Modular-Office.com offers the modular office, when buildings cost is the major consideration. Our portable modular office building is the lowest priced system in the industry. It is constructed with 3" thick panels of 1/8" 4-mill vinyl-clad hardboard, over a polystyrene core. The entire Easy-Three modular office system is completely interchangeable and reusable. All prefabricated components of the Easy-Three System are painted to match, have a Fire Class of C and an average noise reduction of STC25 with an R-11 thermal value. For more information, contact us by e-mail at sales@mcgillandcompany.com or by phone at 1-888-823-7274.