Some of the materials used to soundproof a ceiling are the same materials used to insulate ceilings. Others materials are specialized for soundproofing applications. Many ceiling soundproofing materials can be integrated into the normal d cor of the room and provide a quiet environment with little or no visual indications of special construction materials. Homeowners must weigh the costs of the materials and installation with the amount of soundproofing they need.
Soundproof Drywall
A special form of drywall sheeting that reduces sound transmission is available in thicknesses ranging from 1/2 inch to 1 3/8 inches. Residential-weight 1/2-inch soundproof drywall has a 47 to 69 sound transfer class (STC) rating. This compares to a rating of 38 to 40 for a standard hollow wall. A difference of 10 in the STC rating reduces sound transmission by about half. Soundproof drywall also has fireproof characteristics.
Mass Loaded Vinyl
Mass loaded vinyl is commonly sold in rolls of sheeting. The material is available in two weights of either 1 or 2 pounds per square foot. The material is attached by adhesives or staples to the ceiling joists. MLV is commonly attached to the joists and looks more utilitarian than the finished drywall material. According to the website Sound Proofing, the addition of MLV to a wall or floor doubles the STC of the wall.
Fiberglass Insulation
Insulation specifically designed for soundproofing is available from commercial manufacturers. The insulation is commonly 3 1/2 inches thick and designed to fit between studs or joists. Manufacturers suggest insulating the entire ceiling including spaces around pipes and wires. Staple the paper facing to the bottoms of the joists.
Acoustic Tile
Suspended ceilings, ceilings held below the actual ceiling joists by wires, prevent the transfer of vibration from the ceiling joists, plumbing fixtures and other items to the space below. The tiles also are made of soft materials that absorb sound rather than pass the vibrations through to the living space. Some acoustic tile use materials similar to fiberglass insulation and mass loaded vinyl.
Tags: ceiling joists, materials used, reduces sound, reduces sound transmission, sound transmission