What is oxidation?
Oxidation occurs when the protective outer layer of vinyl breaks down from years of UV exposure, leaving behind a chalky residue that makes even clean siding look worn and aged. It's a natural process that affects virtually all vinyl siding over time, typically becoming noticeable after 10–15 years.
Our oxidation removal process
- Assessment of oxidation severity and siding condition
- Pre-treatment rinse to remove loose dirt and debris
- Application of oxidation-specific treatment solution
- Agitation and dwell time to lift the oxidized layer
- Final rinse and inspection
What results to expect
Results vary based on the age and condition of the siding. Mild to moderate oxidation typically responds very well, with significant color restoration. Severely oxidized or very old siding may show partial improvement. We'll give you an honest assessment during the estimate — if the siding is too far gone, we'll tell you upfront.
Where we serve
We serve Portsmouth, Exeter, Dover, Durham, Hampton, Stratham, Rye, North Hampton, Lee, Nottingham, Barrington, and all surrounding Seacoast communities, as well as Southern Maine and the NH Lakes Region.
Oxidation removal cost in NH
Oxidation removal typically runs $300–$600 for an average NH home, depending on siding square footage and severity. It's significantly less expensive than repainting — and results are often visible within hours of treatment. We provide a free estimate and an honest assessment of expected results before starting. If the siding is too far gone to respond to treatment, we'll tell you upfront.
How to tell if your siding is oxidized
Run your hand along the siding. If it leaves a chalky white or colored residue on your palm, you have oxidation. You may also notice the siding looks faded, dull, or patchy compared to shaded areas that receive less UV exposure. South-facing and west-facing sides typically oxidize faster than north-facing surfaces, so the difference is often visible by comparing sides of the house.
Related services
Oxidation removal is often paired with a full house soft wash to address both oxidation and any mold, mildew, or algae on the siding in a single visit.