In the "How To Fix a Concrete Foundation Crack" video by This Old House, a substantial foundation crack is identified, attributed to factors like inadequate footing or expansion from winter water damage. The presenter outlines the comprehensive foundation repairs process to address this issue.
The initial steps involve preparing the crack by grinding its surface and thoroughly cleaning it with alcohol. The repair itself employs a low-viscosity resin injected through ports strategically mounted onto the wall.
A dam-like material bridges the crack, and a fan tip serves as a dam to facilitate the flow of grout behind it.
The outcome of this meticulous repair process is a robust concrete wall, potentially achieving a strength of 3000 psi. By the seventh day, the repaired section experiences a remarkable threefold increase in strength. After two days, the substrate is removed and ground to achieve a visually pleasing appearance. Notably, the final result surpasses the original wall in strength.
This video serves as a valuable guide, demonstrating effective techniques to fix concrete foundation cracks, ensuring not only structural integrity but also an aesthetically satisfying outcome. The step-by-step presentation underscores the expertise required for a successful repair, providing homeowners with insights into maintaining the durability and appeal of their concrete foundations.
