M-D Building Products 80228 3.28 in. x 16 ft. 5 in. PROVA FLEX-HEAT® Underlayment Roll (54 SQ FT)

Made of two layers of polypropylene for mechanical bonding, vapor management and Sheer Stress control to neutralize stress caused by substrate movement Protects tile or stone floors from cracking as substrates move or settle and accepts heating cables (sold separately) up to 5 mm to create comfort via in-floor heat 3.28 in. W x 16 ft. 5 in. L (5 sq m / 54 sq ft.) Red primary layer with white fleece bottom layer Vapor Management System: Open-air channels beneath the fleece layer provides a path for moisture to dissipate. Well suited for below-grade installations 0.26″ (6.5 mm) thick membrane: Can be used without heating cables for matching up to higher floors to achieve a level transition Versatile Heating Cable Compatibility: Can be used with multiple wire sizes of up to 0.2” (5 mm) thick Achieve 3″ (7.6 cm) Cable Spacing: Provides most efficient heat distribution as per wire manufacturer specifications Premium polymer-modified thin set mortar required for installation, no premixed mortar or mastic Install with 1/4 in. x 1/4 in. Square Notch Trowel