Retaining walls work hard every day. They hold back tonnes of soil, manage changes in ground levels, and help create usable outdoor spaces. However, like any structure, they can deteriorate over time, eventually becoming a failing retaining wall if problems are left unaddressed.

If caught early, many retaining wall problems can be repaired before they become major issues. Left too long, a failing retaining wall can collapse, damaging fences, driveways, gardens, and even nearby buildings.

Here are seven warning signs that your retaining wall may be approaching failure.

1. The Wall Is Leaning Forward

One of the most obvious signs of trouble is a retaining wall that is no longer standing straight.

Retaining walls are designed to resist the pressure of the soil behind them. If the wall begins to lean forward, it often means that the pressure behind the wall is exceeding its strength.

Common causes include:

• Poor drainage

• Undersized posts or foundations

• Increased loading behind the wall

• Natural ageing of materials

A slight lean may not seem significant, but it can worsen quickly if the underlying cause is not addressed.

Photo Opportunity: Include images showing walls that have begun to bow or lean forward.

2. Rotting Timber Posts or Boards

Timber retaining walls are popular throughout Hawke's Bay because they are cost-effective and attractive. However, timber does not last forever.

Signs of timber deterioration include:

• Soft or spongy timber

• Crumbling wood around the base of posts

• Visible fungal growth

• Timber that can be easily damaged with a screwdriver

The greatest concern is often below ground level where rot can remain hidden until the wall starts moving.

If timber posts lose their strength, the entire wall can become unstable.

Photo Opportunity: Show close-up photos of rotten posts and deteriorated timber.

3. Cracked Concrete

Concrete retaining walls are extremely strong, but significant cracking can indicate movement or structural issues.

Not all cracks are serious. Small hairline cracks are often cosmetic. However, larger cracks may suggest:

• Foundation movement

• Excessive soil pressure

• Poor drainage

• Structural failure

Pay particular attention to cracks that are widening over time or are accompanied by movement of the wall.

If you notice large cracks, it is worth having the wall inspected before the problem becomes more expensive to repair.

Photo Opportunity: Before-and-after photos of cracked walls and repair work.

4. Water Is Coming Through the Wall

Water is one of the biggest enemies of retaining walls.

When water cannot drain properly, pressure builds behind the wall. This additional force can dramatically increase the load the wall must carry.

Warning signs include:

• Water flowing through the wall

• Constant wet areas

• Mud washing out from behind the wall

• Blocked drainage outlets

A retaining wall may appear strong enough to hold back soil but struggle when it must also hold back water.

Proper drainage is often just as important as the wall itself.

Photo Opportunity: Images showing drainage repairs, drainage pipe installation, or water-related failures.

5. Tree Roots Are Pushing Against the Wall

Trees can create significant problems for retaining walls.

As roots grow, they can:

• Push walls outward

• Lift foundations

• Block drainage systems

• Create uneven pressure behind the wall

Large trees located close to retaining walls should be monitored carefully.

Even if the wall appears stable today, continued root growth can cause gradual movement over time.

6. The Ground Behind the Wall Is Sinking

A retaining wall can sometimes remain standing while the ground behind it begins to settle.

Signs include:

• Depressions forming behind the wall

• Gaps appearing between the wall and soil

• Sunken garden beds

• Uneven paving or paths nearby

This can indicate soil loss through drainage failures or movement of the retained material.

These problems often become more noticeable after heavy rainfall.

Photo Opportunity: Include photos showing settlement behind retaining walls.

7. New Weight Has Been Added Behind the Wall

A retaining wall may have performed perfectly for years and then suddenly start showing signs of distress.

Often the reason is additional weight, known as a surcharge load.

Examples include:

• Vehicle parking areas

• Concrete driveways

• Garden sheds

• Swimming pools

• Raised garden beds

• Large stockpiles of soil

Retaining walls are designed for specific loads. Adding extra weight behind the wall can significantly increase the pressure it must resist.

Before placing heavy structures near an existing retaining wall, it is wise to ensure the wall is capable of handling the additional load.

What Should You Do If You Have a Failing Retaining Wall?

Not every retaining wall showing signs of ageing requires complete replacement.

In some cases, repairs, improved drainage, or partial rebuilding may be enough to extend the wall's life.

The key is identifying problems early.

If you have concerns about a retaining wall on your property, the team at Everyday Contractors can assess the situation and discuss practical options for repair or replacement.

We build and repair timber retaining walls, concrete block retaining walls, and palisade retaining walls throughout Napier, Hastings, and Havelock North.

Need Advice About Your Failing Retaining Wall?

If your retaining wall is leaning, cracking, rotting, or showing signs of movement, contact Everyday Contractors today.

We are happy to inspect the wall, discuss possible causes, and provide practical solutions to help protect your property.

Service Areas: Napier, Hastings, Havelock North and surrounding Hawke's Bay areas.

The easiest way to get started is to send us a few photos or your plans.

📧 Email: info@everydaycontractors.com

Or visit our website: www.everydaycontractors.co.nz

We'll review your project and provide practical advice on the best way forward.

Why Homeowners Choose Everyday Contractors

• Complete project management

• Experienced concrete construction team

• Tight-access machinery solutions

• Quality workmanship

• Clear communication

• Reliable scheduling

• Servicing Napier, Hastings, and Havelock North

If you're considering replacing an old concrete footpath or planning a larger outdoor project, contact Everyday Contractors today to discuss your ideas.

Let's get it done!