Weathering slates will change color as they age with most weathering occuring in the first 1 to 3 years but can continue to change infinitely. Weathering slate provides the natural earth tones of bronze, browns, buffs, cream colors which eventually become a blend on the roof. Colors tend to be on the lighter end of the spectrum with light grays, greens which can provide a more natural "country cottage" or "old world" look to a home.
Almost all domestic slate weathers to some degree.
Non-Weathering slates as their namesake states hold their colors and tend to be the darker colors of blacks and grays. Non-Weathering slates are most visible on the more formal structures in Georgian and Gothic styles of architecture.
Existing slate roofs on residences are probably about 50% Weathering vs. 50% Non-Weathering, commercial (churches, courthouses, universities, ect...) are about 20% Weathering vs. 80% Non-Weathering. This percentage changes on the region. For instance: Weathering is more common on homes in the North East, while Non-Weathering t is more common in the South East. |
