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Masonry uses units like bricks, cement blocks, and stone with mortar between them. Mortar is generally made of sand and a type of cement. Examples of masonry include the brick or stone on a house, chimney, or freestanding wall. Concrete is a mixture of water, sand, stone aggregate, and other materials, and is poured into forms or moldings. Types of concrete applications include driveways, garage and basement floors, and poured concrete walls in basements and crawl spaces.

You will repoint over a fraction of the old mortar, but you should scrape away 1/2 to 1 inch of mortar from the joints before repointing. Otherwise, the repointing is only masking the weakened mortar instead of actually replacing it, which could put your chimney at risk of bigger, more expensive damages later on.

Yes, it’s a good idea to use paint primer on your brick fireplace before painting it. Brick is highly absorbent, so your first few coats of paint will likely seep into the surface of your fireplace, allowing the natural color of the brick to seep through. To avoid this, you’ll want to use one or two coats of primer, followed by the topcoat. 

Drilling into brick or mortar requires the use of a masonry drill bit. Masonry drill bits appear similar to standard drill bits except for the leading tip of the bit. The tip has a bulky carbide arrow-shaped end slightly larger than the rest of the bit shaft. Standard or high-speed drill bits designed for making holes in wood or metal don’t have the ruggedness or design shape you need to drill into brick. They may not go through the brick at all, and if they do, they’re more likely to overheat, crack, or dull before you finish drilling.