How To Repair Concrete Patio Surface

Every bit all contractors know, in that location are three indisputable facts near concrete: information technology's gray, it gets hard and unfortunately, it will deteriorate over time. There are a diverseness of culprits including freeze-thaw cycles, vehicle traffic, or everyday vesture-and-tear that cause driveway, patio, sidewalks, and other concrete surfaces to fissure, flake, spall, and flake. When the inevitable happens, contractors can address the problem chop-chop, finer, and affordably.

Before you lot bring in a large coiffure and ready-mix trucks to remove and supplant the concrete, consider resurfacing it instead.

Why Resurface?

"I've also found that having a few numberless (of resurfacer) on the truck can come in handy with unexpected jobsite concrete issues that demand to be handled speedily. Information technology'southward definitely helped me go along clients happy on more than 1 occasion."
—Thomas Werline, veteran contractor, finisher, mason

Resurfacing is a proven method of restoring the durability and appearance of dilapidated concrete by applying a thin layer of pre-blended, polymer-modified flowable mortar on top of an existing surface. Resurfacing physical is a significantly less expensive than replacing it. It costs betwixt $3.50 and $5.50 per square foot to break upwardly, haul off and pour a new slab of physical compared to only almost 25 cents per square foot to resurface concrete. In addition, the resurfacing procedure is less labor-intensive and less confusing than replacing concrete. Ultimately, resurfacing can produce a high volume of profitable concrete restoration jobs for contractors.

Contractor experience has shown that loftier-quality, well-formulated and properly applied resurfacers tin can extend the life of physical for years. While a multifariousness of factors contribute to the successful restoration of physical including proper surface preparation and application (both addressed later), resurfacing gives contractors several articulate and distinct advantages.

Resurfacers eliminate the time, labor, and expense to remove existing concrete and pour a new slab.
No special skills or training is required to apply a resurfacer.
Concrete restored with resurfacer can be open to vehicle traffic in one to ii days.
Resurfacers can be applied in a variety of thicknesses making information technology viable for many types of restoration repairs.
Beyond repair and restoration, resurfacers protect concrete to assist minimize maintenance moving forward.
Concrete restored with a resurfacer can be colored, stamped, and/or stained for added artful value.

Veteran contractor, finisher, and bricklayer, Thomas Werline of Orlando, Fla. has resurfaced physical on residential and commercial jobs of all sizes across the U.S. from New Bailiwick of jersey to California during the by 45 years. "In general, the power to make simple corrective improvements or perform full-scale restorations, depending on how thick the textile is applied, makes resurfacing concrete invaluable. The use of a concrete resurfacer like the 1 from QUIKRETE has proven very benign to contractors like me, particularly during the construction downturn ten years agone," co-ordinate to Werline.

Which Resurfacer Should Yous Apply?

The long-term viability of the restored physical is just every bit proficient as the resurfacer used for the job. Fortunately, new state-of-the-art polymer resin technology establish in next-generation concrete resurfacers has established improved standards for bail strength, workability, and working time. For example, tensile pull tests found that concrete volition really break before its bond to QUIKRETE Re-Cap Concrete Resurfacer, which features a proprietary combination of additives that stabilize the polymer motion-picture show to from a stable bond with the concrete surface. As a result, premium resurfacers allow contractors to finish more physical restoration jobs faster and without worry of time-consuming and plush callbacks. Another attributes contractors should consider when selecting a resurfacer include:

The resurfacer should have a compressive strength at least equal to the concrete surface being restored (at minimum iv,000 psi at 28 days).
The resurfacer should exist enhanced with polymers additives to increase tensile bond strength to at least 400 psi in seven days.
The resurfacer should accept loftier-early on strength exceeding 1,200 psi in one day then the concrete can be open up to traffic quickly.
The resurfacer should have minimal plastic and drying shrinkage to prevent corking.

Surface grooming is the almost critical step in successfully resurfacing concrete. Thoroughly cleaning the surface with 3,500 psi force per unit area washer to remove any deteriorated concrete opens upwards the pours in the physical, which help creates a strong bond with the resurfacer. The QUIKRETE Companies

How to Resurface Concrete

Surface Grooming

Start past confirming that the concrete surface is structurally sound, void of cracks larger than 1/four-in. deep or broad, and that whatsoever necessary surface repairs are fabricated. Surface preparation is the most critical step in successfully resurfacing concrete. It requires thoroughly cleaning the surface to include removing oil, grease, and other materials with acrid, detergent, or bleach solution. That is followed past thoroughly cleaning the surface with a 3,500 psi force per unit area washer to remove whatever deteriorated concrete and to open up the pours in the concrete, which help create a potent bond with the resurfacer. It is essential that control joints and expansion joints be maintained while preparing the surface with weather-stripping tape.

