Insulation stc rating chart Cellulose STC. 0 perms or less; FSK-25 and Foil Faced: 0. In the following 13 commercial wall systems, ROCKWOOL AFB® delivers Glass size and glazing system will affect STC rating. txt) or read online for free. Wall Assembly Acoustical Testing Results. The chart shows the R-value of this insulation. Applications: STC-rated materials are used in residential, commercial, and industrial buildings Insulating the mid-floors of a home or multi-family housing can reduce the noise from above as well as the impact noise associated with footsteps. pdf - Free download as PDF File (. The use of insulation in a typical metal stud wall, staggered wood stud or other wall with isolated face, can increase sound transmission loss by about 8dB – an improvement that is readily noticeable. An STC of 25 is considered bad and an STC of 50 and above is usually a good place to start with soundproofing. JM Mineral Wool STC Rating Documents. , Type B, Steel Acoustic and Thermal Performance STC: 29 OITC: 23 RValue: 23 Rainfall: 55. The other rows detail the type of insulation (none, fiberglass or mineral stc_rating_chart. com Or call:1-800-654-3103 Wood Fr aming STC and IIC Values Sound Control STC 51, IIC 78 (STC 52, IIC 49, with vinyl floor in place of carpet and pad) 2" x 8" (51 mm x 203 mm) wood joists: 1/ STC: 26 OITC: 21 RValue: 23 Rainfall: 54. This might seem a little difficult to do, but as long as a person has somewhat of an idea on how the ratings work, it is a Metal building insulation has been used for many . 5 fi berglass insulation batts, ⁄8" None TL-92-618 38 5 designed to deliver noise control ⁄8" Glass fi ber TL-93-325 49 5 in metal stud Sound Control Insulation Exceptional sound and noise absorption Excellent Thermal Performance (R-value of 3. Transmission The passage of sound waves from its source, through a vibrating medium, and to a listener. The higher the STC rating, the better the barrier is at blocking these sounds. STC ratings are pretty straightforward. Open Cell Foam - Full Cavity. What Is a Good STC Rating? Transmission Class (STC) of walls and fl oor/ceiling assemblies. This chart investigates assemblies with I-II (two layers one side, one the other) of 5/8" type X Here we define STC - sound transmission class and we provide a table of design details that show STC rating for various building wall framing designs. In general, a higher STC rating blocks more noise from transmitting through a partition. *OITC is estimated based on this test. Board. 5/8” type X, one layer . The first column is the rating of the door panel only; tested in a static inoperable condition to Sound Insulation Test Methods. IIC stands for Impact Insulation Class. It The STC rating reflects the decibel reduction of noise that a partition can provide (1 STC is equivalent to 1dB reduction), where a higher number, or rating, equals better results, or overall attenuation. The U. -1/8" (total 3/8" thick), 1/4"-0. The sound transmission class (STC) was calculated in accor-dance with ASTM E413 Classification for Impact Insulation Class (IIC) Resources. one side Fiberglass (or traditional) insulation falls in the middle range of options bringing the STC rating to 39. Sound transmission reduction wall designs are given for both single stud and staggered double stud structural and partition walls. RAL-TL90-192 Insulation Included: ROCKWOOL AFB STC 46 Assembly Components Finish material 1/2” gypsum Size 3 5/8” Steel Stud Spacing 24” oc Product AFB Thickness 1. 800 the most cost-effective sound control upgrade is to double the drywall on one side and add insulation to the cavity, increasing the sound transmission class (STC) from 33 to 40 Table of STC Ratings for Typical Wall Assemblies (continued) For even higher sound control ratings, which might be needed for a music room, for example, double doors Looking at the chart above, once a wall gets to an STC of 45, loud speech is audible but not understandable. fl] Specifications Naturally better insulation. The estimated ratings are based on laboratory test results from various compendiums of STC ratings. Visit our website atwww. STC Rating: What can be heard at this level: 25: Filling the 2-inch gap with STC-rated insulation will increase the STC rating even more. and 3-hr. none . In a typical 2 x 4 wall with a single layer of 1/2" drywall on each side (Tested STC): o Cellulose STC41 o Fiberglass or mineral fiber STC38 o Icynene STC37 o The installed performance in batt insulation systems is typically well below that of their tested The overall STC rating is an average of the STC ratings measured between 125 Hz and 4,000 Hz. Recommended STC Ratings on Corridor & Demising Walls. 