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A well-made brick wall can last up to 100 years if maintained properly, which includes regularly repairing the mortar every 30 to 50 years. If your brick wall is under 30 years old and is already showing signs of repair, it may be due to poor brickwork and installation. Extreme weather conditions can also accelerate a brick wall’s life span (especially the exterior of a house).

Most of the time, you don’t need to seal brickwork and can save that money for another area of home improvement. But if your brick is cracking or you live in an area with a lot of excess moisture (either in terms of rain or freezes), sealing can extend the lifetime of your home. But, make sure you use a breathable sealant, like siloxane, to allow the moisture to evaporate on its own.

The material you use depends on how hard-wearing your steps need to be and what you want them to look like. The most common stone for exterior steps is bluestone. It’s hard-wearing and durable, and bluestone steps cost between $15 and $30 per linear foot. Limestone is also a popular option and is mid-range, costing $25 to $50 per linear foot. You should always consider the specific requirements of your project before ordering any materials.

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.