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How To Fix Cracks In Concrete Patio

How Do I Fix It

How To Repair Cracked Concrete Patio Slab

So, what causes a patio to settle in the first place? Prior to the concrete being installed, the ground is prepared by compacting the earth underneath with heavy machinery. In most cases, this compacted surface will either be gravel or at least covered with a layer of gravel. These steps are taken to prevent the ground from settling under the weight of the patio installed above. However, sometimes settlement is inevitable due to weather conditions, namely rain water washing away the soil underneath. Also, sometimes the compacting is not done correctly or thoroughly enough.

The Best Way To Repair A Cracked Or Damaged Concrete Patio

Unfortunately over time, many patios, verandas or other pavedconcrete areas begin to develop cracking, and very quickly the paved area willnot be an area where you want to spend much time or especially where you want tobe enjoying with visitors or friends either. So what are the best options fordealing with a cracked concrete slab?

To some extent, it depends on the extent and nature of thecracking itself. If the concrete has been correctly laid, there would normallybe some steel reinforcing mesh laid in the slab, which would normally ensurethat any cracks dont open up very much and avoid any significant mismatch inheight on either side of the cracking.

If the cracking is relatively insignificant and does notextend completely across the concrete slab, you can probably use some type ofpatching material to repair the cracks. Theres a wide variety of patchingcompounds available either online or through your nearest home center, but thebetter products will always be those which remain somewhat flexible over time.The reason being that although your repair job might look great immediately afteryou have finished it, over time the cracks may continue to open further and beforevery long, youll find that once again you need to make some repairs.

One solution might be to cover the concrete with outdoor carpet althoughyour choice of color is rather limited and outdoor carpet is not everyones cupof tea.

Trowel Down The Filler

If there are areas that fill the crack from side to side and are flat, they will not need additional tooling. For high areas, draw the putty knife in the direction of the crack to flatten the filler. For areas that appear low or have pockets, add more filler in those areas and then immediately trowel down with the putty knife.

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How To Repair Cracks In Poured Concrete Slabs

Every concrete slab has cracks. Due to the rigid nature of concrete, cracks are inevitable. Uneven drying, shrinkage, and temperature changes can all cause fractures in your slab. Once a crack develops, its important to seal it to prevent water seepage and further damage.

To clear up confusion and make this task as easy as possible, weve created a how-to guide for repairing cracks in your poured concrete slabs.

Standards For The Acceptance Or Repair Of Cracks In Concrete Floors In New Construction

How to Repair Cracks in a Concrete Patio

Settlement cracks may form a tripping hazard even if they are not traced to a structuralconcern. While there are few construction acceptance standards for floor slab cracking, one, “Quality Standards for the ProfessionalRemodeling Industry” NAHB, , recommends that cracks in basement floors which exceed 3/16″ in width or 1/8″ in vertical displacement should be repaired.The same standard provides that cracks in slab-on-grade floors shall not exceed 1/16″ in width or in vertical displacement. The same standardprovides that cracks occurring in control joints in concrete slabs are normal and acceptable.

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Concrete Patio Repair Costs

Fixing cracks, holes, pitting and performing proactive resurfacing and sealing avoids complete patio replacement costs of about $3,500. Filling cracks and holes are simple projects that only costs between $5 to $100. You can DIY the fix or hire a professional for as little as $300. Large repairs, where cement has sunk, cracked, or needs replacement, will cost about $5 to $20 per square foot, depending on the material type and the extent of the damage.

Concrete, regularly referred to as cement, is an affordable and durable material. Once concrete does crack, it can be simple to fix either by a professional or yourself. Sealing and cleaning can fix small pitting and hairline cracks while epoxy fillers will help with larger cracks. Patch kits can repair holes while a complete concrete top coat will refresh the look and longevity of your patio. If your concrete patio is still in excellent condition, apart from a few cracks, you can also install interlocking tiles on top. This will give you a fresh patio without demolition.

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How To Fix An Old Concrete Patio

Here is the before:

The patio was a mix of old red paint, gray original cement, cracks and holes. Can you say, mess?! After a good power washing and removing any loose cement, we added 23 gallons of the Concrete RESTORE.

The space is about 400 sq.ft. We bought the large 4 gallon buckets as well as the RESTORE roller.

Attach the roller with a long handled paint roller and simply dump the concrete/paint mixture and roll it on. It is SO easy!

How to repair a cracked and old cement patio

We picked the color Cape Cod Gray to have the RESTORE cement tinted to. There are so many colors available. I spread this entire 450 square foot area in about 2.5 hours. One important tip, do not roll it on like you would when painting a wall .

The directions say to use a paint tray ect. I simply dumped 1/4 1/2 of the bucket on the cement and worked in sections. When you spread the cement, simply pull it towards you or push away from you. Do not roll over back and forth. This stuff is very thick but easy to spread.

