Sound insulation products are a critical part of a quality home. Caulk the top and bottom plates of walls to reduce noise leaks above and under walls and caulk outlets and switches to keep noise from leaking through walls. Use a pre-formed fibre glass duct system or duct liners to reduce noise in metal ducts. Add soft weather gaskets to tops and sides of doors and a threshold closure under the door. Double-paned windows with airtight seals and spacing between panes further reduce noise.
Carpets also reduce footstep impact noise.