A concrete patio is prone to getting chipped around the edges. The edges are a bit more susceptible than the rest of the concrete patio as they present an obtuse angle which magnifies the impact of the overlying pressure. A chipped concrete patio can be easily repaired at home without the need to employ professional help. You need some basic supplies and a systematic approach to repair the concrete patio, as explained below.
Step 1 - Preparing and Cleaning Patio Edges for Repairs
It is critical that you clear the chipped edges of all debris that can hamper the repair process. To clean the surface properly, start by brushing with a metal wire brush. Small flakes of concrete are often embedded within the cracked patio edge. Scrape-out the concrete bits with a putty knife or a screwdriver. You can pressure wash the entire area to ensure that the loosened flakes are washed-off.
Aged patios often have stains of oil and other greasy items. Oily stains can hamper the bonding of the repair material. You need to clean such stains with solutions containing trisodium phosphate. If the edges are chipped in multiple locations, at a small distance from each other, it is better to clean and flatten them with a sandblast. End the cleaning process by vacuuming the dried, cleaned patio surface.
Step 2 - Basic Repairing with Bonding Agent
Unseal the latex bonding agent. Cover the inside and outside surface of the voids in the patio edge with the bonding agent. The agent should be uniformly smeared all over the repair surface. You can use a paintbrush for this purpose. The bonding agent takes about 30 minutes to dry, after which it should appear like a thin film.
Step 3 - Comprehensive Repairing with Patching Compound
The patching compound lends stability to the repair surface and protects the cracked edges from further damage. Mix the concrete patching compound according to packaged instructions. Insert and spread the compound within the chipped edges. Use a trowel for this. Always apply the compound in two layers. Ideally, you should wait for the first layer to dry before applying the second. If you feel that the cracks are very deep and need further strengthening, insert some epoxy paste into the cracks. For this, insert the epoxy tube inside the caulking gun for easier application. Please note that epoxy caulking isn't applicable for chipped edges with very small holes since the caulking material isn't thin enough to be pushed into tiny cracks.
Step 4 - Consolidating Repaired Patio Edges
Put a plastic sheet or tarp around patched edges. Ensure that there is no traffic over the repaired edges for at least a week. The tarp sustains the minimal moisture that is needed for better setting of the repair materials. If the repaired surface is a bit puffed-up or warped, wet it slightly and smooth it with the sharp end of the trowel.
Step 5 - Finishing Repaired Concrete Patio Edge
Finishing the repaired edges is an option since epoxy color coats can be quite expensive, particularly when bought in small volumes. However, the epoxy color coating protects the repaired surface from excessive moisture seepage and helps to camouflage it. Apply the epoxy color paint with a brush-roller.