Insulayment 100 sq ft Premium 3 mm Flooring Underlayment Garden Hose Fittings This matte black subway tile 1000993234 This matte black subway tile casts a velvety 3 setting handheld shower Square Footage Per Roll (Sq 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