FAQs

How much area does 1 cubic yard of concrete cover so I can better estimate the cost of my concrete project?

We get this question a lot as customers begin the planning phase of their project. And as material pricing fluctuates, this is a critical question to be asking so your project estimates are accurate and can be adjusted quickly if the project scope changes. Once you know the thickness requirements for your project/application, the calculations are very simple. Below are the most standard thickness calculations along with the actual formula for your inner DIYer.

Here are the rough estimates based on standard slab thickness:

  1. 4 inches thick: Covers 81 sq ft (Standard for sidewalks and patios)
  2. 5 inches thick: Covers 65 sq ft (Residential driveways)
  3. 6 inches thick: Covers 54 sq ft (A durable thickness to accomodate heavy vehicle driveways or RV pads)
  4. 8 inches thick: Covers 41 sq ft (Commercial parking pads, heavy equipment storage)
  5. 12 inches thick: Covers 27 sq ft (Heavy structural footings, foundations)

When calculating yardage, use the following simple formula:

  1. Multiply the Length, Width, and Depth (in feet) to calculate total cubic feet.
  2. Divide that number by 27.
  3. Add 5% to 10% to account for spills and potentially unlevel ground.

Which PSI grade of concrete should I use for my concrete project?

Below is some "standard" guidance to help you understand the difference in the PSI grades and what is typically recommended based on the application. PSI grade measures the concrete’s compressive strength. It defines how much weight or pressure a square inch of cured concrete can withstand before it fails, cracks, or crushes. The PSI or strength of the concrete mix is primarily determined by its water-to-cement ratio. Less water relative to cement generally yields a higher, stronger PSI. The standard benchmark for measuring PSI is at 28 days after the pour.

Common PSI Grades and Their Applications:

  1. 2,500 to 3,000 PSI: This is the basic starter grade. It works great for light jobs like backyard patios, garden paths, and simple sidewalks.
  2. 3,000 to 3,500 PSI: This grade works best for standard residential driveways and garage floors. It easily supports normal passenger cars and light trucks
  3. 4,000 PSI: This is a heavy-duty mix. Use this for heavy truck traffic, commercial parking lots, or building foundations.
  4. 5,000+ PSI: This is a super strong mix. It is used for large warehouses, bridges, and tall buildings.

Additionally, more concrete stregth is not always better: Exceeding the necessary PSI for your application can sometimes result in a mix that is more expensive, more difficult to finish, and more prone to cracking if not cured properly. What PSI doesn't measure is how well concrete handles being squeezed or compressed. It does not measure tensile strength which is the concrete's ability to resist being pulled apart by settling or thermal expansion. The tensile strength in concrete application comes from steel reinforcement (rebar), not the concrete mix itself.What determines PSI: The strength of a mix is .

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