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Brick spalling—which refers to the crumbly, flaky, or pitted appearance that can develop over time—is caused by a few different conditions. These include:

• Climates with constant freeze-thaw cycles

• Use of non-breathable sealants

• High-pressure water cleaning

• Improper installation

While you can’t do anything about the weather, you can preserve your bricks by cleaning them with soapy water and a good old-fashioned scrubbing. Pressure washers may be satisfying to use, but they can eventually wear away the surface of your bricks. If you don’t have advanced-level DIY skills in masonry, you can hire a reputable masonry contractor in your area for your project.

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.

Yes, it is usually possible to repair a damaged brick mailbox. A professional brick mason or masonry contractor can perform the repairs. They can assess the damage, provide an estimate, and help you determine if the repair is worthwhile based on the mailbox's value and the extent of the damage. The repair process may involve sourcing replacement bricks and mortar. Damaged bricks can be cut out and replaced, or the mortar joints can be cut out and retucked. It's important to note that the new mortar may differ in color from the original. If the mailbox insert itself is damaged, it can typically be cut out and replaced as well. If your brick mailbox has been completely destroyed, you should check with your local building code enforcement office before rebuilding, as some areas do not allow brick mailboxes due to the potential hazard they pose to drivers.

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.