Retaining wall failures are typically categorized into structural damage (cracking or breaking) and overall stability failures. The vast majority of collapses stem from trapped water, poor soil compaction, or inadequate structural design.
The five modes of failure are identified as sliding, overturning, bearing capacity, shallow shear, and deep shear failures. Factors of safety are provided for each failure mode.
Our professional building inspectors often find that retaining wall failures boil down to poor planning, poor installation, and, most commonly, poor drainage.
Most policies provide coverage for retaining wall damage caused by covered perils, which typically include fire, lightning strikes, windstorms, hail damage, vandalism, theft, and damage from vehicles.
The 1/3 rule is a general guideline for stability: About 1/3 of the wall's total height should be buried below ground. This helps the wall resist the pressure from soil and moisture behind it.
Seven common mistakes when installing retaining wall blocks include poor base preparation, inadequate drainage, not using proper backfill, failing to compact soil, improper alignment of blocks, ignoring wall height limits, and neglecting to use geogrid reinforcement when needed.
All walls need and should have drainage plus the proper amount of stone backfill to prevent push from freeze/thaw.
Responsibility for a collapsed retaining wall typically falls on the property owner on whose land the wall is located. However, liability can shift based on local grading laws, the original cause of the collapse (such as poor construction or neighbor negligence), or who fundamentally benefits from the wall.
Avoid making guesses or unsupported statements about what caused the damage to your property. Speculating can lead to inaccuracies in the adjuster's report, potentially affecting your claim.
Most homeowners insurance policies cover foundation repair as long as the damage is due to a covered peril. Issues such as neglect or lack of maintenance can result in foundation issues that won't be covered, so it's important to prevent damage before it starts.
Fixing a failing retaining wall requires identifying the root cause—usually poor drainage or soil pressure. For minor cracks, you can repoint mortar or patch timber sections. For bowing, leaning, or collapsing walls, you must excavate behind the wall, install proper drainage (like a perforated pipe and gravel), and potentially rebuild or anchor it.
The 4 main types of retaining walls are gravity, cantilever, sheet pile, and anchored walls. Each uses a distinct engineering mechanism to hold back soil and combat the natural pressure of the earth.
Signs of a Failing Retaining Wall
Sagging or bowing: Chances are, if it looks like your retaining wall is beginning to bend, there may be a problem with the structure itself or what it's holding back.
A failing retaining wall rarely collapses without warning. Spotting early signs of stress—such as leaning, cracking, or water pooling—can save you from costly property damage and emergency repairs.
Conclusion. Compressive, tensile, bending and buckling are the basic types of structural failure for construction elements. These are caused due to faults in design and construction.
Poured concrete retaining walls are the strongest and most durable option available.
Stable Soil for Easier Repairs. Cold weather slows soil movement, making winter one of the best foundation inspection and repair times. Unlike spring and summer, when moisture and temperature changes cause shifting, winter's stability allows professionals to assess damage and implement long-lasting solutions accurately ...
Foundation leaks are serious and should never be ignored. Water damage can weaken your home's structural integrity, cause costly repairs, and create health hazards from mold growth. Unfortunately, foundation leaks will only worsen over time.
Damage caused by most disasters is covered but there are exceptions. Standard homeowners policies do not cover flooding, earthquakes or poor maintenance. Flood coverage is provided by the federal government's National Flood Insurance Program, although it is purchased from an insurance agent.
The insurance company that denies the most claims depends heavily on the type of insurance you are referring to:
How to Intimidate the Insurance Adjuster
The 80% rule in homeowners insurance dictates that your dwelling coverage must equal at least 80% of your home’s total replacement cost. Meeting this threshold ensures your insurance company covers the full cost of repairs (minus your deductible) for a covered loss.
The issue: Even the best retaining wall design can fail if it's not built correctly - whether through poor compaction, lack of reinforcement, or incorrect alignment. How to avoid it: Work with experienced contractors who follow recommended methods.
It is generally accepted that the person whose land is retained by the wall is responsible for its repair and maintenance.
Never Remove a Retaining Wall
In most cases, you're better off replacing individual sections or reinforcing existing segments. It's unfortunate, but a surprising number of the jobs we perform are repairs of repairs — drastic fixes for walls that originally required only minor intervention.