When beginning a DIY retaining wall project, it’s essential to select the appropriate materials based on the scale of your project. Experts recommend weighing your options between residential and commercial grade blocks.

Residential grade blocks are generally suitable for light landscaping work, such as garden beds. These blocks are typically 4 inches tall and weigh about 24 lbs. On the other hand, commercial grade blocks, which are 8 inches tall and weigh 83 lbs, provide superior support for projects that need to handle significant weight, such as a driveway or patio.

Hire a helping hand as needed when dealing with the heavier blocks, considering that weight is held in place primarily by a lip on each block’s back.

Rather than relying on big box stores like Home Depot or Lowe's, Scott suggests visiting a local Landscape Supply Center. These centers typically offer competitive pricing and higher-quality materials.

• Access to commercial-grade materials not found in regular stores.
• Experienced staff who provide knowledgeable advice.

A solid foundation is vital for the longevity and integrity of your retaining wall. Begin by consulting the manufacturer’s guidelines for specific depth and trench requirements.

• Ensure a minimum of 4 to 6 inches of compacted base material, like CA6 or road pack.
• Avoid using sand alone for foundation as it lacks structural support.

Taking time to level your first row of blocks accurately is crucial. Each block should take several minutes to ensure correctness.

Not incorporating effective drainage can lead to premature wall failure. Drainage prevents hydrostatic pressure that can cause the wall to collapse.

• Use drainage lines placed behind the wall, connected properly with fittings.
• Wrap drainage pipes in fabric to prevent clogging from soil and debris.

Fill the back of your wall with at least 6 inches of clean gravel for effective drainage. Building codes require using 3/4 inch clean rock, not CA6, for drainage efficiency.

“Take your time securing the first row. It determines the accuracy of the entire wall.”