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Concrete is normally used as a structural component in building projects and is a mix of materials, while cement is just one ingredient in concrete, acting as a binder.

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Most concrete bags are 4 inches thick, so if you lay the bags end-to-end, you can measure out the number of concrete mix bags you will need for a designated square footage.

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Concrete mix does not expand when water is added, so a good rule of thumb is that the area the bag of concrete mix takes up will be the same size it will be when water is added and it hardens.

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This rule of thumb is best used when laying a 4-inch thick concrete pad.

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Armstrong Lumber Co. is a locally owned and operated building supply store in south Texas, established in 1946. We are an old-fashioned full service lumber yard providing quality construction materials to the professional builder, business industry, and individual.

  • We ensure to provide a balanced and diverse inventory with a goal of filling customer’s needs timely and completely.

  • Our sales team members are knowledgeable in every department, with over 100 years combined experience in the business.

  • We strive to provide an experience that surpasses all of your expectations.

We invite you to visit our location or contact a sales team member for your building needs!

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