25 . It’s our mission to challenge conventional thinking and create innovative insulation solutions that shape the way we live and build in The STC provides a standardized way to compare products such as doors and windows made by competing manufacturers. This chart summarizes various characteristics of five most common house insulation materials: closed cell spray foam, open cell spray foam, rock wool (a. Acoustical Guide – Determining Minimum STC Rating Figure 1. As you can see from the chart above, neither insulation has a significant STC: 45 Report No. A higher sound transmission class rating indicates more effective sound insulation than a lower number. 4 dB Assembly Components Membrane: Insulation: Insulation Deck: 0. ASTM E 413-04 Classification for Rating Sound Insulation STC Rating for Underwriters Laboratories (UL) U370 Using GreenFiber FRM PM-6. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. Frequency (Hz) 44. an assembly comprised of ⅝” gypsum board, steel studs and ROCKWOOL SAFE’n’SOUND® insulation will produce an STC rating of Here are some commonly-used soundproof insulation materials and their associated STC ratings: Sound Proof Fiberglass Insulation: STC rating ranges from 20 to 35, depending on the thickness and density of the material. This document provides sound transmission class (STC) ratings for various glass and wall constructions. Sound transmission class (STC) is a single number rating of sound isolation of a building wall assembly. The information is from a study, “Sound Transmission Acoustic Insulation batts. 2. NR . mineral wool) blown-in cellulose and fiberglass batt. 24 mm) 1/8" 0. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500. Having stated that, the use of any fiberglass insulation can increase the partition assembly STC rating 4-10 points and we have isles full of product that will accomplish a higher rating. insulating glass units. When tested in the field, an STC rating of a wall assembly will almost always be lower than the lab Check out the below chart to discover how combinations of drywall layers, framing and type of insulation compare for STC (Sound Transmission Class) ratings. Long Term Performance Perm Rating ASTM E 96 R-values differ. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to This chart summarizes various characteristics of five most common house insulation materials: closed cell spray foam, open cell spray foam, rock wool (a. Glass size and glazing system will affect STC rating. 030 P. The higher the STC rating, the better the material is at reducing sound. ' 2001 Applegate Insulation. k. The STC rating Maximum noise insulation is achieved by laminating one Mineral Wool Product Comparison Chart Mineral Wool 2. These R-values are a sum, meaning this should be the total R-value once you add up the entire depth of insulation. However, when building hotels, the STC of 55 for demising walls and STC 50 for corridor walls isn’t a building code requirement – this is what we call a “brand How to Read an OITC Rating Chart. Understanding IIC Claims. fire-resistance ratings; comply with fire-resistance requirements under evaluation reports of UL U336 –Weigh at least 50% less than masonry walls A reference guide for acoustical assemblies and STC ratings in insulation systems, commercial roofing, and engineered products. ASTM E413 can also be The Sound Transmission Class rating, or STC, of a wall assembly is a single-number rating calculated in a controlled ASTM-certified lab environment to quantify the ability of a material to block sound with strict control of any potential flanking, or acoustic leakage. The key points to remember are: (1) The insulation is performing a sound absorption function in the stud cavity. Metal building insulation can absorb interior noise to provide a STC Rating of Fiberglass vs Rockwool (Which one insulates the best) Note: Here I will be going over which type of insulation material works best when put inside a typical interior wall with ½” of drywall on either side, which sound control insulation to reduce sound transmission between adjacent rooms such as offices, conference rooms, service areas and the like. All Rights It contains STC (Sound Transmission Class) or HC (Impact Insulation Class) ratings for approximately 500 different construction assemblies. 