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ACOUSTICAL SEALANT CHOICES
AIR BYPASS LEAKS
AIR LEAK SEALING PROCEDURE
AIR TEST FOR MOLD: ACCURACY
ALLERGEN TESTS for buildings
ALLERGENS in BUILDINGS, RECOGNIZING
ANIMAL ALLERGENS / PET DANDER
ANIMAL ENTRY POINTS in buildings
APPLIANCE EFFICIENCY RATINGS
BLOWER DOORS & AIR INFILTRATION
BLOWER FAN CONTINUOUS OPERATION
BLOWER FAN OPERATION & TESTING
BUCKLED FOUNDATIONS due to INSULATION?
BUILDING NOISE DIAGNOSIS & CURE
CARPET PADDING ASBESTOS, MOLD, ODORS
CARPETING, SELECTION & INSTALLATION
CATHEDRAL CEILING VENTILATION
CHIMNEY INSPECTION DIAGNOSIS & REPAIR
COMBUSTION AIR for TIGHT buildings
DIRECTORY of MOLD / ENVIRONMENTAL EXPERTS
ENGINEERED WOOD Flooring
FIREPLACES & HEARTHS
FLOOR TYPES & DEFECTS
FRAMING DETAILS for BETTER INSULATION
FREEZE-PROOF A BUILDING
FROST HEAVES, FOUNDATION, SLAB
HEAT LOSS in BUILDINGS
HOUSE DOCTOR, how-to be
INDOOR AIR QUALITY IMPROVEMENT GUIDE
Insulation Air & Heat Leaks
INSULATION LOCATION - WHERE TO PUT IT
INSULATION R-Values & Properties
KITCHEN VENTILATION DESIGN
LOG HOME GUIDE
MOISTURE CONTROL in BUILDINGS
MOLD: A COMPLETE GUIDE TO MOLD
NOISE / SOUND DIAGNOSIS & CURE
ODORS GASES SMELLS, DIAGNOSIS & CURE
PLASTER, LOOSE FALL HAZARDS
PLASTER TYPE IDENTIFICATION
PLUMBING DRAIN NOISE DIAGNOSIS
PLUMBING NOISE CHECKLIST
ROOF NOISE TRANSMISSION
ROOF VENTILATION SPECIFICATIONS
SLAB CRACK EVALUATION
SOUND CONTROL in buildings
SPLITS & CRACKS in STRUCTURAL WOOD BEAMS
STAIRS, RAILINGS, LANDINGS, RAMPS
SUMP PUMPS GUIDE
THERMAL EXPANSION of HOT WATER
THERMAL EXPANSION of MATERIALS
TRUSS UPLIFT, ROOF
VENTILATION in BUILDINGS
WALL FINISHES INTERIOR
WIND WASHING INSULATION At EAVES
WINDOWS & DOORS
WOOD FLOOR DAMAGE
Building soundproofing materials & options: here we provide a list of soundproofing materials & devices used to control sound transmission in buildings: how to make a quiet home, office, or place of business using sound isolation for ceilings, floors, walls, plumbing, etc.
This article series discusses noise and sound control in buildings, and includes excerpts or adaptations from Best Practices Guide to Residential Construction, by Steven Bliss, courtesy of Wiley & Sons.Readers interested in uses of acoustical sealants in buildings should also see ACOUSTICAL SEALANT CHOICES.
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Like weatherization work, effective soundproofing requires careful detailing and workmanship. Small holes and bypasses can lower field STC values to 15 to 20 points below laboratory values. Leaky edge joints, unsealed doorways, interconnecting ductwork, and unsealed electrical and plumbing penetrations all degrade acoustical performance.
While special non hardening acoustical sealants are often specified in commercial work, any high-quality sealant that remains flexible can be effective in blocking sound transmission. Butyl, silicone, and urethane caulk can all be used.
To prevent sound leaks, use sealant around electrical boxes, plumbing penetrations, and any other penetrations in the wall or ceiling surface.
For walls with STC ratings in excess of 35, apply a flexible sealant at the joint where the drywall meets the floor.
Acoustical sealant is also used to seal around the perimeter of walls or ceilings hung from resilient channel.
Details: Readers who need to know more about the use of acoustical sealants for sound control in buildings or who need to know where to purchase acoustical sealants should see ACOUSTICAL SEALANT CHOICES
Special drywall products such as Quietrock® are sold in as many as eight product variations ranging from economy sound-transmission-resistant drywall to fire-rated and high performance soundproof drywall. According to the product manufacturer"
QuietRock replaces older techniques such as resilient channels, clips, sound board and vinyl and offer lower cost solutions than other methods with higher Sound Transmission Class (STC) performance.
The company, Quiet Solution, a division of Serious Materials, also produces QuietWood® "a multi-layer engineered internally damped panel ideal for use in existing or new construction, ... used in place of standard plywood in most applications" and QuietHome® noise reducing indows, additional sound-transmission resistant products.
Resilient channel such as Auralex RC8 is installed perpendicular to the studs or joists and needs at least 3 inches of free space in the cavity behind it to be effective.
Resilient channel is a specially-formed, metal device that, when used to hang drywall (instead of attaching the drywall directly to the wall studs or ceiling joists), significantly reduces the sound transmission of the wall or ceiling system.
The resilient channel material is secured to the studs and drywall is secured to the channel - providing a break in sound transmission through the wall.
Resilient channel for sound control is not effective if attached to sheet materials, such as drywall. It is also important to use the right length screws, so they do not penetrate into the wood framing.
Just a few screws into the wood can undermine the resilient connection and substantially lower the STC and IIC ratings.
Leave a 1/4 to 1/2-inch gap around the perimeter of a ceiling or wall hung from resilient channel and fill with an acoustical or other non hardening sealant.
Ordinary fiberglass insulation is an effective sound absorber in cavities and increases the STC rating of walls by 3 to 5 decibels. The insulation needs to fill only about three-quarters of the thickness of the cavity to be effective.
Adding more adds little additional sound protection, and stuffing insulation in too densely could actually increase sound transmission.
Cellulose insulation has about the same sound deadening characteristics as fiberglass.
Foam insulation is not particularly effective for sound control. Foam is too light to add mass to the wall and is not resilient enough to absorb sound.
Subfloor and laminate floor underlayment: for sound transmission reduction in floors also see NOISE CONTROL for FLOORS - our photo (above left) illustrates a sound-transmission-reducing flooring underlayment material.
Flexible, heavy rubber gasketing makes an effective seal against sound leaks as well as thermal leaks around doors and windows.
Either bulb- or magnetic-type weather-stripping is effective as long as it makes an airtight seal between the frame and door or window.
-- Adapted with permission from Best Practices Guide to Residential Construction.
Continue reading about methods for sound control in buildings by using the links provided just below.
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