Frequently Asked Questions Does DURA-SON have a moisture barrier? Collapse No. Only the DURA-SON MB has a moisture barrier. Why use a moisture barrier? Expand To prevent possible humidity problems with your wood. Can DURA products be used over radiant heated floors? Expand Yes. Can you nail or staple wood floors over DURA-SON and DURA-SON MB? Expand We do not recommend nailing or stapling through our underlayments due to the sound transmission through the attachment and to the possible flexing of the material, which could eventually lead to a squeaky floor. Will rubber meet fire rating/radiant panel test? Expand Yes, passes class 1 as an assembly. What is the difference between IIC and FIIC? Expand FIIC : Field Impact Insulation Class IIC: Impact Insulation Class They are measurements that determine the absorption of impact noise. The IIC is made in a lab, while the FIIC is made on site. What does NRC mean? Expand Noise Reduction Coefficient It is the noise measured within a room. What does decibel (dB) mean? Expand A decibel is the unit used to measure the intensity or loudness of sound. For example human voice is measured at approximately 65db. A decibel is not an indication of sound insulation. Can DURA products help achieve LEED credits? Expand Yes. Which side goes face down? Expand Black side. Should DURA-SON seams be sealed with a duct tape? Expand Yes. For the DURA-SON MB, we recommend a vapour barrier tape. Which DURA product can you use under ceramic tile? Expand DURAQUIET 3mm Can parquet be used over DURA products? Expand No. How long will DURA undercushions last? Expand The lifetime of the product under which they are installed.