Chemelex NuHeat Peel & Stick Uncoupling Membrane 10.6 Sq Ft Sheet (39 in x 39 in) FG0800_1 Non-Woven Polypropylene Heating Pad, Waterproof Anti-Fracture Floor Underlayment for Heating Systems

Chemelex NUHEAT FG0800_1 Peel & Stick membrane sheet does not have a layer of fabric bonded to the bottom like our standard membrane; instead, a pressure sensitive adhesive is applied directly to the underside of the polypropylene structure and the adhesive is protected by a release liner. The other unique feature of NUHEAT Peel & Stick membrane is the mortar vents cut into the top of each pillar. These vents ensure a permanent bond by allowing mortar applied above the membrane to adhere to both the substrate and the floor covering materials. The first step in installing any membrane is to dry fit it across the entire area to confirm you have enough material and to cut sections as needed for proper fitting. Once the pre-fitting is complete, the substrate must be cleaned and then prepped with any standard acrylic floor primer, readily available at most home improvement retailers and flooring distributors. Once the primer has begun to dry and feels slightly tacky to the touch, the release liner can be removed and Peel & Stick membrane can be applied to the treated surface. The bond created between the adhesive and the treated substrate is very strong; however, to ensure a long-lasting, high-performance floor assembly that lives up to the nVent NUHEAT 25-year product warranty, the final permanent bond relies on the mortar applied on top of the membrane. Mortar flows through the vents, bonding to the substrate below. By applying either modified or unmodified thinset mortar to embed the heating cable and secure the floor covering, air gaps within the membrane pillars are sufficient to ensure the assembly still achieves the same High Performance rating on the ANSI A118.12 System Crack Resistance test that the standard nVent NUHEAT membrane achieves. Its polypropylene layer forms channels to embed NuHeat cable securely and functions as a vapor management solution, allowing moisture to escape. Compatible with subfloors like plywood, OSB, concrete, gypsum and cement board.