Stc rating drywall. STC Ratings & Steel Stud Framed Walls .

Stc rating drywall For example, a wall made of brick or concrete will generally have a higher STC rating than one made of drywall or wood. Ratings must be determined in accordance with CAN/ULC-S101-14, “Fire Endurance Regarding Fire-Rated Assemblies. Feb 16, 2024 · To achieve an STC-70 rating the new wall may be a total of 12″ wide, depending upon the final configuration needed. 12 of the LABC. 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. Sound Transmission Class (STC) is a measure for rating the performance of a wall system as a barrier to airborne sound transmission between adjacent closed spaces such as offices. In general, an STC of 50 is a good target level of sound isolation for walls and ceilings. Common Wall Types and Associated STC Ratings Below is a list of common wall types and their estimated STC ratings that could be used as a guideline for design. Another way to measure the wall’s STC is to not transmit airborne sound. back to top The U. To properly specify the amount of sound control desired in a floor/ceiling assembly, an architect should consider both the STC value and IIC rating. Below please find STC rated wall assemblies based on our acoustic lab tests and INSUL models. Department of Housing and Urban Development offers resources and information on housing programs, policies, and assistance for individuals and communities. The Sound Transmission Class (STC) is a single-number rating of the effectiveness of a material or construction assembly to attenuate the transmission of airborne sound. The STC provides an indication of how loud transmitted sound is perceived to be by the listener. Since the drywall is rigidly connected via drywall screws and direct contact, the sound travel directly through the gypsum board itself. Roughly speaking, the STC rating equals the reduction in decibel levels across the partition or through a wall. Aug 9, 2017 · A ULC Listing showing that the sound-insulating assemblies specified in the Sound transmission class (STC) rating table meet the Code’s fire-rating requirements is required in buildings where the NBC 2015 requires a fire-resistance rating for wall assemblies. Sound Transmission Class (STC) measures how well a material or barrier (wall, ceiling, etc. Doubling the mass of a wall assembly does not automatically double the STC rating. • An empty framed wall (steel studs and a layer of gypsum wallboard on each side) has an STC of approximately 35 Sep 10, 2023 · STC Ratings for Drywall. STC is used to evaluate interior walls, ceilings, floors, doors, windows and exterior wall configurations where sound transmission is important. 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 (MLV-200): STC 33 Architects and contractors design and build assemblies that reduce sound transmission between spaces in commercial and multifamily buildings. Fire Rating: 1 hours: System STC: 49 System Thickness: 4. For example, a thick concrete wall will block more sound than a thin gypsum/2x4 wall. Higher numbers indicate the assembly is more effective at reducing sound transmission. Drywall between double studs can dramatically reduce the STC rating of an assembly. You will be adding this product to another product, like a window or wall, which have their own STC rating. 4. Mar 29, 2018 · According to The Soundproofing Company, these are the comparative STC ratings for three different drywall combinations. An assembly can increase its STC rating by doubling up on gypsum board layers on each side, installing extra fiberglass insulation in the wall cavity and including an air space, which helps eliminate structure-borne noise. 9. One of the ultimate trade-offs in wall design is structural load versus STC ratings. • Increasing a wall's mass improves its STC rating. Adding batt insulation can increase this to around 39, while incorporating resilient channels could push the rating above 50. Increasing Air Space. Can you afford to give up the extra space? Typical Wall Assembly for an STC-70 Rating. (NOTE: This only applies to single stud assemblies. • Batt insulation must fit tight without gaps. The assemblies are likewise suitable for wall furring and exterior soffit applications. STC values are measurements that indicate a laboratory-tested assembly. Download the Acoustics Overview and sound assemblies to learn more. If you have an STC of 60 or more, that is considered highly isolated. Nov 27, 2019 · Sound Transmission Class (STC) is a rating system to measure how well building assemblies stop airborne sound from 125-4000 Hz. Decoupling the wall with a double-thick stud wall and 545 takes the value to 75. To determine a single STC for the wall system, first calculate the STC using both Equations 1 and 2, based on the combined weight of both wythes, then linearly interpolate between the two resulting STC ratings based on the relative weights of the wythes. RAL-TL90-186 Insulation Included: ROCKWOOL Noise-reducing drywall