Should I keep saw cuts every 10 feet on my Ottawa concrete driveway?

Yes, you should absolutely maintain those saw cuts (control joints) every 10 feet on your concrete driveway. Those cuts are intentionally placed to control where cracking occurs, and they're especially critical in Ottawa's extreme freeze-thaw climate.

Control joints work by creating a planned weak point where the concrete will crack as it shrinks and expands through Ottawa's brutal temperature swings. Without these cuts, your driveway would develop random cracks throughout the slab — often in highly visible areas or patterns that compromise both appearance and structural integrity. The 10-foot spacing follows standard concrete practice for residential driveways and works well for Ottawa conditions.

In Ottawa's climate, these joints face unique stresses that make proper maintenance essential. Our 50+ freeze-thaw cycles per winter drive water into any crack or joint, where it freezes and expands by 9 percent, widening the opening. Road salt and de-icing chemicals accelerate this process by lowering the freezing point and keeping water liquid longer, allowing deeper penetration before the next freeze cycle. Over time, the joints can widen from their original 6mm to 12mm or more.

Maintain the joints by cleaning and sealing them every 3-5 years. Remove any debris, weeds, or old sealant with a wire brush or pressure washer. Fill the clean joints with a high-quality polyurethane or silicone concrete caulk designed for exterior use. This prevents water infiltration while allowing the natural expansion and contraction movement the joints were designed to accommodate. Avoid rigid fillers like mortar or concrete — they'll crack out within one Ottawa winter.

Signs your control joints need attention include widening beyond 10mm, vegetation growing in the joints, spalling (concrete chipping) along the joint edges, or water pooling in the cuts. If you see random cracks developing between the control joints, it often indicates the joints aren't functioning properly and need immediate resealing.

When to call a professional: If the joints have widened significantly (over 15mm), show extensive spalling, or if random cracking has developed throughout the slab, consult a concrete contractor. Major joint deterioration often indicates underlying issues with the concrete mix, curing, or base preparation that may require more extensive repair.