Concrete is known for its strength and longevity, but even well-installed slabs can crack. Rather than tearing out the entire surface and starting from scratch, repairing and/or resurfacing concrete is often a more practical and cost-effective solution.
Get a free quoteCracking can happen for several reasons. Improper installation, such as an incorrect water mix or failure to install control joints, can lead to cracks. Even when installed properly, concrete’s natural limitations can cause issues—while it has excellent compressive strength (resisting heavy loads), its tensile strength (ability to flex or stretch) is lower, which makes it prone to cracking.
Different cracks require different treatments, depending on their cause and severity. Here’s a look at common types of cracks and how to address them:
These fine cracks typically result from the natural shrinkage that occurs as concrete cures. They don’t indicate structural problems, but they still need to be repaired. Leaving them alone may allow moisture to penetrate and the crack can worsen over time.
Solution: Hairline cracks are typically filled with a crack filler or adhesive to prevent further moisture damage.
Often wider than hairline cracks, these are caused by the concrete drying too quickly or by using too much water in the mix. They usually appear in a random pattern.
Solution: Filling shrinkage cracks can often prevent them from spreading. In more severe cases, resurfacing the area might be necessary.
These occur when the ground beneath the concrete wasn’t properly compacted, or when heavy loads were applied before the concrete fully cured. These cracks are often wider and may be accompanied by sinking in the slab.
Solution: If settlement cracks are minor, grinding and sealing might solve the issue. For more extensive settlement, resurfacing or even replacement may be needed.
The most serious type of crack, these occur when the concrete’s integrity is compromised, often due to poor reinforcement or foundation shifts. They tend to be wider and deeper than other cracks.
Solution: Structural cracks may require significant repair or reinforcement. In some cases, it may be more cost-effective to replace the slab entirely.
By determining the cause of cracking, you can try to prevent future issues. Whether the cracks are caused by environmental factors (such as moisture or freeze/thaw cycles) or improper installation, different repair methods are required. For instance, cracks caused by corrosion in the steel rebar may require more than just a surface repair. A professional contractor can assess the problem and recommend the best course of action.
Here are some of the techniques our contractors use to repair cracked concrete:
If the concrete is still structurally sound, resurfacing is a simpler option, and it’s also more environmentally friendly. With resurfacing, rather than tearing out the old slab, a contractor prepares the surface then adds a new layer of material on top of the existing concrete. This method saves both resources and labor while also reducing waste.
The cost of repairing cracks varies depending on the type and extent of damage, and how you plan to address it. Small hairline cracks that you can repair yourself may only cost you the price of crack filler and tools. For more extensive or deep cracks, you’ll need a professional to assess the damage and provide an estimate.
While it’s possible to repair minor cracks yourself, it’s important to understand that the process requires specific materials and knowledge. Mixing products correctly and ensuring proper drying conditions are critical for a lasting repair. If done incorrectly, the crack can return and/or worsen. Hiring an experienced contractor ensures the job is done right, avoiding common pitfalls and ensuring a durable result.
SUNDEK of Austin works in all the major cities in the area including Austin, Bastrop, Cedar Park, Dripping Springs, Georgetown, Lakeway, Marble Falls, Pflugerville, Round Rock, San Marcos, Spicewood, and the surrounding areas.
Call us: (512) 928-8000
Email us: [email protected]
Get technical information, system guides, and more for all SUNDEK Austin products.
View the wide range of color options and brochures available through our various systems.
See outstanding SUNDEK projects from contractors across the country.
Useful tips to design and run your projects smoothly.
Find design cut sheets, system guides, tech-app sheets, specifications and more.