FloorMuffler Encore Underlayment for Vinyl Plank & Rigid Core Flooring Most underlayments aren't made for today's vinyl floors. FloorMuffler Encore is. This premium 1.1mm XLPP underlayment is purpose-built for luxury vinyl plank and rigid core flooring (SPC and WPC) — including planks that already have a pre-attached pad. Where standard foam is too thick and too soft for vinyl click systems, Encore's low-profile, high-density construction supports the locking mechanism instead of stressing it. Yes — It Works With Pre-Attached Pad Have rigid core flooring with the pad already attached? Encore is one of the few underlayments engineered to go underneath it, adding sound reduction and moisture protection without compromising the locking system or your flooring warranty. That makes it the answer to one of the most common questions in vinyl flooring — "can I add underlayment under attached-pad LVP?" With Encore: yes. Built-In Moisture Barrier The closed-cell XLPP core is itself a moisture barrier — no separate vapor film required. Over concrete slabs and in basements, that's the layer standing between subfloor moisture and your floor. Quieter Vinyl Floors Rigid core floors can sound hollow and clicky underfoot. Encore delivers up to 69 dB IIC, 62 dB STC, and a 22 dB Delta IIC, cutting impact noise and that hollow sound — and helping vinyl installs clear condo and HOA sound requirements. Protects the Click, Smooths the Sub At 1.1mm, Encore stays within the thin, firm profile vinyl manufacturers call for, with outstanding compression strength that keeps tongue-and-groove joints tight under traffic. It smooths minor subfloor imperfections, adds an R-4.0/inch thermal layer, and is compatible with electric and hydronic radiant heat. Where it works best: Luxury vinyl plank (LVP) and luxury vinyl tile (LVT) floating floors SPC and WPC rigid core flooring — with or without attached pad Condos, apartments, and rentals where sound matters Concrete slabs, basements, and plywood subfloors Radiant heat installations Backed by FloorMuffler's limited lifetime residential warranty and 10-year commercial warranty.
