Roofing contractor expert. ROO-2239 is a California licensed roofing contractor. Union trained in California with 28 years of experience in the construction industry. His 28-year background in the construction industry has provided extensive hands on experience and comprehensive knowledge in the application, maintenance and repair of built-up roofing, steep slope roofing. ROO-2239 is also accomplished and provides expert services for water intrusion issues related to waterproof deck coatings, below grade waterproofing and the related sheet metal flashing and exterior membranes associated with the weatherproof envelope of a buildings exterior. ROO-2239 has a thorough understanding of the Uniform Building Codes and their application in the construction industry. The services he provides include contract review, plan checks, estimating and cost analysis. ROO-2239s priorities are to his clients and to the use of cost effective methods when performing site in.