Concrete Curing Guide: Duration, Watering, and Preventing Cracks
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Transcript
I learned something new — I didn’t realise that once the concrete is dry, you actually need to keep watering it to prevent cracking. That’s good to know. Does anyone know how long we need to keep the water flowing? Is it every day? Just once in a while? Or continuously?
Keep it wet for as long as possible — usually for a seven-day period.
So if it rains, that’s good, right? We can stop?
Yes. The whole idea is to slow the curing process down.
I just wanted to ask — in New Zealand, they cut the concrete in several places to help control cracking. Do you do that here?
Not on a raft slab. This one’s a raft slab. If it were a paving slab or an infill slab, you’d do saw cuts to control the cracking.
Alright, so on this slab, we don’t?
No.
Thank you.
Keeping concrete moist during curing is critical to its long-term strength and durability. Whether you’re building a kit home or laying a slab foundation, understanding how to properly cure concrete can help prevent cracks and structural issues.
How Long Should Concrete Stay Wet?
For best results, concrete should remain moist for at least 7 days after pouring. This extended curing period allows the slab to strengthen gradually and reduces the risk of surface cracking. The slower the curing process, the better the final result.
What If the Concrete Looks Dry?
Even if the surface appears dry, curing isn’t complete. It’s essential to continue applying water, especially during the first week. Surface dryness doesn’t mean the slab has reached full strength.
A light hose or misting spray can help maintain surface moisture throughout the day. Focus on keeping the concrete evenly moist, especially during the hottest parts of the day.