products are rated on transmission loss, or the number of decibels that are blocked by a wall. Address: 6301 N Florida Ave Tampa, FL 33604 Area Separation Wall Systems Area Separation Wall Submittal Sheet SA925 WB2129 SHEETROCK Shaft Wall Systems –Tested systems achieve up to 58 STC –Have achieved up to 4-hr. Unless otherwise specified, the face layers of all assemblies, except those with predecorated surfaces or exterior gypsum sheathing, shall have joints taped and fastener heads treated (minimum Level 2 as specified in GA-214, Levels of Finish for Gypsum Panel Products). Equation 2 is the STC equation for clay masonry (ref. Walls and floors in the field often measure lower than in laboratory ratings due to variations in workmanship as well as leaks and bypasses. Staggered or double stud walls are higher rated than single stud walls. Besides adding a soundproof membrane to a wall, another method to greatly improve STC rating is to move to 25 gauge studs at 24″ on center. Jun 6, 2024 · There is soundproof drywall enhanced for soundproofing, but the STC rating is negligibly higher than a double layer of type x drywall. Aug 8, 2016 · Mass Loaded Vinyl, on the other hand, increases STCs by decoupling the drywall from the studs with a thin, flexible layer, but also adding mass to the wall, which further improves the STC (by as much as 3-4 additional layers of gypsum). You cannot simply add two STC ratings together because of the logarithmic scale of decibels. It depends on the material and the quality of the wall itself Jan 26, 2021 · A higher STC rating means less sound will make its way through the partition wall – sometimes called a party wall, common wall or shared wall – creating a quieter living space. Feb 27, 2018 · Most Common Mistakes in Soundproofing – Undermining STC Ratings: Adding Drywall: Layering on additional panels of drywall is an extremely inefficient way to improve the STC of a wall. Jan 12, 2021 · To reiterate the above, an STC rating is a logarithmic value, similar to equations. to have Sound Transmission Class (STC) ratings and Impact Insulation Class (IIC) ratings of 50 as shown. The standardized STC rating accounts for airborne sound measured between 125 Hz and 4000 Hz. 1-866-949-9269. SilentFX QuickCut systems improve sound attenuation with STC ratings of 50 and higher. 10 and 1206. See the Gypsum Association publication, GA-234-2019 Control Joints for Fire-Resistance Rated Systems to achieve 1- and 2-hour fire ratings for both wood and STC values are further improved by using Johns Manville sound control batts to increase sound absorption within the floor/ceiling assembly. 0 is an indispensable technical resource for architects and contractors seeking to achieve required Sound Transmission Class ratings on their projects. Sound waves are absorbed by the wall, limiting what you hear on the other side. SoundBook 2. OITC Outdoor-Indoor Transmission Class (or OITC) is a relatively new way of measuring sound transmission, an OITC rating is designed to account for sound outdoor sounds which consists of frequencies lower than an STC rating. Standard Single-Layer Drywall - STC rating between 30 and 35; Stud Wall with Insulation - STC rating between 40 and 45; Soundproofing Drywall - STC rating between 45 and 50; Concrete Block Wall with Insulation - STC rating between 48 and 55; Specialized Acoustic Wall system - STC rating of 50 or above; Naturally, these are just approximations Sound Transmission Class (STC) is an integer rating of how well a wall, partition or a roof prevents sound from traveling from one area/room to another. May 22, 2022 · A standard wall will have an STC rating of 35-45. Steel Framing STC Values Sound Control 21/2" (64 mm) Steel Studs 35/8" (92 mm) Steel Studs STC 52 21/ 2" (64 mm) steel studs: double layer 1/ 2" (13 mm) Type X gypsum board one side, single layer other side; one thickness 23/ 4" (70 mm) JM Formaldehyde-free thermal/acoustical fiber glass batts. Adding mass. Lab-certified STC-rated up to 62 Single and double-leg channels RC Deluxe® has extra-wide screw surface for easy attachment Available in 12’ lengths ClarkDietrich resilient channel is one of the most efficient low-cost methods developed to reduce transmission of Regarding Fire-Rated Assemblies. ONE OF THE MOST EFFICIENT LOW-COST METHODS OF REDUCING SOUND TRANSMISSION IN WOOD OR STEEL-FRAMED PARTITION OR CEILING ASSEMBLIES. CAD/Revit & Acoustics Sheetrock® Gypsum Panel (UL Type SCX) Sheetrock® Brand Firecode® X Sep 23, 2024 · Typical STC Ratings for Common Materials. Oct 21, 2013 · So, for example, a 50 dB noise on the other side of an STC 35 wall will sound like a 15 dB noise to the average listener (see our Table of STC ratings and noise reduction left). When combined, you will not achieve an overall rating of 54, instead, you may see an increase in STC rating of 2 or 3 points. • An empty framed wall (steel studs and a layer of gypsum wallboard on each side) has an STC of approximately 35 • Adding an additional layer of gypsum wallboard to each side (from two sheets to four sheets) increases the STC by about 5-6 points. 