What is the main use of slate in construction?

Slate is primarily valued in construction for its durability and weather resistance, making it an excellent choice for roofing material. Its natural splitability allows slate to be fashioned into thin, flat tiles, which can be laid in overlapping layers on rooftops. This not only provides effective waterproofing but also contributes to the aesthetic appeal of buildings, as slate comes in various colors and textures.

Although slate can also be used for wall cladding, flooring, and sidewalk paving, these applications are secondary compared to its primary use in roofing. In roofing, slate's longevity can range from 75 years to over a century with proper maintenance, significantly outpacing other materials, thus making it the preferred choice in regions prone to heavy rainfall or harsh weather conditions. These characteristics underscore why roofing is its main application in construction.