Flashing: Copper vs. Aluminum

When it comes to flashing repairs for slate roofs, homeowners and contractors have a choice between using aluminum or copper. Both materials are known for their durability and corrosion resistance, but they have some notable differences in their ability to be soldered, their ability to fold without tearing, and their longevity. Here is a comparison of aluminum and copper in these categories:

Ability to be soldered: Copper is much easier to solder than aluminum, due to its higher melting point and the fact that it does not oxidize as easily as aluminum. Copper is also more forgiving when it comes to soldering mistakes, as it is less likely to melt or deform when heated. In contrast, aluminum requires a special flux and is more prone to melting or deforming when it is soldered.

Ability to fold without tearing: Copper is generally more flexible than aluminum, which makes it easier to fold without tearing. Copper can be bent and shaped without breaking, which makes it a good choice for flashing repairs that require a lot of bending or shaping. Aluminum, on the other hand, is more brittle and prone to tearing when it is folded or bent.

Longevity: Copper is known for its longevity and can last for decades or even centuries when properly maintained. Copper's durability makes it a worthwhile investment for homeowners and contractors who want a long-lasting solution for their flashing repairs. Aluminum, while still durable, does not have the same lifespan as copper and may need to be replaced more frequently.

When it comes to flashing repairs for slate roofs, both aluminum and copper have their strengths and weaknesses. Copper may be more expensive upfront, but its ability to be soldered, its flexibility, and its longevity make it a worthwhile investment in the long run. Aluminum is a more budget-friendly option, but it may not last as long as copper and can be more difficult to work with when it comes to soldering and bending. Ultimately, the choice between aluminum and copper will depend on the specific needs and budget of the project.