I highly recommend the special RESTORE roller.

Do not use a regular paint roller.

If you take a break in between, just wrap your roller in a plastic grocery bag. Thats what I did

Ok, now for the good part, here is how my moms patio is looking now!

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How To Inspect & Evaluate Cracks At Control Joints In Concrete

We discuss the recognition and significance of control joints in poured concrete slabs in detail at CONTROL JOINT CRACKS in CONCRETE. Just below you can read a summary of this topic.

The first photograph shows an expansion joint in a basement floor slab. Notice that we donot see other cracks in this slab.Shrinkage cracks that occur at control joints such as shown in the second, close up photo here, are occurring where they are supposed-to,although the width of this particular crack was surprisingly large. These cracks are not normally a defect in the slab but may bea source of water or radon entry into the building and may need to be sealed. Use a flexible sealant.

How To Fix Cracks In Concrete: 4 Best Methods

How to repair your Cracked Conrete and make your Patio look NEW!

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While concrete is a tough material, it does have its limitations. Over the course of several years, extreme temperatures and other conditions can cause it to warp, crack, degrade, and chip away.

Because of that, you might notice that your relatively new driveway already has some cracks in it. Fear not, because today we are here to help you learn how to fix cracks in concrete. We will cover four methods that will help you deal with cracks of all sizes

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Concrete Floor Covering Options & Ideas

;·4. Self-Leveling. Underlayments used as concrete flooring is the newest trend in concrete floor coverings. Self-leveling concrete has been a staple for repair and leveling of damaged or worn concrete. Until recently, another solid surface floor covering would be placed on top of the self-leveling material.

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Why Does The Concrete Patio Settle

In the first place, why does the concrete patio settle or sink? Before the concrete is installed, the ground is prepared and the earth is compacted using heavy machinery. Typically, the compacted surface usually comprises of gravel or it will have at least a layer of gravel. This is usually done to prevent the ground from sinking because of the weight of the concrete patio that is installed above.;

Settlement can occur because of weather conditions or the soil below it eroding due to rainwater. It may also occur if the compacting is not done thoroughly or properly.

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The Wrong Way To Repair Cracks

When repairing cracks in your concrete slabs, its crucial that you address the entire crack, all the way down to its deepest parts. Most DIY fixes fail because the homeowner performs a superficial fix. If you use a silicone caulk, your crack will seem to be fixed, but you havent stopped water from leeching in, and in a few years time, the caulk will come loose and peel away.

If at that point you dig out the caulk, you might try to fill the hole with hydraulic cement. This will also leave you disappointed. Hydraulic cement doesnt bond well with the concrete used for slabs. As time goes on, the rigid hydraulic cement will start to put off a white powdery substance, and moisture will seep in.

When you have a crack that needs attention, its important that you either do the job correctly and use the right tools or hire a professional to take care of it for you. If you try a quick fix or skip steps, youll be back where you started in just a few years.

Can Cracked Concrete Patio Be Repaired

How to fix a crack in your concrete patio

;·Also Check: How To Attach Patio Cover To House. A Repair For Cracked Concrete That Almost Looks Perfect. Q: Tim, I need to replace a cracked section of my concrete driveway. My primary concern is matching the color and texture of the new patch to the existing driveway. It doesnt need to be perfect, just close. How does one accomplish this?

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How To Fix The Cause Of Hairline Cracks In A Concrete Patio

Concrete is ultra-durable, which is why its a mainstay in patio walkways. However, it is still vulnerable to damage, which may manifest on the surface in the form of cracks and splits.

Hairline cracks are normal with concrete patios. Find out below how to fix them, and why calling in a professional is always advisable.

Get Safe Smooth Concrete Surfaces For Your Home

Uneven, cracked concrete is unsightly and unsafebut theres no need to put up with that problem. Our friendly, professional team will help you get your driveway, walkways, steps and patio flooring back in tip-top shape. Youll love how our High Density Polyurethane Lifting Foam makes your concrete look and perform beautifully.

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Is It Normal For Concrete Floor Slab To Crack

Yes, concrete floor slabs crack every so often, typically, by 0.5-inches for every 100-feet. As such, no need to worry if you come across very narrow slab cracks. However, should you spot cracks that are significantly wider than 0.125 inches, then your floor slabs structural integrity could be compromised and require some repair works?

There are three major types of concrete slab cracks

  • Plastic shrinkage cracks,
  • Drying shrinkage cracks,
  • Structural cracks.

Its important to recognize which type of cracks youre most likely to develop on your slab, as each has its own control measures.

Concrete Hairline Crack Repair

How to repair cracks in concrete patio and deck.

Start your repairs on a cool, dry day, around at least 50 degrees Fahrenheit. This ensures that the concrete is not too hot to work with.

