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Yes, it is normal to see some minor hairline cracks in brick or mortar over time, often due to natural foundation settling. However, not all cracks are harmless. You should be concerned and contact a masonry professional for an inspection if you notice cracks that are getting wider or longer, or if new ones keep appearing. Other serious warning signs that can indicate significant structural or foundation damage include large vertical cracks (especially those that widen as they go up), stair-step cracks, L-shaped cracks, and deep horizontal cracks. Factors like temperature changes, moisture, and structural loading can also cause cracks to form or worsen.

Some older brick material is extremely hard, making it tough to create a hole. Rather than using a typical wood drill bit, always use a masonry drill bit when drilling into brick. For extremely hard brick, using a power drill with a hammer function may give you better results. The drill bit will heat up as it goes into the extremely hard brick, so you may need to stop after a few minutes and allow the bit to cool before starting to drill again.

When painting brick, each application method has pros and cons. Spraying is much faster but may not penetrate the porous surface of the bricks. Rolling is effective for getting paint into the bricks but doesn't work as well on the mortar. Brushing is very time-consuming and also won't penetrate beyond the surface. For the best results, a combination of spraying and rolling is often recommended. If you use a roller, choose a thick option (at least a half-inch) and ensure the paint gets into all the crevices for even coverage.

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.