William S. Simpson Co., Inc.

Many of the lines we have carried for years overlap into other segments of the building supply industry. We recently came to the conclusion that if we're servicing lumberyards and stove shops as well as the masonry yards, and the materials are readily available to us...why don't we cross over and sell these items along with the usual fare. Hence we are offering some roofing items, chemicals, vents etc. Why should our customers have to look to others for these things when our trucks are delivering to them anyway.

Evergreen Slate is the largest producer and supplier of slate in the United States. Since 1916, the company has taken pride in providing its customers with high-quality products and excellent customer service, as the leader in the slate roofing industry.

The thousands of roofs we’ve provided to fine homes, churches, libraries, government buildings and universities for almost 90 years are a testament to our role as the premier Slate Roofing Tile provider.