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On average, a quality exterior brick stain can last between 10 and 20 years, and sometimes even longer. While it will look its best for a minimum of three to five years, its total lifespan depends on several factors. These include the quality and type of stain used, the condition of the brick, and the thoroughness of the surface preparation, such as proper cleaning. Following the manufacturer's application instructions and applying a sealant as a final step is also crucial. The stain's longevity can be affected by your location, climate, and the brick's exposure to harsh weather, high traffic, and other elements. Over time, the stain may begin to fade or look dingy due to weathering, erosion, dirt, and debris. Compared to paint, brick stain generally has a longer lifespan.

Solid brick structures can last a century or more, potentially 100 to 150 years with proper maintenance like tuckpointing. Without major repairs, classic red bricks may last 20 to 40 years. Brick veneer siding is also a long-lasting material, with a lifespan ranging from 50 to 100 years, provided it is properly installed and maintained. To maintain brick veneer, you should scrub it annually with a special detergent and a soft-bristled broom. It's also important to inspect the bricks and mortar regularly and hire a masonry contractor for any necessary repairs, such as fixing worn mortar or bowing bricks.

Painted exterior brick does not usually need sealing. Brick is a porous material, so you don’t want to apply a sealant that could trap moisture inside the bricks and cause erosion and structural damage. The risk of moisture-induced damage after sealing is higher in colder climates where trapped moisture can expand if it freezes. On the other hand, it makes sense to seal really old brick or kitchen backsplashes, where moisture from cooking can weaken the brick.

While painting can certainly change the look of a chimney, you should think twice about giving your brick chimney the old landlord special.

Painting brick is porous, meaning it’s full of tiny holes that can soak up moisture. Those holes also allow it to dry, though. So, when you paint it, you trap any moisture inside, providing an opportunity for mold, mildew, and water damage.

Paint also shows wear faster than naked brick. This means that once you paint a brick surface, you’ll have to keep painting it to maintain a clean look. A paint job is also harder to undo on brick because of its porous nature. Once you paint it, it’s hard to go back without some serious power washing—another added cost.