Osb stc rating. 2b)—2-Sided LP FlameBlock panels required .

Osb stc rating (6. Acoustic panels. This underlayment is manufactured by Roberts. (3. sold for low prices with many bonuses and discounts at trademark soundproofing, the online leading Mar 16, 2009 · 50 (with OSB) 56 (concrete + resilient mat) Topping over the subfloor alters flanking transmission (various toppings) Altered flanking via floor surfaces Direct transmission STC 57 Figure 6. Assemblies with a range of STC ratings are available, including options with an STC rating greater than 50 for party walls in multifamily buildings. In real life a batt would be cut to fit around utilities and boxes leaving sound Jun 5, 2024 · board (OSB) panel with a fire-resistant Pyrotite® treatment covering one or both sides. If you build a doublle wall with just two layers of 5/8" drywall on both sides and achieve an STC of 63 then your door must also Sep 18, 2015 · Acoustical Rating There are two common measures of sound performance: Sound Transmission Class (STC) and Impact Insulation Class (IIC) ratings. 9 top of 15-mm OSB 70 * Lightweight Table 4. In addition to providing burn-through resistance and a Class A Flame Spread rating, this layer reinforces the OSB Aug 30, 2023 · Six variables to consider for optimal STC ratings. When trying to make a wall or other structure soundproof, there are four main principles to take into consideration. Nov 20, 2024 · Fire-rated Construction Acoustical Performance Partition Applications Fire Detail & Physical Data Description & Test No. The greater the value of STC, the less sound is transmitted through the building component. A higher STC value means better soundproofing. The STC value 4 days ago · 17) Heather Thorn: Could you tell me what the STC rating would be for a wall constructed as follows: 2 x4 wood framing, 16' on center, Rockwool 3' Safe and Sound, 5/8 drywall, green glue standard application amount and a 2nd layer 5/8 drywall. Mass 2. CAD/Revit & Acoustics. Technical Bulletin : ROCKWOOL 8024 Esquesing Line, Milton, ON L9T 6W3 T: 905-878- 8474 or 1- 800- 265-6878 www. Video explanation clip "Sound" (2: Nov 15, 2021 · 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. For comparison with the QuietRock, the wall assemblies are the same. Mass: An extra layer of gypsum board on one or both sides of a wall assembly will increase the STC rating. 5 mm (25 gauge) steel studs 7/16" OSB or plywood and stucco, siding, brick or stone. Oct 2, 2019 · Smoke, mirrors, and STC/IIC ratings. That STC Nov 19, 2024 · These data have been retained in this Selector to serve as a guide to the designer. Water repellent . In wood-framed construction, the internal stud walls generally form a part of the load-bearing structure; consequently, plywood or OSB shear panels are often used within the stud walls in order to provide structural stiffness for the building to resist wind loads Required STC Rating and Determination of Compliance Finally, based on project information entered the tool will indicate the required STC rating for the wall assembly being evaluated and whether or not the materials specified will produce a combined rating that meets this requirement. The STC provides an indication of how loud transmitted sound is perceived to be by the listener. Thickness, Rating and Material Standards (1) Where wall sheathing is required for the purpose of complying with this Section, it shall conform to Table 9. So, according to the STC rating, drywall will not be able to block complete sound transfer from any area. This is basically a measure of the reduction of sound passing through the wall. nw. It’s made from recycled felt fibers, making it an eco-friendly option The Compound is designed to be used between two layers of standard building materials such as drywall, OSB, MDF, cement board, or plywood measuring at least 1/2 in (12 mm) thick. They can be hung in different areas to help control echo, feedback, slap and STC OITC M9896. Ultimately, every architect needs to determine their STC requirements and the most cost-effective way to meet them. Thicknesses of 0. STC Description System Rating & Test No. Cavity Depth: A deeper partition cavity can increase the amount of sound Jul 25, 2016 · Oak floor on plywood substrate, 32oz Acoustiblok, OSB subfloor, channel ceiling . Trowel glue across the top of first layer of plywood or OSB. 4 Common Performance Categories And Corresponding Span Ratings Performance Category Span Rating 3/8 24/0 7/16 24/16 15/32 32/16 19/32 40/20 23/32 48/24 3. Structural I OSB panels comply with the following: Quality verified by APA Jul 26, 2017 · The intent was to review STC (Sound Transmission Class) ratings of standard wall assemblies that were being designed and specified by the internal architect. Duct Board. May 22, 2022 · Comparison of How Insulation Improves the STC Rating of a 2”x4” partition wall with 1/2″ drywall on both sides and an initial STC between 33 and 35. Basement Wall . 