How To Clean Vinyl Siding

Vinyl siding resists most common household stains, but it will become dirty like any product exposed to atmospheric conditions. In areas not exposed to direct sun and rain, periodic washing with a soft bristle brush and clean water from a garden hose may be necessary to remove surface dirt. Chalk may also accumulate on the surface. This is a normal condition for pigmented materials exposed to the elements.  
For best appearance, clean vinyl siding at least once a year.  To remove soil, grime and chalk from your siding, use a garden hose, a soft bristle brush and a bucket of soapy water. (You can also use the solution described below in the section dealing with mildew.) To minimize streaking, wash the house from the bottom up. Thoroughly rinse the siding with clean water from a garden hose. Avoid prolonged or high pressure rinsing of open ventilated areas. Keep cleaning solution off surrounding fixtures and surfaces not scheduled for washing.  

Stubborn stains  
If you can’t remove especially stubborn stains using normal household detergents, request a cleaner from your siding contractor or your local building materials retailer. Always test any cleaner on an inconspicuous area before full use.

Mildew may be a problem in some areas, especially warmer climates with consistently high humidity. Mildew appears as black spots on surface dirt and is usually detected in areas not subjected to rainfall, such as under leaves and porch enclosures.

To remove mildew, prepare a solution as follows:
1/2 cup detergent (Tide, for example)
2/3 cup trisodium phosphate (Soilax, for example)
1 quart 5% sodium hypochlorite (Chlorox, for example)
3 quarts water

CAUTION: Greater concentration may cause damage
to the siding and soffit.

If the above solution does not readily remove mildew spots, ask your siding contractor or your local building materials retailer for a mildew cleaner. If you have any questions, please call us at (607) 785-8656 or send us an Email.

Additional information