This video is a comprehensive DIY tutorial on repairing a vertical foundation wall crack using a two-part epoxy injection kit. The process begins with extensive preparation, including chipping away a previous faulty mortar patch and grinding a V-groove along the hairline crack to ensure optimal epoxy penetration—a step the host recommends despite it not being required by the kit instructions. The core of the repair involves applying a two-part epoxy paste to the surface to seal the crack and mount injection ports. The video's central lesson emerges during the injection phase when the liquid epoxy leaks through a pinhole in the surface seal. This critical mistake is resolved on the fly using a high-adhesion sealant tape. The host concludes by emphasizing the significant cost savings of this DIY method compared to a professional service and reiterating the crucial importance of creating a perfect, airtight surface seal before injecting the epoxy.
DIY Foundation Crack Repair: A Step-by-Step Guide with Lessons Learned
0:00:01 The DIY Approach: The video details a foundation crack repair, highlighting the significant cost savings of a DIY kit ($100) versus hiring a professional ($2,000).
0:01:43 Preparation is Key: The first step involves cleaning the crack of all loose material. The host opts to use a grinder to create a "V-groove," widening the crack's surface to ensure the epoxy can be injected effectively, even though the kit says this is not mandatory.
0:11:42 The Repair Kit and Process: The kit contains a two-part epoxy paste for sealing the surface, injection ports, and a two-part liquid epoxy for filling the crack. The process involves attaching ports along the crack and then completely covering the crack with the epoxy paste.
0:12:06 Applying the Surface Seal: The host mixes the epoxy paste and applies it to mount the injection ports every 12-18 inches. He then carefully spreads the paste over the entire length of the crack, creating an airtight seal that is left to cure for 24 hours.
0:19:42 A Critical Mistake Discovered: Before injecting, the host blows air into a port and discovers a small leak in the epoxy surface seal, foreshadowing a problem.
0:23:27 Injection Failure and Solution: As soon as the liquid epoxy is injected into the lowest port, it begins leaking out of the faulty seal. The problem is quickly fixed by applying a piece of high-adhesion sealant tape (Siga Fentrim) over the leak.
0:26:36 Key Takeaway: Ensure a Perfect Seal: The most important lesson learned is that the epoxy surface seal must be completely airtight before injecting the filler. Any leaks will cause the liquid epoxy to escape instead of filling the crack.
0:27:00 Final Result and Monitoring: After successfully injecting the entire crack from the bottom up, the repair is complete. The host plans to leave the wall exposed through a rainy period to confirm the repair is successful before finishing the basement.