Loading... Please wait...
  • Gift Certificates
  • My Account 

CALL US: 888-367-8931        E-MAIL US: CLICK HERE 

BLOG

Soundproofing Project Reasonable Expectations and STC Rating Definitions

Posted by


"SOUNDPROOFING" - Expectations / STC Rating Definitions / Green Glue STC Rated Walls

The dictionary definition of "Soundproofing" is (v) the action of making (a room or building) resistant to the passage of sound.  The key part of that definition which is commonly misunderstood is that soundproofing is making a room resistant to sound, not making the room devoid of all sound transmission.

When performing a soundproofing project, a contractor must explain to their customer what the end results will likely be.  If this is not properly explained, the customer will most likely be disappointed.  The customer will be unhappy with your work even though the results meet or exceed your expectations.

EXPLANATION OF STC RATINGS:

We have written many blogs and essays explaining how STC ratings are determined and also about the pros and cons of the STC rating system altogether.  This post will only explain what the STC Rating means in terms of sound transmission.

STC RATING
REASONABLE EXPECTATION
STC 28-30
Low speech audible, most sentences completely understood
STC 30-35
Many phrases and some sentences understood without straining to hear
STC 42-45
Individual words and occasional phrases clearly heard
STC 47-50
Loud speech audible, music easily heard
STC 52-55
Loud speech audible if straining to listen, music can be heard and may still be disturbing
STC 57-60
Loud speech essentially inaudible, music can be heard faintly but bass may still be disturbing
STC 65+
Most sound cannot be heard


In the table listed above, you can see that the higher the STC Rating, the better the structure is for blocking sound.  A standard wall which consists of a 2x4 wood stud wall with no insulation and just 1/2" drywall on both sides will be in that lowest STC range of around STC 35.  Two people can basically have a full conversation through this wall with little difficulty understanding full sentences.

By using 5/8" drywall (more mass) instead of 1/2", adding sound absorbing insulation, and sealing up all joints with acoustical sealant, we can increase the STC rating up to STC 41.  At this level we will still be able to easily hear phrases and some sentences without having to strain to hear them.

If we were to add just one layer of Green Glue Noiseproofing Compound with an additional layer of 5/8" drywall to ONE side of the wall pictured above, the STC Rating will greatly increase up to STC 52 (addition of 11 points!).  This wall will greatly reduce the amount of talking through the wall and only loud talking will be audible if you strain to listen.  One downside would be that loud music can still be a nuisance.

If you added a layer of Green Glue Noiseproofing Compound between an additional layer of 5/8" drywall to BOTH sides of the wall, the STC Rating increases up to STC 56.  This bump up to the higher STC 56 will make loud speech inaudible and music will be heard faintly although bass sounds from music can still be disruptive.

To increase a wall's STC Rating up to STC 66, the addition of Green Glue Whisper Clips and Hat Channel in  conjunction with a layer of Green Glue Noiseproofing Compound between layers of 5/8" drywall.  At STC 66 most noise cannot be heard through the partition although some very loud bass may still be audible.

The examples listed above are for walls using Green Glue Noiseproofing Compound.  Each wall must be properly sealed with acoustical sealant.  STC Ratings are based on lab tests so actual results may vary but tested STC ratings give you a good comparison between designs and material options.

MOST RECENT BLOG POSTS
-How To Install Pipe Insulation Support Pegs
-Four Steps to Asbestos Pipe Insulation Encapsulation
-Fiberglass Pipe Insulation Accessory Items You May Need
-Owens Corning ASJ Max Pipe Insulation Code Compliance
-Fiberlock Lag Kote II Asbestos Encapsulating Sealant
-No-Frame Fiberglass Edge Coating for Frameless Acoustical Panels
-Fiberglass Pipe Insulation Install Saves Big Dollars


The Four Steps to Asbestos Pipe Insulation Encapsulation

There are four main steps to properly encapsulating asbestos pipe insulation.  This blog post will discuss each of the four steps to help complete the project in a safe manner.  The overall result of a successful encapsulation project is that any potential hazardous materials are concealed and unable to cause harm in the future. STEP 1 [...]

Read More »

Fiberglass Pipe Insulation Accessory Items You May Need

Fiberglass Pipe Insulation Accessory ItemsThis post is to help show off some of the lesser known accessory items that you may be interested in when installing fiberglass pipe insulation.  We find that some customers order pipe insulation and realize during install that they should have ordered some other products as well.ASJ Max TapeEach 3 foot [...]

Read More »

How to Install Pipe Insulation Support Pegs

Pipe Insulation Support Pegs With PVC Discs - Install Guide When installing fiberglass pipe insulation, we will run into piping that is secured to the ceiling or wall with pipe hangers (clevis, etc).  If you simply install the pipe insulation, the location of the pipe hanger will crush or squish and look very unprofessional.  At these [...]

Read More »

Fiberlock Lag-Kote II Asbestos Encapsulating Sealant

FIBERLOCK Lag-Kote II Bridging Encapsulant for Asbestos Insulation New product offering!  We are now proud to stock Fiberlock Lag-Kote II which is a specially formulated bridging encapsulant designed specifically for asbestos fibers.  Lag-Kote II can be used directly onto asbestos insulation or as a secondary barrier over Rewettable Canvas Pipe Lagging. What is Lag-Kote II? Lag-Kote II is [...]

Read More »

Owens Corning ASJ Max Fiberglas Pipe Insulation Code Compliance

Looking to see if Owens Corning ASJ Max Fiberglass Pipe Insulation complies to your engineering specification?  Below is just some of the more common standards that ASJ Max meets or exceeds.  Please contact us if you have a specification that is not listed below: Code Compliance: Owens Corning ASJ Max meets ASTM standards below: ASTM C547, Mineral Fiber [...]

Read More »

NO-FRAME Fiberglass Edge Coating for Frameless Acoustical Panels

NO-FRAME Fiberglass Edge Coating for Frameless Acoustical Panels The market for DIY Acoustic Panel materials is growing and the number of panels that are being manufactured and installed without frames is increasing as well.  Beveled edges and intricate designs are easier to create with the fiberglass core panel rather than the wooden frames themselves.  For example, [...]

Read More »

Fiberglass Pipe Insulation Install Saves Big Dollars

HEAT LOSS COST CALCULATION VS. INSULATING WITH FIBERGLASS PIPE INSULATIONWe've done it before and we are doing it now a third time!  A lot of our customers ask how much money they will save by insulating their home's heating pipes.  We can easily tell our customers that they will in fact save money each winter, [...]

Read More »

Prevent Frozen Pipes with Wrap-On Pipe Heating Cables

If you have ever been unlucky enough to deal with a frozen pipe in your home, you understand the importance of preventing a pipe from freezing this winter.  A pipe that freezes not only stops water flow, it can also lead to a pipe burst.  At first you will not notice a water leak, however [...]

Read More »

VIDEO: How to Install Owens Corning ASJ Max Fiberglass Pipe Insulation

How to Install Fiberglass Pipe InsulationWe have begun taping new instructional videos which will showcase our products along with installation instruction tutorials.  Our first video is a long one which covers a lot of different factors that will help This new video will give you a basic understanding of the following: Shows our Professional Insulator Kit [...]

Read More »


 
bip-large.png

What's New

newsletter

Copyright 2017 Buy Insulation Products. All Rights Reserved.
Sitemap |