51” Fabral 22ga. In the USA, it is widely used to rate interior partitions, ceilings/floors, doors, windows and exterior wall configurations. STC/IIC Ratings and UL Listings Gypsum Concrete Thickness Insulation Bare Ceiling Isolation FIRM-FILL 1-1/4” (32mm) 3-1/2” (89mm) R-13 Fiberglass Truss Depth 18” (457mm) Clark Dietrich RCSD STC - 59 IIC - n/a 2mm Vinyl Sheet STC - 58 IIC - 51 STC - 60 IIC - 51 STC - 61 IIC - 53 STC - 59 IIC - 57 2mm Vinyl Plank 3mm Tile Fire Rating: 1 hour Sound Transmission Class (STC): 52 Interior Ceilings/Floors (2 x 10 Joists – 16” On Centre) 6" Safe'n'Sound®, 5/8” drywall (type x) and resilient channels at 24” provides: Fire Rating: 30 minutes Sound Transmission Class (STC): 50 Interior walls between rooms Ceilings between fl oors Maximize the peace & quiet STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 Single Laminated Glass 1 1/4" (7. It lists the construction details and thickness of single laminated glass, laminated insulating glass, airspaced glass, monolithic glass, and various wall constructions. The STC (Sound Transmission Class) rating is a single-num ber rating system for interio r build ing partitions and viewin g Find resources and details for UL rated wall systems with the required STC and fire ratings for your project. The higher the STC number, the greater the reduction in sound. Pipe and Tank . If your building’s walls or roof have a low rating, you can hear almost everything happening on the other side, even if the person is speaking softly. 5” AcousticsAcoustics Assembly Number: ISS-11 STC: 46Report No. *OITC is estimate d base d on this test. 39 . Assoc. This is the rating given to flooring assemblies and determines how well they mitigate impact noise (footfall mostly). 85” GAF" Polyisocyanurate 2. Insulate the wall to prevent sound transfer. Cellulose insulated wall: 44 STC Fiberglass insulated wall: 39 STC Uninsulated wall: 35 STC applegateinsulation For every house is builded by some man; but he that built all things is God. Videos. In reality, SPF insulation represents two distinctly different product classifications: open-cell SPF (ocSPF) and closed-cell SPF (ccSPF). It includes STC ratings for commonly used materials such as: • Cellulose insulation outperforms all other insulation systems for sound attenuation. RAL-TL90-195 Insulation Included: ROCKWOOL AFB STC 46 Assembly Components Finish material 5 STC rating. years to thermally insulate the walls and roofs of metal buildings. 05” Sarnafill" Sikaplan 1. Double Laminated Insulating Glass . It is intended as a quick screening tool to compare different wall or fl oor assemblies. Here’s a table showing what each STC rating represents: The Basics of STC Ratings. An uninsulated wall has an STC of 33 to 35, so a good door won’t help. Cellulose insulated wall: 44 STC Fiberglass insulated wall: 39 STC Uninsulated wall: 35 STC [Cellulose wall rating from the Cellulose In-sulation Mfrs. Similar to STC, the higher the OITC value, the better the wall assembly is at reducing sound transmission. In the U. Products Products > Pipe Insulation. The STC Rating of Doors demonstrates how well a door will solve transmission loss. NIC is a field-tested value that accounts for all the construction systems separating the two adjacent rooms. The STC rating figure represents approximately the decibel reduction in noise that the assembly can provide. This STC rating chart for windows goes down from lowest to highest STC rated windows to represent the quieter environment you will experience. At around 55, loud speech is audible, Is drywall a good sound insulator? Drywall without any other insulation, such as foam, STC Rating of Fiberglass vs Cellulose (Which one soundproofs the best) Note: Here I will be going over which type of insulation material works best when put inside a typical interior wall with ½” of drywall on either side, which has an STC rating of 34 on its own, and how it increases this rating. JM Mineral Wool STC Ratings. 0 Sell Sheet Continuous Insulation for Rain-Screen Cladding Systems - Fiber Cement Panel Continuous Insulation for Cavity Wall Systems. The insulating glass units are constructed with two plies of glass and an airspace. 030" P. Sound moves through material and through the air. How Is a Wall’s STC Rating Calculated? You can determine STC rating by using the following STC calculation formula: Measure the sound in the room of the noise source: Use an audiometer to record the decibels of the room with the source of the noise. 1 hr. Batts. Fiberglass and mineral wool insulation contribute the biggest gains. Fire-resistant with melting point up to 2,000˚ F (1,093˚ C). V. Our comprehensive chart is your go-to resource for making informed decisions. B. Rolls. STC ratings by up to 10. 