What Is Oxidation on Vinyl Siding and How Do You Remove It?

Fast Answer

Oxidation is a white, chalky film that forms on vinyl and metal surfaces from prolonged UV exposure. It can’t be removed with regular pressure washing—you need specialized cleaners and gentle agitation to restore the original color.

Why Does Oxidation Happen?

– UV rays break down pigments in siding

– Heat and moisture accelerate the breakdown

– Dust and pollen compound the effect by clinging to oxidized surfaces

What Are the Signs?

– Chalky residue when you touch the siding

– Faded or patchy color

– Streaking from gutter runoff

– House still looks “dirty” after a pressure wash

Can It Be Prevented?

You can slow it down by:

– Installing gutter guards to prevent tiger striping

– Keeping surfaces clean with regular soft washing

– Choosing siding with UV-protective coatings

What Products Remove Oxidation?

We use industry-grade oxidation removers designed for vinyl and aluminum. Avoid:

– Bleach

– Degreasers

– High-pressure rinses

– Hard brushes

These damage the surface or leave streaks behind.

Is Oxidation the Same as Mold or Dirt?

No. Dirt and mildew can be cleaned easily. Oxidation is damage to the surface layer—it requires chemical restoration, not just cleaning.

Want to know if your home has oxidation? Learn more or request an evaluation at elevationpowerwashing.com