Best Pour Concrete Over Concrete?

If you’re thinking about how to pour concrete over concrete, you should first ask yourself whether or not it’s necessary to do so. It may seem like the easiest way to fix an old patio or driveway, but it can actually be very expensive and a lot of hard work, especially if you don’t know what you’re doing! Before starting this kind of project, make sure you check out this guide on Can You Pour Concrete Over Concrete? to learn everything you need to know about how to pull it off in the best way possible!

What is concrete anyway?

Concrete is a material that’s used for construction. It’s made with cement, water, and sand. The mixture must be poured immediately after it’s mixed to avoid losing strength from drying out. However, you may have heard concrete blocks can be stacked and glued together in order to construct a wall or form other structures. But can you pour concrete over concrete? No!

When to use it?

If you’re ready to redo a concrete driveway or patio, you might be curious about how to pour fresh concrete over existing concrete. It can be done, but it’s not ideal for all situations. Read on to learn more. For many homeowners, replacing a damaged sidewalk or patio is as simple as getting down on their hands and knees with a hand trowel and bucket of premixed concrete—and that’s fine if they want their project to look like a DIY job and last five years at most. But others want to use poured-in-place concrete in applications where longevity matters.

How much does it cost?

Pour Concrete
Pour concrete over concrete

In short, yes, you can pour concrete over existing concrete—as long as it’s not load-bearing. The rules for pouring concrete floors and walls are a little different than for pouring normal foundations and structures. If you want to follow city codes or if you’re building an actual structure that needs to bear weight (not just filling in an old one), then you should talk to a professional first.

Can You Fill Potholes with Concrete?

If you can’t avoid a pothole, do yourself and your car a favor by simply driving around it. If you can’t, there are a few ways to repair them. Using hot asphalt will cause your car to vibrate while driving over it, but it is effective at repairing large potholes. Smaller holes in roads can be filled with cold patch or concrete. However, pouring concrete on top of concrete isn’t recommended for safety reasons.

Attaching New Concrete to Old Concrete?

Before pouring a new concrete slab on top of an existing one, make sure you follow these steps to ensure they are firmly and securely attached. Doing so will save you a lot of headache in case there is any settling or cracking at a later date.


It’s a dirty job, but somebody has to do it. But how much cleaning is too much cleaning? The answer depends on what you’re trying to clean. For example, you can safely pour new concrete over old concrete; in fact, sometimes pouring new concrete over old is your best bet. Similarly, pouring mortar over existing mortar (between bricks or stones) is sometimes necessary—but only if there’s no risk of leakage or moisture damage from doing so.

Install a Bond Breaker:

If you’re pouring new concrete over old, chances are it’s because your current slab is cracked or damaged in some way. To ensure that your new slab does not suffer from a similar fate, use a cement bond breaker to create an effective barrier between old and new concrete. The most common kind of bond breaker is asphalt-based and can be purchased in roll form. When used correctly, you can pour new concrete right over an existing surface without worrying about its adhesion or safety.

Place the New Concrete:

Before you start pouring, check your subfloor and make sure it’s level. If it isn’t, use shims or fillers to create a level surface. You can also hire a professional flooring contractor who specializes in concrete floors to help with leveling issues. Next, mix your cement thoroughly by slowly adding water as you go. Once you have one good batch of concrete in your wheelbarrow, spread it on top of your subfloor until smooth and even. Then let it sit for about ten minutes. When your concrete dries, try stamping on it using both feet at once—if it feels hard but not brittle, you’re ready to move on!

Create Crack Control Joints:

One way to create a level concrete surface is to run horizontal and vertical control joints through it, so that as it dries, shrinkage cracks can be spotted early and smoothed over. These are called control joints and are typically 1⁄4 inches wide. They’re created using a groover tool that forms an indented line in the wet concrete, creating an impression or groove while allowing excess material to flow into place and self-clean.


Sure, you can pour concrete over existing concrete. However, pouring a fresh layer of concrete over existing concrete isn’t recommended and here’s why: Any holes in your underlying layer of concrete—say from corroded rebar or wire mesh from an earlier project—will act as a conduit for water to enter your new surface once it’s poured. This can lead to problems like spalling and cracking that will diminish the life of your new flooring.

Also read:- Pour Concrete Over Concrete

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