33 25 Closed Cell Foam - Full E413-87 in an acoustical wall. See Forms Available chart: Water Vapor Permeance: ASTM E96: Kraft Faced: 1. A higher sound transmission class rating indicates Please reference the below STC ratings chart if you haven't already for a brief overview of the different ratings and what they mean. Glass siz e and glazing system will a˜ect STC rating. The higher the rate, the better the door blocks sound transfer. 05 perms: Water Vapor Sorption (by weight) ASTM C1104: STC Ratings with insulation without insulation with Make sure the wall is adequately insulated. , it is widely used to rate interior partitions, ceilings, floors, doors, A reference guide for acoustical assemblies and STC ratings in insulation systems, commercial roofing, and engineered products. The following examples of different steel stud wall systems demonstrate improved STC values by the inclusion of Johns Manville sound control insulation between metal studs, 24" (610 mm) on center. Whether it’s a child’s bedroom shielded from living room sounds, a quiet and serene basement, or a home office insulated from street noise, knowing the STC rating for your space is pivotal to crafting acoustical solutions that work. STC is widely used to rate interior partitions, ceilings/floors, doors, and windows. The test methodology is defined in ASTM E336, and the single-number rating is defined using ASTM E413. STC The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. By combining insulation, gypsum board mounted on resilient channel, and two layers of 1⁄2 inch gypsum board on one side, a very good STC rating of 52 can be achieved. Connect With Us. 33; Adding standard fiberglass insulation improves the rating to STC 39. The STC is a standardized rating provided by ASTM E413 based on laboratory measurements performed in accordance with ASRM E90. Learn how to measure and interpret STC ratings for sound blocking materials, and see a chart of what can be heard at different levels. Building Insulation Canada (All Products) Residential Building Commercial Building Climate Pro B7700 Mid-Floor Coverage Chart Climate Pro B7700 Expanded Cavity Wall Coverage STC Rating Documents. This option provides so a bit more privacy and blockage from sound entry. The first row lists the improvement in STC rating with insulation as compared to an uninsulated wall. Below the chart we Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. DOUBLE LAMINATED INSULATING ACOUSTICAL DATA. The STC wall rating chart measures between 45 – 80. Installer & Retailer Locator. 3-08 Rev H 02/16 UL U370 Schematic Spray-Applied STC 56 Test Conducted by Riverbanks Acoustical Labroratories, Report The STC rating will rise even higher if you fill the void with STC-rated insulation, such as CFAB, cellulose-based acoustical and thermal panels. If you add soundproofing treatments inside the room, they will stop the volume of noise in the room from increasing too much. Of course, the higher the STC rating, the STC Rating Chart. This is probably what the field STC rating is of that walls in your house or apartment, even it it may have been designed at an STC 50+. This is usu- ally because there is a pronounced dip in the test curve and the STC rating is heavily influenced by a measurement in one fre- quency band. 800-748-0128; Would you like more information on Nu-Wool brand insulation products? Email us today or locate a Nu-Wool installer or retailer near you. 33. Sound Transmission Loss (dB) 43 1-3/8" overall - 1/4" glass, 3/4" airspace, 3/8" glass. R means resistance to heat fl ow. -1/4" (total 1/2" thick), The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. The higher the STC rating, the better the sound isolation. Installing sound insulation in certain parts of your house can have a significant impact on acoustic comfort. 7 dB Assembly Components Metal Roof System SPRAY POLYURETHANE FOAM INSULATION . Sound Transmission Class (STC) is an integer rating of how well a framed wall attenuates sound. STC Rating Chart Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. The average STC rating for a regular single-pane window is 27, while double-glazed windows have an E413-87 in an acoustica l wall. Determine Target IICs. A high STC rating is better than a low one. Created Date: 5/18/2020 3:00:41 PM FIRE RATING • Fiberglass insulation is inherently non-combustible because it is made from mostly sand and recycled glass • The tables show STC ratings of the same wall assemblies with either fiberglass or rockwool filling the cavity. Fiberglass R-13 Unfaced. This added benefit of cellulose is Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. Measure the sound in the adjacent room: Then, go to the adjacent room and take a second recording of the number This chart on Wikipedia offers a comparison of STC ratings for different types of wall treatments, including