27 — Standard method for evaluating ceramic floor tile installation systems Passes cycles 1-6 C627 Light commercial Light Light Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. Products Products > Pipe Insulation. available in many thicknesses, weights, and sizes. To reduce See more Apr 23, 2024 · • • • • •Sound transmission Coefficient (STC) rating During general full scale wall testing, cellulose effectively reduces the airborne sound from room to room. Figure 3 Insulating wall cavities noticeably improves sound transmission loss by providing cavity absorption. S. or Table 9. Wd Stud—2 layers 5/8 SHEETROCK Brand gypsum N/A J panels, FIRECODE core, outside, both sides—5/8 SHEETROCK Brand gypsum panels, FIRECODE core, inside, both sides—2 rows System WP1015 – STC Rating 55-59 Base layer 1/4” gypsum wallboard applied parallel to each side of 2-1/2”, 18 mil (25 ga. 2. What is an STC rating? Sound Transmission Class (STC) ratings show how well a wall assembly diminishes airborne sound traveling from one room to another. 1/2″ Sound Transmission Class (STC ) is an integer rating of how well a building partition attenuates airborne sound. CONTENT Base System 3 Carpet Topping 4-5 Laminate & Hardwood Topping 6-7 Ceramic Tile Topping 8-9 Vinyl Topping 10-11 Notes 12 What is the STC rating of OSB? There’s one key aspect of soundproofing that needs to be considered, though and that’s the Sound Transmission Coefficient (or STC) rating of each material. attenuates airborne sound. Concrete with Ceiling. Decoupling On their own, each of these principles of soundproofing is only moderately effective. (See also Sentence 9. The term STC translates to Sound Transmission 3 days ago · Fire Rating: 2 hours: System STC: 66 System Thickness: 11. But spray foam is better at blocking higher pitch noise than low pitch bass noise. In addition to providing burn-through resistance and a Class A Flame Spread rating, this layer reinforces the OSB May 9, 2023 · Exterior ratings are for panels and sheathing that will be subjected to extended exposure to the elements. 3/8” base coat and min. 3 Apr 4, 2022 · The Subfloor is 3/4” OSB over 16” o. USG provides resources here for our UL wall assemblies for seamless integration into any construction project. 2b)—2-Sided LP FlameBlock panels required (STC) rating of 61 with opposing wall studs staggered INTERIOR LOAD-BEARING WALL – UL DESIGN NO. Reference 2 hr. STC. If the F4d floor assembly is modified with a layer of resilient channel between the two layers of wallboard, the Mar 20, 2020 · transmission loss (STC). Feb 14, 2025 · The OSB facers act as the flange of the I-beam, while the rigid foam core provides the web. 005mg/m2/hr) 13 Nov 2, 2012 · standard reference curve to determine the STC rating for the tested assembly. KINETICS WAVE Hanger 7/8" Drywall Furring (Hat) Channel 2 Layers 5/8" Type X Gypsum Board: 60: 56: AT001094: Description STC IIC Sections Test # Wood Flooring There’s one key aspect of soundproofing that needs to be considered, though and that’s the Sound Transmission Coefficient (or STC) rating of each material. Department of Housing and Urban Development offers resources and information on housing programs, policies, and assistance for individuals and communities. Mar 9, 2018 · oriented strand board (OSB). ft. In the USA, it is widely used to rate interior partitions, ceilings and floors, doors, windows and exterior wall configurations 2 days ago · Use the STC Calculator to find the STC Rating of your wall by filling out the form below. However, when Delta and HIIC ratings as well as IIC and STC are provided it creates a more complete picture and accurate reflection of testing. Lab tests are performed at NVLAP-certified laboratories in accordance with ASTM E90 and ASTM E492. Apr 23, 2024 · • • • • •Sound transmission Coefficient (STC) rating During general full scale wall testing, cellulose effectively reduces the airborne sound from room to room. The Rw rating is calculated from a series of tests that measure the sound transmission loss across a wider range of frequencies, from 100Hz to 3150Hz. Use of vaulted ceilings increases required STC rating of windows above those listed. Pros. Determine Target STCs. High-STC-rated doors are essential for spaces where privacy, noise control, or productivity is a priority, such 5 mm plywood, OSB, or waferboard, or 17 mm tongue-and-groove lumber; 38 mm x 235 mm wood joists spaced at no more than 600 mm o. Here’s a website that tests various materials: layer of plywood or OSB on one side of the studs, followed by the required layers of drywall to achieve the fire rating. 