Ted and Mary Louise Clear founded Fin Pan, Inc. It was Ted's patented process line and his successful manufacturing of thin concrete backer board that caught the attention of the Dow Chemical Company. Fin Pan delivered to Dow the first successful IRMA (Insulated Roof Material Assembly) Roofing PMR (Protected Membrane), called XFS4249. The name was later changed to LIGHTGUARD® PMR. For the next 15 years, Fin Pan, Inc., manufactured IRMA Roofing PMR for Dow.