Insulayment 100 sq ft Premium 3 mm Flooring Underlayment Memphis Light Oak Flooring ) 7 Returnable 180 Day Cordless ) 7 Returnable 180 Day Cordless Corded Corded Voltage (volts) 120 Tools Product Type Power Tool Minimum Blade Length 59 1 4 in 93700787 in Downrod Length (in absorb sound but flexible enough to form around sub floor surface roughness that may otherwise cause laminate panels to "rock" or lay unevenly Approved for in floor heating systems the patented process used to make Insulayment creates a three dimensional fiber matrix that allows heat to permeate evenly while helping to protect the floor covering material from thermal shock Insulayment adds a thermal "break" to flooring assembly with an r value of approximately 0