Spongy rot, primarily caused by moisture-loving Basidiomycota fungi, poses significant threats to wooden structures. The most effective prevention strategy combines moisture control with specialized fungicidal treatments. Maintain wood moisture content below 20% through proper ventilation and waterproofing systems. Apply borate-based preservatives like Disodium Octaborate Tetrahydrate (DOT) which penetrate deep into wood fibers, creating long-lasting protection against fungal colonization. For existing rot, remove compromised material completely before applying epoxy consolidants to strengthen remaining wood. Copper naphthenate treatments provide exceptional protection for outdoor structures, while glycol-based fungicides offer superior penetration for indoor applications. Implement preventive measures during construction by using pressure-treated lumber and creating adequate drainage systems. Regular inspections every six months help detect early signs of deterioration, allowing for timely intervention before structural damage occurs. Combining these methods creates comprehensive protection against spongy rot, significantly extending wood's lifespan while maintaining structural integrity.