How to Put in Landscape Timbers

Decide where you want to install the landscape timbers and how you plan to use them. You can build a raised flower bed in an area with a drainage problem or build timber steps on a steep slope. If you're building a retaining wall more than 3 feet high, consult your local building codes to see if there are restrictions.

Measure the site to determine how many timbers you need. Landscape timbers are usually sold in 8-foot lengths that measure 6-by-6 inches, or 4-by-4 inches.

Clear the site of grass, root systems and debris, and dig a trench 5 inches deep. Spread a 1-inch layer of sand over the trench and place a level on the surface to check that it's even.

Use a circular saw to cut the timbers to fit the length of the trench, making cuts on each side of the landscape timber and finishing the cut with a handsaw if necessary.

Set the first layer of landscape timbers in the trench. Place them as tightly as possible from end to end. Use the level on each timber to ensure your foundation is even. If there's an angle, use a hammer to tap one end of the timber deeper or dig out parts of the trench when necessary.

Place your second row of timbers on top of the first row, offsetting the joints by at least 4 inches on either side. This laced pattern enhances the design and adds more stability. If the second-layer timbers are not level, wedge some shims between the first and second layers to even them out.

Drill pilot holes every 4 feet, and at the ends of each timber on the top layer. Use a sledge hammer to drive a 12-inch spike through each hole and into the timbers beneath.

Fill in any gaps between the bottom timbers and the ground with dirt. Pack the dirt with the back of a shovel.