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How to Make Concrete Block Molds

Updated February 21, 2017

When working on your own garden construction projects, whether you are building a retaining wall or refinishing a patio, one of the materials that you will most commonly use is concrete blocks. You could spend your money on concrete blocks from a big box home improvement store, or you could make them yourself. Casting your own blocks is easy. All you need is concrete and a mould to cast them with.

Measure the board and make a mark every 2 feet.

Cut the board into four 2-foot pieces at the markings.

Using double-headed nails, attach the pieces into a box shape. This will be the block form. Double-headed are designed to be easier to remove than regular nails, which will make dismantling the form that much easier once the concrete sets.

Place the block form on a flat surface.

Line the block form with a plastic dry-cleaning bag. Your block form is now ready for you to pour concrete into it.

Things You'll Need

  • 8 double-headed nails
  • Hammer
  • Measuring tape
  • 1 2-by-4 board, 8 feet long
  • Saw
  • Plastic dry-cleaning bag
  • Pencil
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About the Author

Tracy Morris has been a freelance writer since 2000. She has published novels and numerous online articles. Her work has appeared in national magazines and newspapers including "Ferrets," "CatFancy," "Lexington Herald Leader" and "The Tulsa World." She holds a Bachelor of Arts in journalism from the University of Arkansas.