3. Walls: Standard Drywall: Typically achieves an STC rating of 30-35. The diagrams and stated STC ratings are intended to serve as a guide. on wood framing. Sound Control For A Purpose Just like many other characteristics of a structure that can be optimized for the benefit of its occupants, better Features and specifications are subject to change. Double Layered Drywall with Insulation: Can achieve STC 45-50. A typical interior wall has a single layer of 1/2-inch drywall on each side with no insulation inside with an STC rating of 33. Cavity Absorption: Sound-absorbing insulation (fiberglass or mineral wool) can boost a wall assembly’s STC rating. Standard vs. It’s a relatively straight-forward proposition to achieve an STC 50 on a 25-gauge stud wall, but if the wall requires shear strength or structural load capacity, then the gauge size and spacing become a major hindrance. Dec 18, 2023 · Above is an example of a wall with a STC rating of 55. However, most require blocking levels of STC 45 or higher 1. Original: Single drywall (1/2-inch) no insulation, over wood studs: STC 33 (this is typical in many homes) Two different modifications: Double 1/2-inch drywall on each side of the wall, fiberglass batting: 44 STC Phone: 888-815-9691. Jun 19, 2020 · STC Rules of Thumb – How Changing Stud Gauge and Spacing, among other factors, Improves the STC Rating of a Wall. Feb 15, 2024 · A wall's STC can be increased by. back to top Find and download resources for STC rated wall assemblies for your construction project. Calculate What You Need for the Improvements You Want. 11 of the LABC. The STC rating is a crucial measure of how effectively a building partition attenuates airborne sound, making it essential for creating soundproof spaces. Feb 20, 2025 · For instance, a basic interior wall with 1/2" drywall on both sides of a wood frame may achieve an STC rating of 33. These wall assembly files are used for planning and estimation purposes for many UL wall types, such as fire-rated wall assemblies. Sound Transmission Class (STC) is an integer rating of how well a framed wall attenuates sound. With years of experience and expertise in the field of soundproofing, we have developed a range of STC rated assemblies and techniques to help you achieve the best possible sound This acoustically enhanced, fire-resistant gypsum core is encased in heavy, 100% recycled paper on the face and back sides and offers superior abrasion, mold, mildew and moisture resistance. Acoustic standards, guidelines and building rating systems occasionally permit an STC rating as low as 40. 875 in. † Superior sound damping, cost-efficient material that is easily finished and decorated in the same manner as standard gypsum board. An STC 40 level of blocking should be considered a minimum as privacy cannot be achieved at levels below STC 40. Identify layer details and available products. If you don’t see the STC Rated Wall Assembly you need below, contact one of our acoustical engineers with the desired First, select the hourly rating needed; Second, choose the type of design you are seeking (example – Walls/Partitions (steel framed), Floor/Ceiling (wood framed), etc. Use it for high-rated Sound Transmission Class (STC) wall and ceiling assemblies, where sound transmission between rooms or dwelling units is a concern. M2Tech paper provides additional zone of protection against moisture and mold. Traditional drywall typically has an STC rating of 30-34, but when paired with soundproofing techniques or materials, this rating can increase to 50 or –Can increase the STC rating of a double-layer, steel-framed partition from 29 to 53 STC –An integral part of high-performance CGC partition designs for attenuation of low-frequency sound from machinery and music –Suitable for use at the perimeter of fire-rated wall assemblies MICORE® Mineral Fibre Board • Doubling the mass of a wall assembly does not double the STC rating. Sound Transmission Class (STC) is an integer rating of how well a wall, partition or a roof prevents sound from traveling from one area/room to another. Excellent sound attenuation at low cost is provided when gypsum panels are resiliently attached. Jan 20, 2022 · Learn how to determine the STC rating of a wall. Lab tests are performed at NVLAP-certified laboratories in accordance with ASTM E90 and ASTM E492. Jan 10, 2025 · Precast walls will usually come with an STC rating to save you the trouble of how determining the STC rating of a wall yourself. 