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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.

Mortar is a mixture of sand and cement that binds materials, such as bricks, stones, and concrete blocks, together. Think of it as the glue that fills in the gaps between bricks and stones, then seals them in place to prevent damage or deterioration. Mortar also helps spread the load across a wall or structure, keeping cracks and shifting at bay.

Drilling into brick doesn’t have to be a dangerous project if you prep and approach it with the right tools and techniques, but it does come with risks if it’s not done correctly. It can lead to significant issues, such as damaging the brick or affecting the wall’s structural integrity. Applying too much force can crack or chip the brick, while incorrect placement might compromise its load-bearing strength. 

Handbuilt masonry fireplaces are likely what comes to mind when we think about curling up by the fire at the end of the day. But bricks in the firebox and chimney tend to be heavy, which is not ideal for homes with weak or damaged foundations.

Prefabricated fireboxes come with a full flue and chimney system, significantly reducing the price and installation time. However, if you need to replace the panels down the line, you are locked into the same model or something very similar.