By Prime Time Shine Exterior Cleaning
A common starting point is every one to three years
Many Wisconsin homes fall somewhere in that range, but exposure matters more than the calendar. North-facing walls and areas behind trees can look ready well before sunny, open sides of the same house.
Conditions that shorten the interval
Moisture, shade, tree cover, pollen, nearby water, road dust, and limited airflow all encourage visible buildup. Vacation homes can also go longer between inspections, allowing small issues to become obvious by the next visit.
- Green or black organic growth
- Heavy webbing and insect residue
- Roof or gutter runoff lines
- A planned sale, paint project, or seasonal opening
Wash for condition, not just appearance
A professional inspection can distinguish washable buildup from oxidation, failed paint, water intrusion, or permanent staining. Cleaning earlier is often easier than waiting for thick growth, but the surface should always decide the method.