How often should I have my house washed?

We recommend having your house washed once a year to maintain its appearance and protect the siding. However, if your property is located near a body of water, in a wooded area or heavily shaded, washing every 6 months may be necessary as humidity promotes mold and algae growth. On Montreal's North Shore, the humid climate and significant temperature variations accelerate contaminant buildup. Regular washing extends your siding's lifespan and prevents costly damage.