ANSWERS: 1
  • <h4 class="dechead">On One Hand: Calculate Carefully

    Measure the length and width of your area and the concrete patio thickness that your local building code requires. Contact your city's Building Division to determine the requirement. The calculator at decks.com will tell you how many bags of concrete you need, according to your measurements. It works with round and square or rectangular patios and 60- or 80-lb. bags of concrete.

    On the Other: Purchase Extra

    Always buy at least two more bags than you think you need. This will allow extra concrete in case of spillage, damaged bags or uneven grade. You should not stop in the middle of pouring your patio to go buy more concrete.

    Bottom Line

    Take your measurements very carefully and follow the recommendation of the online calculator plus extra for waste. Never try to make do with fewer bags, even if it means you only use a tiny bit of one bag. Have all your concrete on site before beginning to mix and do not open any bags until you need them. This way, you can return leftover bags.

    Source:

    Decks.com: Concrete Calculator

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