How To Break Up and Remove Concrete

Breaking up and removing concrete is a challenging but sometimes necessary task for many home improvement projects. Whether you’re replacing an old driveway, removing a patio, or preparing for new landscaping, understanding the proper techniques and tools can make all the difference. We’ll walk you through the process of breaking up and removing concrete safely and efficiently while providing some expert tips.

Concrete Composition and Properties

Concrete is a durable material composed of cement, aggregate (such as sand and gravel), and water. Its strength and longevity make it a popular choice for the outdoors, but these same qualities also make it challenging to remove. The thickness, age, and reinforcement of concrete all play a role in determining the best approach for removal.

Safety Precautions and Preparation for Removing Concrete

Before beginning any concrete removal project, prioritize safety and proper preparation. This includes gathering the necessary protective gear and contacting utility companies to avoid damaging underground lines.

Protective Gear Requirements

When breaking up concrete, always wear the following protective equipment:

• Dust mask or respirator
• Ear protection
• Heavy-duty work gloves
• Long pants and sleeves
• Safety glasses or goggles
• Steel-toed boots

Contacting Utility Companies

Before you start digging or breaking concrete, you need to call 811 or your local “Dig Safe” authority. This free service will mark the location of underground utilities, helping you avoid potentially dangerous and costly accidents.

Essential Tools for Breaking Up Concrete

The right tools can make your concrete removal project easier and more efficient. Here’s an overview of the most effective options.

Jackhammers and Electric Breakers

A jackhammer is often the most efficient tool for thick concrete (3 inches or more). Electric jackhammers are available for rent and suitable for most residential projects. They’re particularly effective for breaking up sidewalks, patios, and other large concrete areas.

When using a jackhammer:

1. Position the chisel at a slight angle to the concrete surface.
2. Let the tool’s weight do the work—don’t apply excessive pressure.
3. Work in a grid pattern, breaking the concrete into manageable sections.
4. Take frequent breaks to avoid fatigue and maintain control of the tool.

Rotary Hammers and Chisels

Rotary hammers are versatile tools that excel at breaking up smaller amounts of concrete. They’re essentially handheld jackhammers and are great for more precise work. With various attachments like chipping bits and spade bits, they can handle various concrete removal tasks, including removing tile and thin-set mortar.

Sledgehammers

For thinner concrete or situations where power tools aren’t practical, manual tools like sledgehammers can be effective. Although manual tools require more physical effort, they can be useful for creating fault lines in concrete or breaking up brittle surfaces.

When using a sledgehammer:

1. Start at the edges or existing cracks.
2. Use controlled, powerful swings aimed at the same spot to create a break.
3. Work your way across the slab, breaking it into manageable pieces.

Digging Bars and Pry Bars

Digging bars and pry bars can be useful for breaking up concrete found in the ground, such as when installing fences or mailboxes. These tools create fault lines in the concrete and help pry apart sections once they’re broken.

Assessing Your Concrete Removal Project

Before starting, it’s also important to evaluate the scope of your project. This includes measuring the concrete thickness and estimating its weight to determine the best removal method and disposal strategy.

Measuring Concrete Thickness

The thickness of the concrete will largely determine which tools and techniques will be most effective. We suggest using a drill with a masonry bit to create a small hole and measure the depth. This will help you choose the appropriate tools and estimate the effort required.

Estimating Concrete Weight

Concrete is heavy—about 145 pounds per cubic foot. Estimating the weight is necessary for planning removal and proper disposal. For example, a 6×10 utility trailer can safely carry about one ton of concrete. Consider this when planning your removal strategy and disposal method.

Chemical Methods for Concrete Breakdown

In some situations, chemical methods can be used to assist in breaking up concrete. While not as common as mechanical methods, they can be effective in certain circumstances.

Expanding Grout Application

Expanding grout is a chemical agent that can help break up concrete without the need for heavy machinery. To use expanding grout:

1. Drill holes in the concrete at regular intervals.
2. Mix the expanding grout according to the manufacturer’s instructions.
3. Pour the mixture into the holes and wait for it to expand and crack the concrete.

Safety Considerations for Chemical Use

When using chemical methods, you should always wear appropriate protective gear, such as gloves and eye protection. You’ll also want to have proper ventilation in the area you’re working in, particularly if you’re working indoors. You must dispose of any leftover chemicals properly and safely.

Cutting and Removing Concrete Posts

Removing concrete posts, such as those used for fences, can present unique challenges. Often, it’s more practical to cut the post rather than attempt to remove the entire concrete base. When planning new post locations, consider shifting the layout to avoid old footings where possible. This approach can save time and effort in the long run.

