Slate shingles are advantageous because they:

Slate shingles are highly regarded for their exceptional durability and long lifespan, which can often exceed 100 years with proper installation and maintenance. This longevity makes them a wise investment for homeowners looking for a roofing material that will stand the test of time. Unlike many other roofing materials, which may need to be replaced multiple times throughout a building's life, slate retains its integrity for decades, reducing the frequency and cost of replacement.

While slate shingles may not be lightweight, may require more maintenance than some might think, and typically come at a higher initial cost than asphalt shingles, their long lifespan significantly contributes to their appeal and value proposition. Homeowners benefit in the long run due to fewer replacements and repairs, making slate a potentially cost-effective choice over the life of the roof, despite the higher upfront investment.