Pour the resurfacer onto the concrete in one-foot wide strips and scrub the material effectually the surface with a long-handled duster. Apply sufficient pressure to work the material into the surface pores and build to a nominal 1/8" thickness. The QUIKRETE Companies

Mixing, Application & Curing

Earlier placing the resurfacer, saturate the concrete with water and remove whatsoever standing water.

Earlier placing the resurfacer, saturate the concrete with water and remove any continuing water. The workability and long-term immovability of a resurfacer depends on the water content, and then follow the ratios recommended past the manufacture. A standard commercial-grade drill and paddle mixer is sufficient to mix a 40-lb. handbag of resurfacer with water in a 5-gallon bucket for three to four minutes. In this quantity, a premium resurfacer has near 20 minutes of working time, which is enough to comprehend 20 sq.ft at i/4-in. thick or ninety sq.ft. as a skim coat.

For larger jobs, six to eight bags of resurfacer tin can be mixed in a mechanical mortar mixer, simply a iii to five-person crew will have to get it poured and finished in less than xxx minutes.

Before placing the resurfacer, saturate the physical with h2o and remove any standing water. Cascade the resurfacer onto the concrete in 1-foot wide strips and scrub the material around the surface with a long-handled duster. Use sufficient pressure level to work the material into the surface pores and build to a nominal 1/eight-in. thickness. For hard-to-attain corners and edges utilise the resurfacer with a masonry brush. Avoid overworking the resurfacer.

5 minutes after applying the resurfacer, pull a physical finIshing broom across the restored concrete perpendicular to traffic to provide a textured, non-slip surface. Most of the time, the first glaze of resurfacer is sufficient to cover the existing physical surface. Still, if a second coat is required then permit the first coat to remain undisturbed until information technology tin can hold light foot traffic (for exact waiting fourth dimension, refer to datasheet of the product) and so use the second coat.

Resrufacer'south give contractors the power to make simple cosmetic improvements or perform full-scale restorations, depending on how thick the material is practical. The QUIKRETE Companies

Once the restored concrete has hardened, spray with a gentle mist for 24 to 48 hours subsequently applying the resurfacer to prevent plastic shrinkage cracks and premature stressing during the curing procedure. The appearance and immovability of the restored concrete surface is sensitive to external environmental conditions especially to the pelting thus protect the resurfaced area from rain for at least 8 hours later application.

One of Werline's most recent projects was to renew an uneven, heavily soiled, and unattractive concrete deck utilized for a large waste product container holding area at a Cardinal Florida school: "When it was suggested to pigment or stain the deck, I immediately recommended resurfacing the concrete. Afterward aggressively cleaning off the heavily soiled areas to prepare the deck's surface, the resurfacer went down fast and shine. The last bear on was finishing with a textured figure eight-swirl pattern to provide an bonny not-skid surface."

One of Thomas Werline's most contempo projects was to renew an uneven, heavily soiled and unattractive concrete deck utilized for a large waste container holding area at a Central Florida school. The QUIKRETE Companies

Resurfacing Concrete Tips

It's non possible to control external elements similar rain, temperature, and humidity during a concrete restoration project using a resurfacer. Yet, steps can be taken to assistance achieve optimal workability, durability, color consistency, bond strength, and other performance characteristics.

Mix, apply, and finish resurfacer when the ambience and surface temperature is between 50º F and 90º F.
Exercise not apply resurfacer in direct sunlight, or early on in morning, or late in the afternoon.
In hot temperatures saturate the concrete with common cold h2o and common cold temperatures saturate the physical with hot water.
Resurfacer practical in the cold conditions will cure darker due to longer memory of wet.

Homeowners in suburban residential communities don't want to be held hostage to gear up mix trucks clogging up traffic while 300 concrete driveways are existence removed and re-poured. Holding managers at the local town center don't want to explain to tenants why the parking lot tin't exist used for a calendar month considering the new concrete has to fully cure. Today, contractors are getting newly restored concrete open to foot traffic in eight hours and vehicle traffic in 24 hours at a fraction of the toll of replacing the surface. Yes, physical will deteriorate, simply contractors tin can bring it dorsum to life by resurfacing.

Werline adds, "I've also constitute that having a few bags (of resurfacer) on the truck tin can come in handy with unexpected jobsite concrete issues that need to exist handled quickly. Information technology'due south definitely helped me keep clients happy on more than one occasion."

Near the author

Ojas Arum Chaudhari was a Research Scientist in the Production Development group at The QUIKRETE Companies. He currently works at the Research Institutes of Sweden, located in Stockholm, Sweden.

Originally published November 2022.