How To Clean A Metal Roof Before Painting

Repeat this process until the area is free of mold and mildew.

How to clean a metal roof before painting.

To remove severe rust stains. Remove the particles or pieces that are causing the rust stains. Then rinse the area with water thoroughly. Opt for something soft to protect your roof s paint and parts.

Tsp is available in most paint or home improvement stores. For any areas that don t wash away with pressurized water fill a bucket or other container with water. 5 parts water 1 part diluted hydrochloric acid or citric acid or muriatic acid or oxalic acid or vinegar. Use a cloth or sponge to clean.

Use a rag to apply to affected spots and use circular wiping motions. Mix water and mild detergent for stubborn areas. To remove difficult algae spots use only a wet cloth sponge or low pressure washer.