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It’s called cobblestone because it’s made of stones that are “cobbed” together. A cob is a term that refers to rounded lumps. Originally, cobblestone streets were made from pebbles and stones gathered from riverbeds that had been rounded over time by the passage of water. The term has nothing to do with a cobbler, which is the term for someone who makes and fixes shoes.

The cost to install or replace brick or stone siding generally ranges from $10 to $50 per square foot. The final price depends on several factors, including the specific material type, local labor rates, and any necessary preparation work, such as removing old siding. For example, different types of stone have varying costs per square foot: natural stone ($4.50–$35), stone veneer ($11–$13), faux stone ($6–$9), and cultured or manufactured stone ($5–$8).

You should generally drill into the mortar joints when installing shutters on brick. Mortar is softer, which makes drilling easier and puts less strain on your tools. It also lowers the risk of cracking a brick—something that’s a lot harder to fix. Mortar holds fasteners well enough for standard shutters, and if you ever need to patch the holes later, it’s a much simpler job than dealing with damaged brick. Just keep in mind that if your mortar joints are too thin or the hardware calls for brick anchoring, you'll need to check the manufacturer’s recommendations and adjust accordingly.

In some cases, black stains on brick are caused by organic substances like algae and mold. However, it's more likely that the black spots you're noticing on your bricks come from carbon from vehicle exhaust or soot. Black stains can usually be removed by scrubbing the brick with a brush and masonry cleaner or power washing.