Substrate for parquet and laminate made of polystyrene beads. Polymer underlay with waterproofing. Construction and repair of floor coverings Stock Photo - Alamy
S And H Industries ALC 11645 Window Underlay 24" x 12", Polystyrene 11645 | Zoro
Polystyrene Underlay Roll 2mm 16.5m² Expert Thermo Roll Cezar - Mrowka Building Supplies
Schluter Bekotec 2 ft. x 4 ft. x 1.375 in. Studded Screed Panel Underlayment for Tile EN/US/P - The Home Depot