A reciprocating saw with a metal-cutting blade is often the best tool for cutting concrete-set posts. For posts with larger diameters, you may need to use a circular saw with a metal-cutting blade or an angle grinder.

To remove a concrete-set post:

1. Excavate around the base of the post to expose a few inches of the concrete footing.
2. Cut the post below grade level using your chosen cutting tool.
3. If necessary, break up the remaining concrete footing using a sledgehammer or jackhammer.

Concrete Debris Disposal Options

Properly disposing of concrete debris is an important part of any removal project. Depending on the amount of concrete and local regulations, several options are available, such as recycling or removal services.

Recycling Broken Concrete

Many areas have facilities that recycle concrete by crushing it to use in new concrete or as a base material for roads. This is often a more environmentally friendly option than sending concrete to a landfill. Contact local recycling centers or concrete suppliers to inquire about recycling options.

Hiring Dumpsters and Removal Services

For larger projects, renting a dumpster can be a convenient option. However, some waste management companies have restrictions on concrete disposal or may charge extra fees. Always check with the provider about their policies regarding concrete disposal.

Alternatively, consider hiring a specialized concrete removal service. These companies have the equipment and expertise to efficiently handle large-scale concrete removal and disposal.

Tips for Minimizing Concrete Dust and Noise

Concrete removal can generate significant dust and noise, which can be disruptive to you and your neighbors. Here are some tips to minimize these issues:

1. Use water to suppress dust. A light water spray on the concrete surface can significantly reduce airborne dust.
2. Work during appropriate hours to minimize noise disturbance.
3. Use dust collection attachments on power tools when available.
4. Consider using noise barriers or enclosures for prolonged projects.

Dealing with Reinforced Concrete

Reinforced concrete, which contains steel rebar or wire mesh, presents additional challenges during removal. Understanding how to identify and handle reinforced concrete is crucial for a successful removal project.

Identifying Reinforced Concrete

Reinforced concrete is typically used in structures that need to withstand heavy loads or tension. You may encounter this in foundation walls, driveways designed for heavy vehicles, or large slabs or structural elements. If you’re unsure whether the concrete is reinforced, you can use a metal detector or consult building plans if available.

Special Tools for Cutting Rebar

When dealing with reinforced concrete, you’ll need tools capable of cutting through both concrete and steel. Always be cautious when cutting rebar, as the exposed steel can be sharp and potentially dangerous. Options for cutting through steel include:

• Angle grinders with diamond-tipped blades
• Reciprocating saws with metal cutting blades
• Oxyacetylene torches (for larger projects)

Handling Broken Concrete: Tips and Techniques

Once you’ve successfully broken up and removed the concrete, you must handle the debris safely and transport it properly.

On-Site Handling and Loading

Use a wheelbarrow or heavy-duty car to transport broken concrete pieces, stacking debris neatly in the removal areas to maximize space. Use the proper lifting techniques to avoid injury, and consider lifting straps or a dolly to move heavier concrete sections.

Transportation and Off-Site Disposal

Secure the load properly using straps or tarps while avoiding overloading your vehicle or trailer. Drive slowly and cautiously, especially on uneven terrain or when carrying heavier loads. Be sure to contact your local disposal facility to get information on their requirements and fees.

Cost Considerations for Concrete Removal

The cost of concrete removal can vary widely depending on the project size, the tools required, and whether you choose to do it yourself or hire professionals.

DIY vs. Professional Services

If you have the time and physical ability, DIY removal can be cost-effective for small to medium-sized projects. However, it’s best to hire a professional for larger projects or those involving reinforced concrete.

Estimating Project Expenses

Before getting started, gather multiple quotes from professionals for large projects, and factor in the value of your time and effort when deciding between DIY and professional services. When budgeting for a concrete removal project, consider the following costs per Angi:

• Tool rental or purchase: $75–$150 per day for jackhammer rental
• Protective gear: $15–$60 for a complete set
• Disposal fees: $275 per ton, with a rental truck included
• Professional services: $2–$6 per square foot for removal and disposal

Our Conclusion

Breaking up and removing concrete is a challenging but manageable task with the right tools, techniques, and safety precautions. Whether you’re tackling a small DIY project or overseeing a large-scale removal, understanding the process and available options is the first step.

Remember to prioritize safety by choosing the appropriate tools for your specific project. If you’re unsure about any aspect of the removal process, you can consult with professionals or consider hiring a contractor. With proper planning and execution, you can successfully remove unwanted concrete and pave the way for your next home improvement project.