The IAPMO Institute of Building Technology (IBT) is now accredited by ANAB to conduct the ASTM C518 thermal transmission properties test, an exciting new addition to the expanding list of accredited tests it can offer to building materials manufacturers.

ASTM C518, "Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus," tests such insulating materials as expanded polystyrene insulation (EPS), extruded polystyrene insulation (XPS), spray-applied polyurethane foam insulation, polyisocyanurate insulation, fiberglass and rockwool batts, and blankets.

The ability of a material to resist the conductive flow of heat is expressed in units of ^oF.ft².h/Btu {m².K/W} but is more commonly known as its R-value. The greater the R-value of the material, the greater the heat resistance or insulating effectiveness of the material and thus the better its insulative capacity.

Using its in-house TA Instruments/LaserComp FOX 314 Heat Flow Meter, IBT issues reports on a tested-material’s thermal conductivity (k-value) and thermal resistance (R-value).

“The construction industry is continuously creating energy efficient materials, and the feedback and independent verification we provide is critical to this process,” said Jay Mishra, vice president of building product testing.

For more information or to receive a quote or consulting on specific requirements, please contact Mishra at (909) 218-8114 or jay.mishra@iapmoibt.org.