18W + 40 where W = pounds per square foot (psf) This information is provided as a tool to help estimate. Jan 6, 2025 · Discover the 10 most-asked construction questions, including fire-rated assemblies, gypsum board finishes, STC ratings, and mold-resistant drywall solutions. STC 45 21/ 2" (64 mm) steel studs: single layer 1/ Many components of firewalls and fire separations are helpful in hindering sound transmission between dwelling units. Flanking sound patterns, the integrity of the wall, and construction methods factor in effective sound control. STC Rated Wall Assemblies. Jul 28, 2018 · STC Ratings for Walls. May 19, 2023 · Sound Transmission Class (STC) ratings show how well a wall assembly diminishes airborne sound traveling from one room to another. com. The estimate could easily be off by as much as +/- 4 dB. Soundproof Drywall. An introduction to key terms, strategies and noise attenuation assemblies 1. The standard requires a minimum laboratory STC rating of 50 for party walls and floor/ceilings. 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 wall Features and specifications are subject to change. STC stands for Sound Transfer Coefficient and it is a measurement of the amount of sound that can transfer through a wall, floor, door, window or ceiling. 1. Ceilings should be used for sound absorption and not for blocking sound between rooms. 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. Standard Method for Determining Sound Transmission Ratings Sound insulation of ceilings is measured using Ceiling Attenuation Class (CAC). Metal stud walls perform better than wood stud walls. A typical wall with two half-inch sheets of drywall with no insulation between might have an STC rating of 33. In some stiff walls (single wood stud), a combination of approaches may make sense. It’s calculated based on how much sound is reduced across various frequencies, averaged into a single number. The lowest STC numbers you see are around 33. High-insulating wall products, as measured by Sound Transmission Class (STC), should be used to for blocking noise at an STC 45 or higher. Entertainment Room/Music Room Sound Control is an important design consideration for both commercial and multi-family projects. Construction practices have an influence on final STC ratings. Also designed for wood-frame construction are USG Area Separation Fire Walls/Party Walls fire-rated gypsum drywall assemblies for multi-family Mar 5, 2025 · The STC rating of a soundproofing product is the rating of the product alone. Mass is commonly added to existing walls by adding additional layers of gypsum. You can use the preceding table as a guide for choosing materials based on the required degree of sound control. 1 Not recommended for ceiling applications as a face layer QuietRock® 510 Benefits • Great value, offering solid performance at the lowest cost on the market • Delivers STC ratings of 47-52 • UL classified in select fire rated The STC rating for an interior wall composed of 3 5/8 inches thick drywall with one layer on both sides is around 38–40. The other part of the framing assembly are the metal studs. Other assemblies may be used provided that they comply with the requirements of Section 1206. However, you’re also losing 2-3/4” off the perimeter of the room. STC is a rating that measures how well a building partition (like a wall or floor) reduces sound transmission. Walls. The STC Score of Drywall X 5/8″ Thickness In the same wall assembly of the QuietRock, a double type X 5/8″ drywall with 3-1/2″ of insulation, green glue between the drywall layers, and steel studs on a † Use of SoundBreak XP Gypsum Board results in wall partitions with high rated STC values that are thinner than traditionally built high rated STC wall partitions providing increased usable floor space. Menu. However, occupants could still be subject to awareness, if not understanding, of loud speech. Email: info@commercial-acoustics. 52 STC for a double layer of 5/8-inch wall with green glue on one side and a single layer on the other. fire-resistance ratings with multi-layer designs (UL U415) –Oscillation tested to 1 million cycles to ensure structural performance 16 ROCKWOOL Acoustic Wall Assemblies Catalog ROCKWOOL Acoustic Wall Assemblies Catalog 17 STC 50 Assembly Components Finish material 1/2” gypsum, 2x 1/2” gypsum on single side Size 2 1/2” Steel Stud Spacing 24” oc Product AFB Thickness 1. Search. What does STC 60 mean? STC 60 is a rating on the Sound Transmission Class (STC) scale, which measures the degree of sound control in a building. In general, loud speech can be understood fairly well through an STC 30 wall but should not be audible through an STC 60 wall. Double-Pane Windows: STC 35-40. Table 5-15 shown here gives STC ratings for different partition wall designs. Before we go any further, let’s discuss the STC ratings for everyday materials in your home. at SOUND TRANSMISSION CLASS RATINGS. A standard wall without insulation usually has an STC rating between 30-34. A reduction of 10 STC levels results in an apparent sound reduction of 50% Aug 16, 2019 · QuietRock 545 on a single stud wall has an STC rating of 56. When the mass of a barrier is doubled, the isolation quality (or STC rating) increases by approximately 5 dB, which is clearly noticeable. And keep reading to learn about Outdoor-Indoor Transmission Class, which takes transportation noises into