How to Patch Drywall Like a Pro
Professional drywall patching techniques for holes, cracks, and water damage. Includes mud application, sanding, and texture matching.
Step-by-Step Process
Locate the Source of the Leak
Start with a thorough visual inspection of the basement wall from the interior. Look for damp spots, efflorescence (white mineral deposits), and active water trails. Use a moisture meter to map the wettest areas. If the leak is not visually obvious, perform a controlled hose test on the exterior, wetting small sections of the foundation at a time while someone inside monitors for new moisture. Mark the exact crack location with a pencil or masking tape once the source is confirmed.
Prepare and Clean the Crack Surface
Remove all loose concrete, dirt, and old sealants from the crack using a wire brush and a 4-inch angle grinder with a masonry wheel. For hairline cracks, use a crack-chasing blade to open the groove to roughly 1/4 inch wide and 1/2 inch deep so the epoxy can bond properly. Vacuum the dust completely with a HEPA vacuum. Wipe the surface with acetone or a concrete degreaser to remove any grease or oil that would prevent adhesion. The surface must be dry to the touch before proceeding.
Install Injection Ports and Surface Seal
Place surface-mounted injection ports (also called packers) every 6 to 8 inches along the full length of the crack, starting about 4 inches from each end. Use a hammer drill with a 3/8-inch masonry bit to make shallow holes if you are using mechanically anchored ports. Apply a thin layer of two-part fast-setting epoxy paste over the crack surface between the ports, sealing the entire crack flush with the wall. Do NOT seal over the port openings. This surface seal creates a contained channel so the injection resin will travel inside the crack rather than leak out.
Mix and Inject the Two-Part Expandable Crack Filler
Prepare the two-part low-viscosity epoxy or polyurethane resin according to the manufacturer's mix ratio — typically 1:1 or 2:1 by volume. Load the mixed resin into a manual or pneumatic injection gun. Begin injecting at the lowest port on the wall, pumping slowly until you see the material begin to ooze from the next port upward. Cap the first port and move to the next. Continue this ladder-style filling until every port has been injected and the crack is fully saturated from bottom to top. The resin expands slightly as it cures, locking into the void and creating a watertight structural weld.
Apply Carbon Fiber Reinforcement for Moving Walls
If the wall is actively moving, bowing, or shifting, epoxy injection alone is not enough. After the epoxy has cured for at least 24 hours, install carbon fiber reinforcement strips. Cut the carbon fiber fabric to length so it extends at least 12 inches above and below the crack. Mix the manufacturer's specified saturating epoxy and apply a base coat to the wall surface. Lay the carbon fiber strip over the crack, press it firmly with a roller to remove air bubbles, and apply a top coat of saturating epoxy to fully encapsulate the fabric. The carbon fiber provides a tensile strength many times greater than steel, locking the wall in place and preventing future movement.
Cure, Inspect, and Finish
Allow the injection epoxy to cure for 48 to 72 hours at temperatures above 50 degrees Fahrenheit. Remove the surface ports by striking them with a hammer or grinding them flush. Inspect the repair with a flashlight to confirm no voids or bubbles remain. If desired, skim-coat the wall with hydraulic cement or a waterproofing parge coat to create a smooth, finished appearance. For best long-term results, verify exterior drainage and downspout placement so water is directed away from the foundation.
Tools & Materials Needed
Frequently Asked Questions
About This Repair Method
Foundation cracks in poured concrete and block walls are one of the most common sources of basement water intrusion in the Oakwood, Georgia area. The combination of expansive clay soils, seasonal freeze-thaw cycles, and hydrostatic pressure after heavy rains creates the perfect conditions for cracks to form and propagate.
Two-part expandable epoxy crack injection is the gold standard for structural crack repair. Unlike surface caulking or hydraulic cement patches that merely cover the problem, epoxy injection actually restores the structural integrity of the wall by bonding the concrete back together at the molecular level. The low-viscosity resin penetrates deep into the crack, sometimes reaching the exterior face of the wall, and cures into a material stronger than the original concrete.
When the wall is moving — bowing inward, shifting, or showing signs of active settlement — carbon fiber reinforcement is the modern alternative to steel beam installation. Carbon fiber strips are bonded to the wall with a saturating epoxy, creating a composite reinforcement system that adds tremendous tensile strength without adding bulk. The strips are thinner than a credit card, do not corrode, and can be painted over once cured.
This video tutorial walks through the entire process as performed by a licensed foundation repair specialist. Every step is shown in real-time, with close-ups of the injection process, explanations of resin selection, and safety tips for working in confined basement spaces. Whether you are a homeowner trying to understand what a contractor is proposing, or a DIY enthusiast with significant construction experience, this guide provides the depth you need to evaluate and execute the repair correctly.
Your Progress
Last watched on May 31, 2026
1 video watched in total
Need a Pro in Oakwood, GA?
Foundation repair is not a beginner DIY project. Our licensed team handles epoxy injection, carbon fiber, and full waterproofing systems.
Service Details
Service Area
Oakwood, GA and Hall County
Warranty
10-year transferable warranty
Typical Duration
1–2 days per crack
Starting Price
$350 for epoxy injection
Still Have Questions About Your Foundation?
Every foundation is different. Our foundation repair specialists in Oakwood, GA offer free inspections and written estimates with no pressure.