Pergo GOLD 100 sq ft Premium 3 mm Flooring Underlayment Manual Fastening Tools intended for indoor applications 1000088971 intended for indoor applications A: It features a solid wood face frame with furniture board box and drawer construction Superior moisture protection and sound insulation with more than 10x’s the moisture vapor transmission protection of basic underlayment Underlayment is required for all laminate and engineered wood floating floors Enhances the performance of Lowe’s laminate floors with attached pad Sounds more like solid hardwood not hollow like other underlayment systems Smooths slight subfloor imperfections Easy to install fan fold easy to cut grid pattern