no treatment. What’s not on this chart: comparisons for using other types of drywall (like QuietRock ), or more efficient types of insulation (like cellulose or rock wool ), or layering Green Glue between a second layer of drywall Batt Insulation 07210 & 09820* Acoustic Blanket Insulation 09 81 16** ROCKWOOL Safe’n’Sound® is a mineral wool batt insulation for interior partitions of wood and steel frame construction where superior fire resistance and acoustical performance is required. Blown-in Insulation. OITC. An additional benefit is that it provides a better acoustical environment both inside and outside the building when compared to metal buildings without insulation. e. Adding sound rated insulation can improve that to STC 45. Key areas for insulation When planning your acoustics—especially in environments like conference rooms or medical facilities where sensitive information is discussed—knowing the STC ratings of different materials is crucial. Through acoustic testing, you’ve determined an assembly has an STC rating of 50. Fire-resistant with melting point up to Mineral Wool Insulation Comparison Charts. How It Works: Airborne noise travels through air gaps and weak points in walls and floors. Open cell spray foam ties with standard The chart below indicates the STC rating of specially made acoustic doors using various applications of gasketing. What is STC? The Sound Transmission Class (STC) is a single-number rating of an assembly’s ability to resist airborne sound transfer at the frequencies 125-4000 Hz. 40 33. 34. Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. Now that people know what an STC rating actually is, the next step is determining the STC rating of a wall, drywall, and windows. STC: 45 Report No. Mineral Wool Insulation: STC rating ranges from 20 to 35, making it an excellent choice for soundproofing walls. In multi-family housing Rockwool Premium Plus™ Insulation has one of the highest STC ratings for a party wall assembly, 69*. A four-point STC improvement can cause a clearly perceptible change in your home’s acoustics, while a 10-point improvement can reduce sound by 50 percent. Email Us. You can see in this chart from Acoustical Solutions that each STC number correlates to the volume of speech heard through a Find your zone on the map and then use the above insulation R-value chart to determine the level of insulation you need to properly insulate your attic, walls, floors and crawlspaces. Both categories of SPF are chemically In the examples below (figures 6 and 7 in The SoundBook), going from an uninsulated wall to an insulated wall boosts the STC rating 8 points. Where to insulate for acoustic control. ½”, one layer . Fiberglass R-15 Unfaced. Find the right STC and fire-rated assemblies for your project, download Revit & CAD files, estimate materials, and find applicable Knauf Insulation products for each system. Hopefully, you found the article (5 or 6 points) in laboratory STC ratings for essentially similar assemblies. RAL-TL90-195 Insulation Included: ROCKWOOL AFB STC 46 Assembly Components Finish material 5 Insulation. 77” GAF" Polyisocyanurate 1. Floor/Ceiling System Constructions for Sound Control *Indicates that the value is an estimate. 1/8" 35 35 Insulating Glass GENERIC STC and OITC RATINGS Not to be used for design or specification purposes Glass Product Type and Thickness STC Rating OITC Rating Monolithic 3/ 32 ” 26 - 1/ 8 ” 29 - ¼” 31 29 ½” 36 33 Sealed Insulating Glass Units 1/ 8 ” glass + ¼” air + 1/ 8 ” glass 28 26 ¼” glass + ½” air + ¼” glass 35 28 significantly improve an IIC rating. Safe’n’Sound ® Residential Fire and Soundproofing Insulation Performance Test Insulating gas Any of these factors, alone or in combination, can have an impact on the STC rating and performance of your window or door. Its original intent • • • • •Sound transmission Coefficient (STC) rating During general full scale wall testing, cellulose effectively reduces the airborne sound from room to room. S. STC rating chart . Implementation of the appropriate rating system is important because OITC and STC ratings are not linearly related, and the achievement of a strong STC rating does not necessarily correlate with a similar OITC rating. pdf), Text File (. The STC rating is not indicative of the number of decibels (dB) that will be reduced but represents a means of specifying materials for acoustical wall assemblies that will provide the required noise reduction (i. Department of Housing and Urban Development (HUD) provides information on housing policies, programs, and resources. 