Repairing Guides

how to repair concrete floor in basement

by Josephine Baumbach Jr. Published 2 years ago Updated 2 years ago
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Apply a concrete patch to the crack, making sure there are no gaps or uneven areas. Smooth the patch with a putty knife. If the crack requires a second patch, then wait for the first layer to dry before applying the second coat. Seal the concrete patch and allow it to dry for several days.

How do you repair a crumbling concrete basement floor?

Prepare the crumbling area for a coat of new concrete. ... Create a slurry mixture by combining pure cement with water in a bucket. ... Apply a coat of the cement slurry mixture on your previously crumbled area, using a paintbrush. ... Cover the cement slurry with some of your concrete mixture.

What is the best flooring for a basement cement floor?

7 Best Basement Flooring OptionsPaint. (Under $10/sq. ... Epoxy. ... Tile. ... Rubber tile or rubber sheets. ... Vinyl planks or tiles. ... Sheet vinyl. ... Engineered wood flooring.

How do you repair a concrete floor?

0:472:35How to repair a concrete floor - U-CAN Ready to Use ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipForce the concrete patch repair into the space squeezing out any air bubbles and level the surfaceMoreForce the concrete patch repair into the space squeezing out any air bubbles and level the surface of the concrete in line with the surrounding.

How do you fill large cracks in concrete basement floor?

1:294:15How to Fix a Crack in Concrete | A DIY Guide - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd wedging it down inside the crack. Now if your cracks not that deep you may not need the backerMoreAnd wedging it down inside the crack. Now if your cracks not that deep you may not need the backer rod. Next you'll need a liquid crack filler I'm using this liquid cement crack filler from DAP.

Should you epoxy a basement floor?

Epoxy flooring protects your basement floor from moisture, preventing leaks or spills from seeping into the floor below and causing structural damage. Water sits on top of epoxy, making it easy to clean. Epoxy is also resistant to germs and bacteria, eliminating any mold or mildew issues for your basement floor.

Should I put a subfloor in my basement?

Subfloors are not always necessary but they are beneficial wherever they can be installed. They only come into play when you want to expand downward and make your basement a warm, livable space. If you don't plan to use the space, there is no need for a subfloor or floor covering.

Can you pour new concrete over old concrete?

You can put new concrete over old concrete. However, unresolved issues with your old concrete, such as cracks or frost heaves, will carry over to your new concrete if not taken care of. In addition, you must pour it at least 2 inches thick.

Should you fill cracks in basement floor?

The good news is most basement floor cracks are normal and don't need to be repaired. However, some cracks in the basement floor can let in water, moisture, and dangerous soil gasses (including radon).

How do you fix crumbling concrete?

1:305:16How To Repair Concrete | Pro Tips For Repairing Concrete - YouTubeYouTubeStart of suggested clipEnd of suggested clipAny loose debris from the damaged area with a wire brush and broom then you can use a caulk gunMoreAny loose debris from the damaged area with a wire brush and broom then you can use a caulk gun loaded with a masonry crack filler to fill the crack.

How can I fix a crack in my foundation myself?

Fix Concrete Cracks in 8 StepsStep 1: Repair a Foundation Crack With an Epoxy Sealer. ... Step 2: Block Out the Injection Ports. ... Step 3: Mix the Epoxy Sealer. ... Step 4: Attach the Injection Port. ... Step 5: Spread Sealer Along the Crack. ... Step 6: Inject the Epoxy into the Crack. ... Step 7: Seal Up the Injection Ports.More items...

Can you epoxy over cracked concrete?

Epoxy coatings cannot withstand the stresses associated with concrete cracks due to settling, dry shrinkage or other factors. Don't let the fear of cracks keep you from enjoying the benefits of epoxy; with a little prep and repair work, you can move forward with your epoxy project.

What do cracks in a basement floor mean?

Small cracks in the basement floor commonly result from shrinkage as the concrete dries, which pulls the concrete apart. These types of cracks can show up as long as a year after the basement floor is poured, depending on how quickly the slab dries and how humid the basement is.

Can vinyl plank flooring be installed over concrete?

Yes, and that's one of the questions we hear most often is about luxury vinyl plank (LVP). Most homes in Florida don't have basements so, rather than an actual concrete subfloor, the concrete is a slab-on-grade, meaning no basement floors and no walls.

Is vinyl or laminate flooring better for a basement?

