Standard Test Methods for Cellulosic Fiber Insulating Board| water absorption, transverse strength, transmission-water vapor, thickness, thermal insulating materials-board, thermal conductivity, tensile strength, standard deviation, reproducibility, repeatability, precision conditions, precision, modulus of rupture, moisture content, linear changes, length and width, interlaboratory study, expansion, density, deflection, cellulose, board, bias, accuracy, accepted reference value, absorption