Moderate Dirt
For moderate dust and dirt, spray with clear water using a garden hose. Use a soft-bristled brush such as a long-handled car-washing brush to lightly scrub dirt that doesn’t easily rinse off. Pay attention to areas under eaves, porches, awnings and other overhangs that rain can’t reach.
Heavy Dirt
For heavy and industrial dirt, spray with clear water using a garden hose then lightly scrub the dirt with a soft-bristled brush dipped in soapy water mixed with Trisodium Phosphate. Rinse thoroughly. Wear gloves to protect your hands.
POWER WASHING
If you want to power wash your vinyl or aluminum siding, please read your power washer instructions carefully before you begin. When cleaning, hold the power washer straight at eye level. Don’t aim the washer upward as the water may collect behind the siding and cause leaks, streaks and decay. Use a 40-degree tip and set the pressure between 1,500 and 2,400 PSI.
Dirt-Removing Recipe*
1/3 cup Laundry Detergent such as Tide®
2/3 cup Trisodium Phosphate such as Soilax®
1 Gallon Water
Mildew
Mildew, which typically appears as black spots, can collect on all types of building materials. It’s easy to remove when scrubbed with a soapy solution of Trisodium Phosphate and Sodium Hypochlorite. Rinse thoroughly. Wear gloves to protect your hands.
Mildew-Removing Recipe*
1/3 cup Laundry Detergent such as Tide®
2/3 cup Trisodium Phosphate such as Soilax®
1 Quart Sodium Hypochlorite 5% Solution such as Clorox®
3 Quarts Water
Caulking Compounds, Tar and Similar Substances
Apply mineral spirits directly to the substance. Afterward, rinse the area thoroughly with water. Wear gloves to protect your hands.
*CAUTION
*Exceeding the recommended concentrations of cleaners can damage your siding and accessories. Avoid skin and eye contact with the solution, and in all cases follow the manufacturer’s instructions. Don’t use abrasive-type cleaners and strong solvents. Test any cleaner on an inconspicuous area before applying to major areas. To minimize streaking, clean from the bottom up and rinse with clear water. Scrub lightly. Excessive scrubbing can harm the finish.