Whether your concrete patio was painted before you moved in or you painted it afterward to increase its visual appeal, you may find yourself having to look for help with paint flaking off the concrete patio. Although there are repair options, keep in mind that the necessary repair procedures are very time consuming. However, proper preparation is extremely important in providing a long-lasting and beautiful repair job.
Flaking paint on concrete patios is often caused by lack of proper cleaning during the preparation and bonding processes. Excessive moisture is also a cause, particularly with patios that are installed on ground level without a proper moisture barrier being applied. To inspect for excessive moisture, cover the suspected area with plastic tarp and secure it in place with tape or weights. Allow it to sit for two days and then inspect the concrete for signs of discoloration and moisture. If these exist, you will need to locate and repair the source of moisture before continuing. It is also important to note that older concrete patios will naturally flake and along with the concrete comes the paint. Another cause of flaking is the application of oil-based paints on an unfinished, unetched, or uncured concrete surface. When the concrete patio is not properly prepared for paint, the concrete alkaloids react with the oil-based components of the floor coating, a process called saponification, and create a soapy type of film that prevents the oil-based paints from properly adhering to the surface of the concrete, therefore leading to flaking.
Repairing the Concrete
Your first step to repairing the concrete is to remove all the layers of flaking paint from the surface. Using a wire brush or sand blaster, remove any evidence of paint from the surface. Using a trisodium phosphate (TSP) cleaner, available at your local home improvement store, thoroughly clean any residues, grease and dirt from the surface of the concrete. Be sure to vacuum all the remaining water from the surface to prevent water absorption into the concrete that will again cause flaking and peeling of the paint layer. You will need to use an acid etching compound to create a rough and porous surface on the concrete for an adequate bonding surface. Be sure to follow the manufacturer's directions exactly to prevent damaging the concrete surface. After you have etched the concrete, you will again need to vacuum up any residual moisture and chemicals left after the etching process.
Refinishing the Concrete
You will need to purchase and apply a quality concrete sealer to the masonry before beginning the repainting process to prevent any more moisture from seeping through the concrete and interfering with the bonding process. Allow the sealer to dry and apply a second coat if necessary. Then follow up with a quality coat or two of masonry primer. When purchasing paints to refinish the concrete patio, be sure to buy paints designed for outdoor masonry floors. If necessary, purchase an additive to create texture in the paint. When applied to paint, the additives create a slip-resistant surface on the concrete, preventing slips and falls. Apply paint in thin layers, allowing each coat to cure completely before proceeding to create a hard, durable surface that will prolong the life and appearance of the concrete patio.
How to Seal & Paint Concrete
Painting concrete can create vibrancy and mood to existing construction. Concrete must be completely dry and clean prior to beginning this process....
How to Remove Chipping and Peeling Exterior Paint
When it comes to exterior painting projects, many do-it-yourselfers underestimate the importance of proper preparation. The fact is: If you don't spend...
How to Repair Peeling Behr Concrete Stain
Peeling Behr concrete stain can be repaired fairly easily. Peeling problems are usually due to faulty surface preparation. Once the peeling and...
How to Remove Old & Peeling Paint
Chemical strippers, pressure washers and good old fashioned manual stripping with a paint knife all remove old and peeling paint, but only...
How to Fix Peeling Concrete
Concrete surfaces can peel if designed poorly. Under extreme duress—such as a deep freeze or extreme heat—excess water begins to loosen the...
How to Remove Peeled Paint From Concrete
Removing paint from any surface can be time-consuming, and concrete is no exception. Fortunately, if the paint is peeling away from the...
How to Repair a Flaking Concrete Floor
Flaking concrete is not a problem that will go away on its own. If fact, it takes fairly aggressive action to stop...
What Are the Causes of Peeling Paint on Concrete?
Painting allows you to dress up or alter the appearance of concrete walls, floors and structures, both inside and outside your house....