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Concrete pools have the longest life span. As long as you properly maintain your concrete pool, you can expect it to last 50 to 100 years. That said, you will need to resurface your concrete pool as it ages. Fiberglass is durable, but fiberglass pools generally only last around 25 to 30 years. That said, some high-end fiberglass pools can last more than 50 years if they’re well-maintained.

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.

Yes, adding water to concrete will increase its slump, so you should do so with caution. Always measure the slump of the concrete batch before you adjust it, and be sure not to add too much and push the slump too high. Doing so can cause the aggregate to separate, set inconsistently, or shrink.

With proper maintenance, exterior concrete steps can last 25 to 50 years or more. In most cases, your steps will require some minor repairs over that time frame, including sealing surface cracks and resurfacing to keep them in good condition. Interior concrete steps should last even longer, normally between 50 and 75 years, as they don’t have to stand up to the elements.