Oklahoma Siding and Insulation Company is Tulsa's James Hardie Specialists bringing quality siding remodel and repair services to the Tulsa Metro Area Since 2010 OSI has worked closely with the James Hardie Company to bring quality cement board siding remodel and repair services to Tulsa! As an Associate Contractor of the James Hardie Company, we strive to have the best service through quality installation practices and top rate communication. If you are interested in an exterior renovation or repairs including James Hardie fiber cement siding, then OSI is the one to call! 918-304-7678