When Is Vinyl the Better Choice? Vinyl makes up in durability for what it lacks in authentic appearance. Because of its superior moisture resistance, vinyl plank flooring can be installed where laminates can't, including basements, bathrooms, laundry rooms and mudrooms.

Can you put laminate flooring on basement concrete floor?

Laminate flooring can be installed over concrete, wood or carpet subfloor or other surfaces. Installation of good quality underlayment is highly recommended. Installing underlayment is easy but it has to be done precise to avoid any tears.

What do you put under vinyl flooring in a basement?

Vinyl floors under 4mm should be installed right over the subfloor. If you have any areas on a concrete subfloor with moisture concerns, it is recommended to use a vapor barrier underlayment that will not add any cushion to the planks.

How to fix a crack in concrete?

Brush a concrete bonding agent into the crack or hole. Bonding agent is a liquid that helps concrete stick better. Dip a paintbrush into the bottle and spread an even layer into the damaged area. Cover every part of the crack or hole. Then let the bonding agent dry for 1 hour.

What to do if water comes through crack in concrete?

If you mean that there's water coming through the crack, then you may have a damaged pipe beneath the concrete. Call a contractor or plumber to inspect the damage as soon as possible.

Why won't my mortar bond?

If the mortar is too watery, it won’t bond well. Add more dry mortar to make it thicker if you have to.

How to straighten a crack in a wall?

The bonding material won’t stick as well to rounded edges. Take a chisel and hammer and tap any rounded edges to straighten them out .

How much does cement all cost?

Cement-all is the best. It does not need a bonding agent, and is especially strong. It costs about $20 USD per bag at most hardware and home improvement stores. It was designed to fix driveways and cement stairs, and is easy to work with, but the area must be clean of all soap, oil and dust, and cannot be too smooth.

How to fix a crack in a wall?

Scrub the damaged area with a wire brush and water. Dip the brush in water and scrub every part of the crack or hole. This gives the bonding material a greater surface area to adhere to. Make sure you get all the edges, sides, and the bottom of the damaged area.

How to protect yourself from concrete dust?

Put on goggles, gloves, and a dust mask to protect yourself. This job sends a lot of dust and concrete debris into the air. Prevent injuries by wearing goggles and a dust mask. Protect your hands with a thick pair of work gloves.

How long to wait before walking on concrete patch?

For a texture, pull a damp push broom over the concrete. Wait at least 24 hours before walking on the patch and a week before driving on it.

What to use to smooth a wood surface?

When the surface loses its wet sheen and feels firm to the touch, smooth it with a magnesium or wood trowel, which won't interfere with curing.

Can you pour concrete into a hole?

Simply pouring wet concrete into a hole in your driveway, sidewalk, or basement floor won't make for a lasting repair. You have to prep the edges correctly and use the right materials.

What Causes Basement Concrete Floors to Cracks?

Concrete goes through a lot; cracking is inevitable, no matter how hard the best contractor tries, concrete will eventually crack.

What does it mean when a basement wall cracks?

Gaps between two walls like they are moving apart from each other. Cracks in the corners of the walls. Cracks caused by heaving is a sign of a more serious problem that should be taken care of by a professional foundation contractor. In some cases, the entire basement concrete floor will need removed and re-poured.

Are Foundation Cracks Serious?

Just like floor cracks, some foundation cracks are serious, while others are completely normal and won’t affect the structure of the home. Knowing what to look for is important.

Could Radon Gas Seep Through Floor Cracks?

Most basement floor cracks do not pose a risk of radon gas; however, if you live in an area that is known to have a radon gas problem, then chances are the gas could seep through your cracks and into the home. To find out if you live in a radon gas area, you could visit the US EPA (Environmental Protection Agency) website.

Why does my foundation crack?

The most common cause for foundation floors to crack is due to concrete shrinkage. Concrete is made up of water, aggregate (rock, sand, or gravel) and cement. As concrete dries, the water evaporates, causing the concrete to shrink a little and crack. These types of cracks are normal and shouldn’t be much of a concern.

How wide are concrete cracks?

The cracks caused by shrinking are usually only hairline cracks (less than 1/16″ or as wide as 3/32″), but these hairline cracks typically extend far beyond the surface.

How wide should a crack be in a basement?

Most cracks are not serious and can be sealed back up by the handy homeowner fairly easy. It is a good idea to seal any cracks that are at least 1/8 inch or wider to keep insects, moisture, and soil-borne gases from seeping up through the basement floor and into your home.

