Cover plants and landscaping near the patio with tarps to protect them from cleaning solutions and water run-off.
For best results, repair cracks in completely dry concrete. If the concrete is slightly damp, dry with a blow dryer or heat gun, then wait fifteen minutes. If more water has seeped into the crack, protect the concrete from water until it dries on its own. [2] X Research source Sand down grout- or concrete-based fillers with fine sandpaper, then clean the area a second time. (Do not sand self-leveling or latex-based sealants).
Borrow a power washer from a neighbor or rent one from a tool rental company or home and building store if you don’t have one of your own. A pressure washer will be very useful for cleaning and rinsing your concrete patio prior to painting. To clear a large amount of vegetation, spray a broad-spectrum herbicide such as glyphosate (Roundup) at least two weeks before cleaning.
Read all safety information before you begin. Many concrete cleaning products require everyone in the area to wear rubber gloves, eyewear, masks, rubber boots, and protective clothing. Rinse the concrete so the surface is wet. Apply your cleaning solution (acid, trisodium phosphate, or other cleaner) as per the manufacturer’s instructions. Scrub the concrete with a stiff brush. If you use muriatic or phosphoric acid, this process is called etching, and will ensure the concrete has a sandpaper-like texture that paint will stick to better. Etching should be done before painting new or bare concrete.
If you used an acid solution to etch the concrete, neutralize the pH on the surface by sprinkling baking soda over top before rinsing. [8] X Research source Especially after etching, be sure to rinse the concrete with water until no chalky powder comes off the surface when you touch it with your fingers. [9] X Research source
Take an 18-inch by 18-inch square of aluminum foil or thick plastic and tape down all four sides, sealing the square to the concrete with tape. Wait 16 to 24 hours. After that time, carefully remove the square of foil or plastic and check the concrete and the underside of the square for condensation or moisture. If the concrete is still damp, wait until weather allows complete drying. Protect the area from sprinklers and garden runoff. Proceed once the concrete is completely dry.
Concrete paints that contain sealants or waterproofing features, so the paint is designed to resist water, salt, oil, and grease. This is a good choice for paint because it’s specifically designed for outdoor concrete and resistance to various substances and elements. Latex, water-based, or oil-based exterior paints that are designed for floor, patios, or porches. [12] X Research source [13] X Research source These paints are also a good choice, as they are designed for exterior use and are specific to withstand foot traffic. Masonry paints that contain added binders and epoxies. While it may bond well with the concrete, it won’t necessarily protect your concrete from the elements. Garage floor coatings with colorful additives to protect and decorate at the same time.
Choose an exterior-grade primer if you’re going to use one, and make sure it’s designed for concrete. Concrete primers are often called concrete, masonry, or bonding primers. Primer has a lower viscosity than paint, so it absorbs into the concrete substrate a lot better. Once it’s absorbed in, it creates a binder that the paint will stick to. If you don’t use a primer and there’s any moisture under your patio, the paint will peel right off. [14] X Expert Source Scott JohnsonLandscape & Design Consultant Expert Interview. 22 April 2020.
Square footage is determined by multiplying the length by the width of the area you are dealing with. Don’t worry if your patio isn’t perfectly square or rectangular: you just need a basic idea of the area you’re going to cover. Don’t forget to take into account whether you plan on applying multiple coats. A primer will reduce the likelihood of having to apply more than one or two coats of paint.
Primer (optional) and paint A paint roller frame and cover A paint tray Roller and brush extenders Masking or painter’s tape Thick and thin brushes Plastic or painter’s tarps
Start by applying primer with the brush around any edges or places where the patio touches other buildings or parts of the house. Use a roller or thicker brush and extender to apply primer to the rest of the patio. Apply in two different directions for even coverage.
If you are reusing your brushes, rollers, and trays, make sure you clean them well and let them dry before reusing them.
Attach your roller or brush to your extender so you can remain standing while painting. This will help prevent injury to your back, knees, and wrists. If you’re using a brush instead of a roller, ensure it’s big enough to cover a large area so that your paint doesn’t dry before you finish a section.
Apply each new coat in a different direction than the last, to ensure even coverage.
