How to Install a Flagstone Walkway With Concrete

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Installing a flagstone walkway with concrete is a fairly challenging do-it-yourself project. Building with concrete rather than sand has several advantages though: a concrete base will ensure a more solid and stable foundation and concrete requires little maintenance over the years. Although installing a flagstone walkway with concrete might be a challenging, time-consuming project, the money you can save by doing it yourself can make it worthwhile.

Things You'll Need

  • Flagstones
  • Wood posts and string
  • 2-by-4s
  • Screws
  • Concrete
  • Mortar
  • Trowel
  • Rubber hammer
  • Sanded grout
  • Grout sponge
  • Hand tamper or plate compactor
  • Gravel
  • Measure out the area for your flagstone walkway and use wood posts with string tied along the outside to mark the border.

  • Call your city's building department and find out if you need any special permits or licenses before you begin building.

  • Call your utility provider and ask them to come to your house to check for any underground wiring that would prohibit digging.

  • Excavate the entire digging area that you measured out with a shovel.

  • Compact the surface of the soil down using a hand tamper.

  • Line the inner border of your walkway with two-by-fours cut to the length and width of the area. Attach the two-by-fours to each other using screws.

  • Pour a 2-inch layer of gravel into the hole and use a hand tamper to compact the gravel down tightly.

  • Mix the cement according to the package instructions and pour a 3-inch layer of concrete over the entire gravel base.

  • Use a shovel to spread the concrete around and ensure the concrete is filled in thoroughly.

  • Level the concrete out by dragging a two-by-four across the top surface several times until it's flat and even.

  • Allow the concrete 24 hours to dry.

  • Mix the mortar according to the package instructions and pour a 1-inch layer of mortar on top of the concrete base, enough for one flagstone at a time.

  • Use a trowel to spread the mortar into an even 1-inch layer.

  • Place the flagstones on top of the mortar one at a time, starting in any corner of the walkway.

  • Pound each flagstone tightly into place with a rubber hammer.

  • Allow the mortar 24 hours to dry.

  • Mix the sanded grout according to instructions and use a grout sponge to spread it around and into the spaces between each of the flagstones.

  • Let the grout dry for 12 hours and clean the surface of the flagstones before using.

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  • Photo Credit Photodisc/Photodisc/Getty Images
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