MFM Building Products, founded in 1961 by Robert E. Simpson, offers the construction industry more than 57 years of knowledge and expertise in the manufacture of waterproofing and weather barrier products. From humble beginnings, this family-owned manufacturing company has continued to grow and foster new product development, improved product performance, and help reduce overall costs with a value-based philosophy.

TAMLYN® was established in May 1971 by Ron Tamlyn, Sr. with $800 borrowed money and help from his wife, Jean, in a small shack in the back yard of their modest home in Bellaire, Texas. We remain family-owned to this day. Our history is one of quality, innovation, and proven performance. We are proud to represent the manufacturing end of the building products industry, and currently source internally, externally domestically, or externally internationally depending on who offers the best overall quality and logistical value.