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Pervious concrete can last from 20 to 40 years when properly mixed, poured, and maintained. Pervious concrete requires yearly maintenance to remove debris from the surface that can block the voids and interfere with effective drainage, but properly maintained pervious concrete can last as long as traditional concrete.

Poured concrete should be set and hard to the touch within 24 to 48 hours, although it depends on the humidity in the air, the thickness of the concrete, and the type of concrete. It’s best to leave concrete to set for three days before exposing to foot traffic or stress. Concrete takes between 20 and 30 days to cure and reach its peak strength, so for foundations and retaining walls, plan to wait about a month before placing any load on your concrete.

Yes, you should always wet concrete before jackhammering to avoid harmful dust from becoming airborne. According to the U.S. Occupational Safety and Health Administration, they recommend a wet-cut method that involves continuous spraying of the concrete where the jackhammer bit hits. Use a jackhammer with a built-in sprayer attachment, or have a work partner spray the area with a garden hose and spray nozzle.

Concrete dries faster in the heat than in the cold, but when concrete cures too fast, it can cause weak concrete. It’s best to pour concrete when temperatures are between 50 and 85 degrees Fahrenheit, watering it five to 10 times per day for seven days (unless you pour concrete in the winter). Slower cure times, such as when pouring concrete in cold weather, can cause strong concrete, but you need to monitor the temperature drop and moisture levels. Avoid pouring concrete when temperatures are below 40 degrees Fahrenheit.