Roofing Materials
What Is the Average Lifespan of a Slate Roof?
The average natural slate roof lasts 75 to 100+ years, and plenty run past 150. But “average” hides the thing that actually decides it: the grade of the stone. Two slate roofs installed the same year, on the same street, can be 100 years apart in life expectancy. Here are the real numbers — by grade, by type, and by
September 15, 2026