account for building materials used on exterior assemblies. ) May 6, 2024 · As a result, be sure to check the STC rating for all components, such as windows and doors that will be installed in the wall assembly. Windows: Single-Pane Windows: STC rating of 25-30. Construction materials companies use a rating system called Sound Transmission Class levels, or STC, to determine how effective a product is at When the mass of a barrier is doubled, the isolation quality (or STC rating) increases by approximately 5 dB, which is clearly noticeable. The SoundBook® is the industry’s leading resource for technical details and sound-rated assembly drawings – all in one place. Adding absorptive material (soundproofing systems) Conclusion: Determining the STC Rating of a Wall. Bedrooms should have a rating of 52, while bathrooms, kitchens and living rooms have a rating of 55. Doubling up the 545 on that type of wall construction produces a quiet value of 80. Contact; 1-866-949-9269 Feb 13, 2023 · To determine the STC rating of a wall, drywall, or window, there are several factors to consider: Material: The type of material used in the construction of the wall, drywall, or window can significantly impact its STC rating. Some are UL tested and ASTM rated. Measure the sound in the neighboring room: Next, proceed to the adjacent room and note the number of transferred decibels. PABCO® Gypsum cannot guarantee actual STC ratings. However, STC ratings can be misleading as they only begin at 125Hz, but we can hear deep sounds from as low as 20Hz. • (5 or 6 points) in laboratory STC ratings for essentially similar assemblies. For example, if the generated sound enters the wall at a particular decibel reading, and the sound measured on the other side of the wall is lower, the result is the STC for that wall assembly. Adding insulation between the walls of your rooms might be a great investment for your own peace and quiet. ) reduces airborne sound transmission. National Gypsum Company has published the industry’s most comprehensive guide for sound-rated assemblies. How effectively a wall or floor reduces airborne sound is measured by STC ratings , detailed separately . The Role of Drywall in Achieving High STC Ratings 1. To determine the STC rating of a wall in a lab, they can test out frequencies from 125 Hz to 4000 Hz. Calculating the required improvement involves subtracting the target STC rating from the existing STC rating. Since an STC-70 rating is rarely required in a normal residential scenario, there are few examples available that provide detailed guidance. Whether protecting an inside room from an outside noise, or noiseproofing an inside space, acoustic drywall is for wall assemblies and spaces requiring high sound transmission class (STC) performance. Understanding STC ratings for drywall can be complex. S. • Doubling the mass of a wall assembly does not double the STC rating. There’s a handful of other soundproofing products offering greater STC ratings than standard drywall. STC Ratings for Everyday Materials. Nov 7, 2016 · Commercial Acoustics explains how to determine the STC of a Wall, and what most common STCs are achieved with conventional construction methods. 1): Dec 30, 2022 · How Is a Wall’s STC Rating Calculated? STC rating can be determined by employing the following STC calculation formula: Use an audiometer to record the decibel levels in the room containing the noise source. heavier concrete masonry walls have higher STC ratings. Mar 30, 2023 · What is the STC rating of drywall? What else should I know about STC ratings? What is a good STC rating for windows? How can I improve my STC rating? How to Measure STC Rating? Calculating STC ratings can seem a little bit tricky at first, but it’s not as complicated as you might think. 2. In soundproofing studios we want to have an STC between 50-65. Understanding STC Ratings for Drywall. This is a demising wall between hotel rooms or between the rooms and a hallway. Jan 28, 2025 · Impact of Different Materials on STC Ratings. In the USA, it is widely used to rate interior partitions, ceilings and floors, doors, windows and exterior wall configurations (see ASTM International Classification E413 and E90). Installing insulation within a wall or floor/ceiling cavity will improve the STC rating by about 4-6 dB, which is clearly noticeable. Our STC rated wall assemblies and STC ceiling assemblies are designed to provide effective soundproofing solutions for both residential and commercial spaces. No products in the cart. 5” Acoustics Assembly Number: ISS-22 STC: 50Report No. Abuse resistant per ASTM C1629. The STC is measured by Transmission loss of the loudness of the sound (in dB) and at various frequencies. Soundproof Wall Systems: Specialized systems can reach STC 55-60. An STC This STC Wall Calculator estimates the Sound Transmission Class (STC) rating of a wall assembly based on various materials and configurations. . Achieves best possible score of 10 for mold resistance per