How to Bury an Underground Fence Under a Driveway

Underground fencing is a popular choice for containing dogs. It is generally effective and easy to install, however some parts of the lawn can present special challenges. Before you begin the installation process, sketch out the boundaries you plan to use for the fence. Any areas that cross a footpath or driveway require careful installation. The process is fairly straightforward.

Things You'll Need

  • Shovel, ditch machine or circular saw
  • Chalk line
  • Stiff wire
  • Concrete sealant or silicone caulk
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Instructions

    • 1

      Mark the proposed crossing position with a chalk line. If your driveway has a seam, cut along the seam to create a neat, barely noticeable look. If the driveway doesn't have any seams, determine the best area based on how the driveway lines up with the rest of the perimeter fencing. Have a helper hold the end of the chalk line while you walk to the other side of the driveway with the chalk box. Use the crank handle on the chalk box to remove the slack from the chalk line. Lower the line to the driveway and snap it to create a straight chalk line that will serve as a cutting guide. If your driveway is gravel, scrape the excess gravel back before laying the chalk line.

    • 2

      Scrape back any loose gravel until you reach the compacted surface in order to cut through the driveway. Use a ditching machine or a shovel to dig a narrow, shallow trench. Dig the trench wide enough to lay the fence wire in, and 2 to 3 inches deep. To cut an asphalt or concrete driveway, use a masonry blade attached to a circular saw. Stop every few feet to prevent the blade from overheating. The trench should be the same depth as the one around the rest of the yard, typically 2 to 3 inches underground.

    • 3

      Clean out the trench with a piece of stiff wire before laying the line. Once the trench is free of debris, lay the line in the bottom of the trench and press it gently in place.

    • 4

      Apply a layer of concrete sealant or silicone caulk over the line with a caulking gun. Take your time and apply enough sealant or caulk to fill the trench to the top. Let the sealant or caulk cure completely before driving over the area.