How long does semi-gloss paint last?

Semi-gloss paint is one of the longest-lasting interior paint sheens because of its high resin content, which creates a hard, durable, moisture-resistant film. In ideal conditions, a quality semi-gloss paint job on interior trim, doors, and cabinets can last 5 to 10 years or even longer before it needs repainting for performance reasons, though it may show wear, yellowing, or scuffs sooner in high-traffic areas. On walls in kitchens and bathrooms, where it resists humidity and scrubbing, it often lasts 5 to 7 years. Its longevity depends on several factors including the quality of the paint brand, the surface preparation, whether primer was used, the number of coats applied, exposure to sunlight, moisture, grease, and how much physical abuse it takes from cleaning and contact. Oil-based semi-gloss tends to yellow over time and become brittle, while modern acrylic latex semi-gloss resists yellowing better. Exterior semi-gloss on doors and shutters typically lasts 3 to 5 years due to UV exposure and weather. If you maintain it well, clean it gently, avoid harsh chemicals, and touch up chips promptly, semi-gloss will remain washable and durable for many years.