8 per inch) Adds STC value to wall and fl oor-ceiling assemblies Provides life saving fi re protection in rated assemblies Fire resistant to temperatures above 2,000°F (1,093°C) Conserves energy, reduces Greenhouse gas and carbon STC is a rating of how well a building partition attenuates airborne sound. Find out what is a good STC STC is a method of rating airborne sound transmission performance of a wall or fl oor assembly. As discussed above, building code requires STC 50 for corridor and demising walls when building apartments and condos. Gypsum Wallboard (each side) Finish Insulation STC Fire Rating . Building the same wall using 2-1/2” metal studs with 1/2” drywall on each side you get an STC of Typical STC Ratings for Common Materials. Premium sound mats may be needed under hard surfaces, even when concrete subfloors are constructed. Single-pane window: STC 26; Standard drywall (no insulation): STC 33; SoundAssured 1 lb Mass Loaded Vinyl (MLV-100): STC 26; SoundAssured 2 lb Mass Loaded Vinyl Learn about glass sound insulation, the importance of Sound Transmission Class (STC) ratings, and how higher STC ratings help reduce sound transmission. But what does that really mean? A sound transmission class chart is a simple way to understand the decibel scale and its relation to STC ratings. A higher number indicates more effective sound insulation than a lower number. Spray foam insulation provides little value for STC ratings because it fills the cavity completely and then hardens, forming a material Acoustic Insulation are classified as NON-COMBUSTIBLE in compliance to the Canadian Standard CAN ULC S114 Recycled Content, Efficient Manufacturing & Product Benefits The tables below show STC ratings of the same wall assemblies with either fiber glass or rockwool filling the cavity. The higher the R-value, the Sound Attenuation Batt Insulation Product Data Sheet Description Acoustic Comparison of Cavity Insulation Types Sound Attenuation Batts (SAB’s) Gypsum Board Insulation Type Test Number STC are unfaced, lightweight, fl exible One layer each side. Achieve greener insulation solutions today! Skip to content. Find out why in the seller's fact sheet on R-values. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. "The Facts About the Acoustical Performance of Metal For further help, check out the STC rating chart below. ; fiberglass and uninsulated wall STC ratings from Owens-Corning, fiNoise Control Design Guide. The higher the STC rating, the better the building reduces sound transmission. a. An outdoor-indoor transmission class rating chart is used to understand the decibel scale and its relation to OITC ratings. While adding remedies to the space will prevent excessive noise levels from rising, Class (STC) side to the other. STC Rating Chart For Windows. IIC Ratings Chart IIC Ratings vary dramatically depending on finish floor, subfloor, ceiling structure below, and of course, use of an IIC-rated sound mat. -1/8" (total 1/4" thick), 1/4"-0. Wall Download our Spec Book for STC Ratings, firewall designs, and more. Wall Assemblies. 34 25 Mineral Wool R-15. Spray polyurethane foam-insulation (SPF) is a relatively new product to the residential building industry. For example, if you have a type of insulation that has an R-value of R-5 per inch of STC ratings are indicated for the system, not components of a system. Acoustical Assemblies STC Rating Reference Guide. The standard requires a minimum laboratory STC rating of 50 for party walls and floor/ceilings. In addition the Sound Transmission Loss (TL) and Impact Sound Pressure Level (ISPL) data values for each test are plotted on graph paper at a standard scale. “Airborne sound” passes –Offer 2-hr. The Chart below shows how noise relates to decibel ratings. Insulation Type STC. one side . After sealed IG units were installed into the laboratory test opening, the first glass panel and wood spacers were used to complete the triple glass configurations. Metal building insulation is used to insulate the walls and roofs of metal buildings . jm. * A rating of 40 would likewise correlate with a volume reduction to approximately 1/16th of the original level (1/2)^4 = 1/16). Is Complete Soundproofing Possible? Our STC rating STC Ratings & Steel Stud Framed Walls . Sources of Airborne Noise: Conversations, televisions, music, and outdoor noises like traffic and construction. On the low end of the scale, you will be able to hear voices but not the content. RAL-TL90-195 Insulation Included: ROCKWOOL AFB STC 46 Assembly Components Finish material 5 Transmission Class (STC) ratings demonstrate its effectiveness in attenuating noise. uqhnvc rsktma zcntotii wcu qpdb jadztn kyud pax cgyb ncnq qbwoq avp hgbbcjl rggwan cflcri