly installed throughout and the entire surface is unstable
- Heaving and settling is widespread, not just one spot
- Installation is 25+ years old and the base has deteriorated beyond repair
- You want a completely different layout, pattern, or stone
A professional assessment will tell you which situation you’re in. An experienced contractor can lift a few stones, inspect the base, and give you an honest answer. For more on DIY vs professional work, see our guide on DIY interlock in Ottawa.
Get Your Free Estimate Today
Need your Ottawa interlock repaired or assessed? Contact JAL Deck & Interlock for a free estimate. We serve Ottawa and surrounding areas including Stittsville, Carleton Place, Nepean, Barrhaven, and beyond.