When should I call a ready-mix supplier versus making concrete myself with bags of cement?

One yard of concrete weighs approximately 3,800 lbs. First, figure how much concrete you will need. Even if you just need a half yard of concrete, that’s a lot of material to mix and place by hand. Also take into consideration the amount of time it will take to mix and place that concrete, which could lead to cold joints and finishing issues if the next batch takes a long time to mix and place. Concrete delivered by a ready-mix supplier will typically be more consistent and allow for quicker placement, and is usually more cost-effective. Bag mixes are great for small jobs, but the size of the project dictates when they should be used.