Clear the crack of any debris and loose concrete with a hammer and chisel; once the debris has loosened, remove the broken pieces with a slotted screwdriver. Pull out any weeds or grass that might have started to grow in the crack. Once clear, clean the area thoroughly with a pressure washer set to low and a concrete outdoor cleaning solution. Remove any dirt, stains and mold from the area, then wait for it to dry completely before proceeding.

Following the manufacturers instructions, prepare the masonry mix and apply it to the crack with either a trowel or putty knife. Eliminate air pockets by firmly pressing down the product. Then, smooth out the surface so it is level with the concrete by scraping away the excess. Finally, let the filler cure as directed before you drive or walk over the surface.

Things You Will Need

  • Complete concrete repairs when the temperature of the concrete is at least 50 degrees Fahrenheit.
  • Avoid driving on the driveway for a week to allow the patch to set completely.
  • Use protective kneepads if you have long cracks that require you to be on your knees for long periods of time.


  • Use protective eyewear if there is a lot of debris to clear from your driveway, particularly if you use a blower to clear debris from the crack.

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Avoid Safety Hazards: Fix Cracked Uneven Concrete Now

Its easy to underestimate the eventual damage a single crack can do to concrete. You might even walk over and not notice them, but at some point, a driveway or sidewalk crack could be a major safety hazard, causing injury and even death. Making sure that the concrete around your home is safe is important for avoiding trips and accident liability.

One of the most effective ways to correct cracked or uneven concrete is by using polyurethane lifting foam. Compared to other alternatives, this method has great benefits that make it highly appealing. But before we look at how this game-changing solution benefits your walkway or driveway, lets first look at what can cause concrete damage.

A Repair For Cracked Concrete That Almost Looks Perfect

Q: Tim, I need to replace a cracked section of my concrete driveway. My primary concern is matching the color and texture of the new patch to the existing driveway. It doesnt need to be perfect, just close. How does one accomplish this? Ive read your past concrete repair columns, so I understand how to mix, place and finish the concrete. Also, what do contractors use to paint the concrete to make it white?

Donn R., Clemson, S.C.

A: Many readers may be facing the same conundrum as Donn. Maybe theyre trying to match a wall stucco patch. Or perhaps they want to repair the mortar between brick on a home.

Im sure everyone has seen garish repairs where the new patching material stands out like a red wine stain on a white blouse. Its possible to get close when doing these types of masonry repairs, but its next to impossible to get a perfect match. If youve got patience and many dont you can really come very close to achieving perfection.

My advice is to do a thorough cleaning of the concrete before you start. You can accomplish this using a pressure washer equipped with a 15-degree tip at the end of the wand. Cleaning the concrete allows you to see exactly what you’ll be matching.

Pay attention to the different colors of the sand as well as the grain size. You may have to mix sand from different sources and blend them to get a close match. You have to get the sand right.

Read more:

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Can You Pour New Concrete Over Old Cracked Concrete

You can always pour new concrete over your old cracked concrete. However, the frost heaves and cracks on your old concrete can move to your new concrete. Additionally, you should pour at least 2-inch thick of the new concrete for effective results.

There are specific instances where we recommend that you pour new concrete over an old one and include:

  • On the driveway or basketball court
  • On the pathway to your house or stepping stones

However, there are certain instances where we wouldnt recommend you to pour new concrete over an old one and include:;

  • In situations where tree roots are on the way
  • If there is a staircase or door on the way
  • If the concrete isnt level or there are substantial cracks

Frost Heaves Or Expansive Soil Cracks In Poured Concrete Slabs

How to Repair Cracks in a Concrete Patio

We discuss the recognition and significance of frost heaving damage and cracks in poured concrete slabs in detail at Frost Heave/Expansive Soil Cracks in Slabs. Just below you can read a summary of this topic.

Frost heaves or expansive soils damage to building floor slabs can range from minor to extensivein buildings depending on soil and weather conditions, site preparation, and slab construction details, as weelaborate here.

The photograph above shows a rather straight crack across a garage slab near the garage entry door.What is happening here and why is this particular crack straight if it’s a frost or soil heave crack?

In freezing climates building foundations include a footing which extends below the frost line. Thisis true for both the occupied space as well as garages. When a concrete slab is poured either abuttingthe top of such a foundation, or poured extending over the edges of such a foundation, there isrisk of cracking across the concrete at the interior edge of the buried footing.

Similar floor slab damage might occur in areas of expansive clay soils if the propermoisture level is not maintained.

Basement floor heave patterns – frozen floor drains:Basement floors can be frost heaved in other patterns in buildings which areunheated or which lose heat. We have found basement floor slabs broken and heavedabove buried drain lines which ran below the basement floor of a home whichremained unheated during freezing weather.

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