Expert cleaners AC Lockyer and John Buchholz reveal the secrets to properly maintaining Hardie Board Siding, especially in challenging coastal environments. They break down why pressure washing damages this popular siding material and share professional techniques that sanitize surfaces while preserving their integrity.
• Hardie Board Siding offers the aesthetic of traditional wood without vulnerability to termites and wood-destroying organisms
• Coastal environments create unique challenges with constant moisture, salt spray, and UV damage accelerating deterioration
• North-facing surfaces typically suffer from mold and algae growth while southern/western sides experience UV damage and oxidation
• Pressure washing causes permanent damage to Hardie Board Siding, creating distinctive "Mark of Zorro" patterns
• Professional "soft washing" uses specialized chemicals (Trinity Mix) to achieve 99.8% kill ratio against organic growth
• Addressing oxidation requires a manual brushing technique similar to car detailing, not just chemical application
• Coastal homes should be cleaned every 12-18 months, while beachfront properties may need quarterly maintenance
• DIY cleaning is possible but time-intensive—what professionals can complete in 2-4 hours might take homeowners weeks
• Proper maintenance can prevent the need to paint Hardie Board siding for the lifetime of the home
Need professional help with your Hardie Board Siding? Visit our dealer locator map at SoftWashSystems.com to find a licensed professional in your area.