Moisture is generally present in warm air, but insulation's effectiveness is often compromised by dampness. Using a vapor barrier between insulation and the warmer, more moist side of the insulation will help to maintain the insulation's performance. Tu-Tuf #4 is an excellent quality cross-laminated virgin poly sheeting, made from high density resins. It is strong and durable, with a 4-mil thickness. On above ground levels, Tu-Tuf should be run completely around the structure, including walls and ceiling, resulting in zero wind chill infiltration. Below grade, Tu-Tuf should be installed around the outside perimeter from the base to the ground level, and laid under the concrete flooring, eliminating moisture migration. Tu-Tuf #4 is white with a smooth texture, while the XF version is translucent with a slightly ribbed texture.
Vapor Permeance: 0.00741
Water Resistance: 100 dry indicator/hour
Tensile Strength: 8507 psi, 34 lbs. per inch width
Puncture Resistance: 275.8 beach units (6 times more puncture resistant than 3-mil poly)