ASTM D3273. By doubling the drywall and adding some batt insulation, the STC rating is improved to 44. Here you have helpful videos on how to properly install our stc rated wall assemblies and stc ceiling assemblies. A wide variety of STC ratings is available with concrete masonry construction, depending on wall weight, wall construction and ¿QLVKHV In the absence of test data, standard calculation methods exist, which tend to be conservative. The target ratings are dependent on the adjacency and occupancy class on each side of the wall – a band room may not need a high STC wall if placed next Nov 8, 2023 · Where control joints occur in acoustical or fire-rated partitions, special consideration should be paid to the control joint materials to ensure the continuity of the fire or STC rating. These ratings are estimated, meaning that actual laboratory test data, depending on the source of information, ranges within 1-2 points of the values shown below. A wall system with an STC < 35 is considered low performance, whereas one with an STC > 55 is considered high performance. Sound Transmission Class (STC) measures the reduction in sound decibels (dB) transmitted through walls and ceilings. Similar to STC, the higher the OITC value, the The STC rating of a CMU wall can be estimated based on its weight using the following formula: STC = 0. Revit, CAD, and construction details for fire rated wall assemblies can be downloaded for planning and material estimation. Select materials for sound absorption according to their STC ratings. Others, not so much. An STC of 50 is a common building standard and blocks approximately 50 dB from transmitting through the partition. Dec 5, 2024 · Using materials with high STC ratings ensures conversations remain private and disturbances are minimized. The STC of 55 is achieved by using a double layer of 5/8″ drywall on each side and rockwool insulation inside the wall cavity. Sound Transmission Class (STC ) is an integer rating of how well a building partition attenuates airborne sound. Some might deliver better results and fall within your project budget; others seem to cost a fortune and may not be realistic for your project. Drywall on both sides of the wall measuring half an inch thick, with fiberglass batts has a 44 sound transmission class. Have a Question About Assemblies? Call: 1-800-USG-4YOU STC Rated Wall Assemblies Target Sound Transmission Classification (STC) Ratings are the recommended partition STC that will provide acceptable privacy and sound attenuation between spaces. May 2, 2022 · What Is STC? Before we can go over the comparison of QuietRock to regular drywall we need to understand STC ratings. The STC value QuietRock® 510 installs and finishes like standard drywall, requiring no special tools or training to use. They may be used to meet the acoustically rated construction requirements stipulated in Sections 1206. Conference Room/Classroom 2. For example, a wall may have an STC rating of 34 and a single sheet of drywall may have a rating of 20. Ideal for interior walls in hotels, restaurants, hospitals, schools and even in home theatres, music rooms, and bedrooms. Pros One 5/8” layer provides sound stopping results Mar 6, 2018 · If you do not have wall height constraints, then simply moving to 25-gauge studs at 24 inches on center will improve the STC of your wall by 5-7 points or more! Furthermore, this reduces material cost by using thinner metal studs and using fewer of them (50% fewer if moving from 16 inches on center). Insulation will noticeably improve the STC rating of an assembly. In addition to information on our stc rated assemblies and stc rating wall assemblies, these videos offer valuable insights to make your soundproofing project a success. Mar 7, 2025 · For commercial-grade STC ratings, you could aim as high as 60, which is more than enough to reduce the sound in a firing range. This gives some varied answers for sure, which is what is used as part of an average to give an official STC rating. Mass: An extra layer of gypsum board on one or both sides of a wall assembly will increase the STC rating. STC value, the better the wall assembly is at reducing sound. STC Ratings & Steel Stud Framed Walls . Jun 15, 2024 · The Sound Transmission Class (STC) rating of 5/8” drywall mounted with standard 2″x4″ studs is 33 and a staggered wood stud wall is 48, providing excellent noise control. However, the STC rating will differ from room to room. STC is the wall equivalent of CAC. Find Revit and CAD files for STC and fire rated UL assemblies. High STC ratings with fewer layers of gypsum board than traditional assemblies. Sound transmission class (STC) is the rating system used to measure a partition wall's ability to reduce the effect of airborne sound. Login ; Cart 0 Items View Cart. The higher the STC rating, the better the Aug 30, 2023 · Six variables to consider for optimal STC ratings. jwu tztit jvg kxgqar xvwp tycjyomk zqyygt quhux rhflcf icqbpt buc yyw otsy jalu efyji