Why Concrete Sinks: The Ultimate Guide for Lynnwood, WA Homeowners

Answering The Question Why Concrete Sinks: The Ultimate Guide for Lynnwood Washington Homeowners

Signs of Sinking Concrete

Recognizing the warning signs of sinking concrete early can help you prevent more significant damage and costly repairs. Here are some common indicators:

• Uneven Surfaces – Sections of your driveway, sidewalk, or patio appear lower than others.
• Visible Cracks – Large cracks in the concrete may indicate that sections are shifting due to sinking.
• Pooling Water – Water accumulating in certain areas where it didn’t before is a sign that the surface has settled unevenly.
• Gaps Between Concrete and Structures – If your concrete patio or steps are pulling away from your home’s foundation, they may be sinking.
• Tripping Hazards – Uneven concrete can create dangerous obstacles, increasing the risk of falls and injuries.

If you notice any of these issues, it’s important to act quickly before the damage worsens.

Why Does Concrete Sink?

Several factors contribute to sinking concrete, and understanding the cause is essential for finding the right solution. Here are the most common reasons:

1. Soil Erosion

• Lynnwood experiences significant rainfall, which can lead to soil erosion beneath concrete slabs. As water washes away the supporting soil, voids form, causing the concrete to sink over time.

2. Poor Soil Compaction

• If the soil beneath a concrete slab wasn’t properly compacted during installation, it may gradually settle, leading to uneven surfaces. This is especially common in newer homes or properties where the ground was disturbed for construction.

3. Water Drainage Issues

• Improper drainage or clogged gutters can cause water to accumulate beneath concrete, softening the soil and leading to sinking. Ensuring that water is directed away from concrete surfaces is key to preventing this issue.

4. Tree Roots & Organic Material Decay

• If large tree roots are present beneath your concrete, they can either push up the slab or, when they decay, leave empty spaces that cause sinking. Similarly, organic materials like mulch or debris under the slab can decompose over time, leading to instability.

5. Heavy Loads & Traffic

• Driveways and walkways that bear heavy loads, such as parked vehicles or excessive foot traffic, may sink over time if the supporting soil is not strong enough to handle the weight.

How to Support and Level Sinking Concrete

Once concrete starts to sink, it’s crucial to address the issue before it leads to more extensive damage. Here are the most effective methods for stabilizing and leveling your concrete:

1. Mudjacking (Slabjacking)

Mudjacking is a process where a slurry mixture is injected beneath the concrete to lift it back into place. While this method can be effective, it is not always a long-term solution, as the materials used can break down over time.

2. Polyurethane Foam Injection

A modern alternative to mudjacking, this technique involves injecting lightweight polyurethane foam beneath the concrete. The foam expands and hardens, providing a durable and long-lasting lift. This method is less invasive and provides better moisture resistance.

3. Replacing the Concrete

In cases where concrete is severely damaged or sinking beyond repair, complete replacement may be necessary. At Sharks Concrete, we ensure that your new concrete is poured with a properly compacted base to prevent future sinking.

4. Improving Drainage

Preventative measures like installing proper drainage systems, extending downspouts, or regrading the landscape can help prevent soil erosion and further concrete sinking.

5. Strengthening the Soil Base

Using high-quality fill materials, such as gravel or sand, beneath your concrete can help improve its stability. Proper soil compaction during installation is critical to preventing future issues.

Contact Sharks Concrete for an Estimate

Sinking concrete is more than just a cosmetic issue—it can be a safety hazard and a sign of underlying soil problems. Whether you need repairs, resurfacing, or a full concrete replacement, Sharks Concrete is here to help.

As a trusted, family-owned business in Lynnwood, WA, we take pride in delivering expert craftsmanship, high-quality materials, and tailored solutions for all your concrete needs. Our skilled team ensures that your project is completed efficiently, on time, and with long-lasting results.

Don’t let sinking concrete become a bigger problem. Contact Sharks Concrete today for a consultation and estimate! You can also follow us on Facebook, Instagram, and TikTok to check out our recently completed projects!