How to even out heaving on concrete slab?

Measure the amount of the heaving. Small differences in levels can be evened out by pouring an overlay across the existing slab. The Concrete Resurfacing Network suggests overlays of 1/16 to 3/8 inch are possible. Mix a mortar-type cement mix with mall or no aggregate and spread it across the old slab. Slabs where the heaving exceeds 3/8 inch are likely a candidate for slab removal and replacement, according to Service Magic.

Why is my floor uneven?

If the uneven floor is caused by portions of the floor sinking rather than rising, it can be jacked into place . Specialized equipment is used to pump mud under the floor to fill in areas where erosion or compaction has created voids, allowing the floor to sink.

Where are drain tiles installed?

Drain tiles are installed in a trench either just inside or outside the foundation wall. Sump pumps are placed in sump holes at a level below the concrete floor. Concrete heaves when the soil moisture below it freezes and expands.

Can you repair a heaved basement floor?

Repairing uneven or heaved concrete basement floors can be a challenge. In some cases the "repair" for the problem may be the removal of the floor and pouring a new slab. Smaller heaves can be repaired in other ways. The first step is always to determine the cause and implement a solution to the heaving problem. Advertisement.

How Do You Fix Cracks in a Basement Floor and What Does it Cost?

Depending on the size of the crack, repairs could cost as little as $7-$10 for a tube of elastomeric caulk or as much as $14 to $18 per sq/ft for concrete replacement.

How long does it take for a concrete floor to crack?

Small surface cracks, aka hairline cracks, are common and nothing to worry about. They are the first to show up – often within a year of when the concrete floor was poured. As the concrete fully cures over months, minor shrinkage causes the surface to crack.

How to tell if a concrete slab has a hairline crack?

Hairline cracks are jagged, straight or a bit of a jumble. The concrete remains level – no sinking or rising of the slab in the vicinity of the cracks.

What is the term for cracks in basement floor?

Major cracks in basement floor sections should be addressed. For serious damage, the sunken section should be raised, often called slab-jacking or mudjacking. Or it should be broken up, removed and replaced.

What is a slab jacking?

Slab-jacking – Material, often polyurethane foam, is injected through holes drilled into the slab. The material is under enough pressure to raise the concrete slab back into place.

Why does concrete crumble when poured?

This problem won’t affect the structure of the floor, but it does indicate the concrete had too much water in it when poured. Water rises in the mix and weakens the surface, so it crumbles under weight. If spalling occurs in a floor you paid to have installed, call the contractor and expect them to provide the remedy at their cost – usually a resurfacing of the floor.

Can you spall a slab?

There is no perfect fix for spalling short of tearing out the slab and starting over. Since that’s not gonna happen – and there is no need for it – you’ve got the same choices as those for dealing with minor cracks which is to say resurface your concrete or install a floor covering using, typically, a basement floating floor system.

Why is my basement floor cracking?

Most often a basement floor crack is a result of wear and tear. But if you notice a heavily cracked area or a crack that runs parallel to the foundation, then the issue may be the result of structural damage. Start by removing debris, such as loose pieces of concrete that may be wedged within the crack.

Why tile a basement?

A tile floor in a basement allows for the easy cleanup and durability that are necessities for many homeowners when finishing a basement .

How long does it take for a crack to dry before sealing?

Seal the concrete patch and allow it to dry for several days. Certain cracks may be the result of structural damage and might require the help of a professional engineer or foundation specialist.

Can you fix cracks in a basement floor?

Fixing cracks in your basement floor doesn't have to be a difficult process. Learn how to make simple repairs with this step-by-step guide. Most basement floors are made of concrete and, while it's definitely a durable material, repairs will be necessary every now and then.

Is concrete flooring good for basements?

Basements Concrete Flooring Maintenance Materials and Supplies. Most basement floors are made of concrete and, while it's definitely a durable material, repairs will be necessary every now and then. The good news is that when planning a basement remodel, most repairs can be achieved with a few tools and materials.

Do you need to repair a crack in a basement?

Even the most stable of basements will sooner than later need to be repaired, especially when it comes to basement crack repair. Here's a quick do-it-yourself guide.

Can laminate flooring be waterproofed?

In fact, most cracks only require the few simple steps shown in this do-it-yourself guide. Advancements in laminate flooring have allowed for waterproof options that are ideal for covering a basement floor. Learn more about laminate flooring in basements with this guide.

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