Slate stone roofs is an important application of building slate tiles. Slate roof tile, also being called "slate shingles" in some places, is an ideal roofing solution as minimum life of a slate roof is over hundred years. Some slate roofs in Europe are still in good condition 400 years after initial installation. Although costs of slate installation is moderately high, slate stone roofs are still arguably the least expensive money can buy when the life of roof is taken into consideration. In addition, the slate roof shows beautiful colors and great textures and causes no ecological concerns. Although Vermont slates have been most popular choices in North America, China slates provide attractive alternatives that are comparable in variety and quality but economic in terms of costs. Additional advantages of using slate roof tiles include: fireproof; water repellant; minimal maintenance - moss and fungus will not grow on the slate roof); appealing appearance; and competitive pricing comparing to regular roofing shingles if to buy slate roof shingles originated in China.