Charlie Martin is the underlayment sales manager for the Halex Corporation. Prior to joining Halex, he sold the first truckload of Multiply Plywood underlayment in the United States 22 years ago, helping to make Multiply into a leading brand throughout North America. Ironically, he began his career as the second salesman hired in the United States to sell the original waferboard, the forerunner of OSB.
Deflection is a problem that many installers face, yet few understand it or know how to measure it correctly. Charlie Martin, underlayment sales manager for the Halex Corporation explains what deflection is and how to check it.
