What are the ‘U’ & ‘R’ values

With respect to Silent Roof Material, the ‘U’ and ‘R’ values of the material are insignificant when considering it’s specific use which is to significantly reduce the noise created by rainfall impacting on to a roof surface. The Silent Roof material is not designed to be a thermal insulation product.
U-factor and U-value are interchangeable terms referring to a measure of the heat gain or loss through a material due to the difference between inner and outer air temperatures of the material in question. U-factor or U-value is also referred to as the overall coefficient of heat transfer. A lower U-value indicates better insulating properties. The units are Btu/(hr)(ft2)(°F). The Silent Roof material was not designed to be an insulator therefore the ‘U’ value of the material has not been calculated.