How To Clean Metal Roof Before Painting

To remove algae and moss growth from the roof dissolve one cup of ammonia for every 5 gallons of water used and work from the top to the bottom.

How to clean metal roof before painting.

Most of these substances can be removed by a mixture of cup tri sodium phosphate and 1 gallon of water. Use a cloth or sponge to clean. Now take a soft brush dip it into the solution and start scrubbing the areas affected by mold and mildew. Beginning at the bottom portion of a panel section wipe in a left to right motion until clean.

When a panel section is clean rinse the washed panels with fresh water. To remove difficult algae spots use only a wet cloth sponge or low pressure washer. For every part water combine 0 05 part mild dish or laundry detergent. Soak a heavy cloth or sponge with glasswax.

Opt for something soft to protect your roof s paint and parts. Mix water and mild detergent for stubborn areas. For any areas that don t wash away with pressurized water fill a bucket or other container with water. Then rinse the area with water thoroughly.

Remove the particles or pieces that are causing the rust stains. If a panel becomes difficult to clean continue rubbing longer but do not increase pressure. Use a rag to apply to affected spots and use circular wiping motions. Pine sap decaying leaves and even road dirt that s drifted into the air can settle on your metal roof and stain it.

To remove severe rust stains. Tsp is available in most paint or home improvement stores.