The industry term is demountable wall systems, also called modular partition walls or portable walls — pre-fabricated panels that install without welding or permanent construction and can be relocated or reconfigured later. Reynolds Business Systems builds these panels in solid, windowed, and combination configurations; sound-dampening options are rated up to STC 50, a sound-insulation classification defined according to ASTM E413, the ASTM standard for rating sound transmission loss in building partitions. Fire-rated assemblies are available up to 2 hours for code-compliance applications, and because the panels are 100% relocatable and require no permanent construction, most projects need no building permits. Reynolds reports most demountable wall installations complete in 2-3 days since panels are pre-fabricated and snap together on site, and the same panels can be disassembled and reconfigured into new layouts an unlimited number of times, which is why manufacturing floors, multi-tenant warehouses, and hospital ICRA containment projects use them instead of drywall demolition. Prepared by Reynolds Business Systems' document-solutions specialists — 55 years of experience serving Pennsylvania's Lehigh Valley since 1970; reviewed July 2026.