Hollow-core doors leak like drums. Swap for a solid-core slab, add compressible perimeter gaskets, and install an automatic door bottom that seals only when closed. Mind the threshold; a rigid sweep scraping the floor becomes noisy and ineffective. Address the latch strike, keyhole, and mail slot. One well-sealed door can deliver dramatic, immediately audible improvement for bedrooms and offices alike.
Double up drywall with a damping layer between sheets, or hang new layers on sound isolation clips with hat channel to break contact. Seal every seam. Avoid back-to-back boxes; use putty pads and offset outlets. Consider mineral wool for absorption within cavities. Remember flanking ceilings through joists and shared bulkheads. Thoughtful assemblies lift STC ratings and tame stubborn voices and midrange clatter.
Impact noise travels well through structure. A dense underlayment under floating floors, cork in strategic layers, or a mass-loaded vinyl barrier can reduce transmission. For renters, thick rugs with heavy pads soften footsteps and absorb flutter echoes. Mind baseboards and transitions that create gaps. Combine with sealing and furniture placement to quiet downstairs complaints while improving comfort and warmth underfoot.





