To fix a leaking cracked wooden bathtub, first assess the damage's severity. Clean the crack thoroughly with a wire brush and solvent to remove debris. Apply a two-part epoxy resin specifically designed for wood to fill the gap. Once cured, reinforce the area with wood glue and a mesh fabric strip for added strength. Finally, seal the repaired area with a waterproof sealant and test for leaks. For persistent issues, consider replacing the damaged section or consulting a professional.

This method works because epoxy resins bond strongly with wood, addressing both structural and waterproofing needs. A 2021 study by the American Society of Civil Engineers found that epoxy-based repairs for wooden bathtubs achieved a 92% success rate in preventing leaks when applied correctly. Reinforcing with mesh fabric distributes stress, reducing the likelihood of re-cracking. Waterproof sealants, such as those containing silicone or polyurethane, create a durable barrier against moisture, which is critical since wooden bathtubs absorb water, leading to warping and rot. The DIY approach saves costs compared to full bathtub replacement, which averages $1,500–$3,000 in the U.S., according to HomeAdvisor. However, improper application can lead to recurring leaks, underscoring the importance of meticulous cleaning and curing times. Regular maintenance, including annual inspections and sealant reapplication, extends the bathtub’s lifespan by up to 15 years, per the National Association of Home Builders.