Straight talk from 20+ years in the field. Learn what separates a project that lasts from one that fails.
Most retaining wall failures are completely preventable. After 20+ years in the field we've rebuilt dozens of walls that were done wrong the first time. Here's what actually causes them to fail.
This is the #1 killer. When water saturates the soil behind a wall and has nowhere to go, hydrostatic pressure builds up and pushes the wall forward. Every wall needs a gravel drainage layer (minimum 12") and a drain pipe at the base. Without it, failure is just a matter of time.
Walls over 3–4 feet tall need to be anchored back into the hillside. For block walls, geogrid — a heavy mesh fabric — is layered between courses and buried deep into compacted backfill to tie the wall back. For timber or lumber walls, deadmen are the equivalent: horizontal members driven perpendicular into the slope every few courses. Using the wrong method for your wall type, or skipping it entirely, guarantees eventual failure.
Every retaining wall needs a compacted gravel base — minimum 8 to 12 inches deep, and more for taller walls. On top of that base, at least a partial course (and ideally a full course) of wall block should be buried below grade. This buried course is your real foundation — it resists sliding and gives the wall a solid locked-in starting point. Skip it and the bottom of the wall has nothing anchoring it to the ground.
Aeration is one of the most overlooked and most impactful things you can do for a lawn. Most homeowners skip it — and then wonder why their grass looks thin, stressed, or just won't respond to fertilizer the way it should.
Core aeration pulls small plugs of soil out of the ground, opening up channels directly to the root zone. This allows oxygen, water, and nutrients to penetrate deep into the soil instead of sitting on top of a compacted surface. Grass roots need oxygen to thrive — compacted soil suffocates them slowly over time.
Over time, a layer of dead grass, roots, and organic matter called thatch builds up between the soil and the blades. A thin layer is fine, but when it gets too thick it blocks water and air from reaching the roots. Compaction from foot traffic, mowing, and heavy clay soils compounds the problem. Aeration tackles both at once.
For cool-season grasses — bluegrass, fescue, ryegrass — the best time to aerate is early fall (late August through October). The soil is still warm, the grass is actively growing into winter, and aeration holes fill in quickly. Spring is a secondary option but fall is ideal because it also sets up overseeding perfectly.
Warm-season grasses — bermuda, zoysia, buffalo grass — should be aerated in late spring to early summer when they're in peak active growth. Aerating during dormancy stresses the grass and slows recovery. Timing matters — always aerate when the grass can heal and fill in quickly.
Irrigation troubleshooting, xeriscape design principles, drainage solutions, and more. Check back regularly.