02 113-11-R0 5/8” Type X Gypsum 2x4 wood studs, 16”o. ), steel studs 24” o. 6 lb/sf MLV with a stand-alone STC rating of 22. May 4, 2021 · • Allows for standard OSB design values, while FRT plywood must take deductions • Sound Transmission Class (STC) rating of 62 INTERIOR LOAD-BEARING WALL – UL DESIGN NO. You could add plywood or OSB to the exterior. After the Jun 8, 2023 · WHAT IS STC? STC stands for Sound Transmission Class. well a building partition . Table 9. For an interior wall that is made of 3 5/8″ metal studs with one layer of 5/8″ gypsum board on both sides, the STC rating is about 38–40. Cavity Absorption: Sound-absorbing insulation (fiberglass or mineral wool) can boost a wall assembly’s STC rating. Adding a floor topping to reduce flanking via the floor/floor path significantly improves the system’s ASTC rating. -A to A-9. Available performance categories: 7/16˝, 15/32˝, and 19/32˝ a building solution that meets building code requirements for fire-resistant construction while increasing structural ratings. While STCs are a good one-number approximation for the soundproofing capacity of a wall, they are limited in a few ways: Other substrates include particle board or OSB (underlayment grade), vinyl composition tile (VCT Where bracing material, such as diagonal lumber or plywood, OSB, gypsum board or fibreboard sheathing is installed on the inner face of one row of studs in double stud assemblies, the STC rating will be reduced by 3 for any assemblies containing absorptive material in both rows of studs or in the row of studs opposite to that to which the bracing material is attached. ZERO Water, Glues, Chemicals added. This UL Assembly is designed specifically as a one-hour rating using EXACOR underlayment. Its 0. Typical size is 4 ft x 8 ft, but other sizes may also be produced. c 3. with 1” Type S drywall screws 12” o. 3/4" T&G was rained on several times. OSB means Oriented Strand Board which is produced from aspen trees. Blown-in Insulation. 2 mm) for For fire ratings and IIC and STC sound test data, refer to the USG Levelrock® and USG Durock™ Fire & Sound Rating Guide (IG1685) at usg. As an acoustical Download scientific diagram | Flanking paths and typical effect on the Apparent STC, with one layer of directly-applied gypsum board on the flanking wall, and a sub-floor of one layer of OSB or May 22, 2024 · Like the STC rating, it measures the ability to reduce sound transmission across a range of frequencies. Exposure 1-rated panels and sheathing can withstand exposures to inclement weather during construction, but are not Jul 29, 2021 · 7/16˝to provide consistency with 7/16˝standard OSB where applicable § Roof Sheathing in roof deck applications for construction Type I and II (ESR-1365 Section 4. In the U. Face layer 5/8” Type X gypsum wallboard applied parallel 3 days ago · Below please find STC rated wall assemblies based on our acoustic lab tests and INSUL models. As soon as someone turns on a TV or makes noise on the other side of that wall, some of Dec 18, 2024 · The STC rating is an important metric that helps quantify how well a material or assembly reduces the transmission of airborne sound. c None 7/16” OSB Grade D Building Paper 1” ROCKWOOL Comfortboard 80 min. Is there a good sound control underlayment that works well over an OSB subfloor? I have looked around and the issue is that all products I have seen have their IIC and STC ratings over concrete, poured gypsum, or when it’s a wood or open web truss floor it’s in conjunction with poured gypsum. Nov 20, 2024 · improving the IIC and STC ratings of a variety of subfloors such as plywood, OSB, pre-cast concrete, concrete and corrugated steel deck. Doubling the drywall on steel studs brings the STC to 58, plus it doubles the fire rating to 2 hours. It’s an integer rating that tells us to what degree a building partition (such as a wall or ceiling) reduces the force of airborne sound. Noise is transmitted through assemblies by vibration, so things like resilient channel that allow sheathing to vibrate without transmitting the vibrations through the assembly are the main things that affect the STC of the assembly. STC 35 Loud speech audible but not intelligible There are many new or specialty type materials available to improve the STC An assembly with acoustic dampening properties for use in building or structure construction, a first panel, a second panel, and one or more connection elements therebetween. Are structural Oct 2, 2014 · • Full Load/Span Ratings With No Deductions • Available In A Variety Of PS2-Rated Thicknesses And Lengths, Including Struc-1 • Class A Flame Spread Rating And Passes 30-Minute Flame Spread Test (Per IBC 2303. Batts. This could be considered a baseline when you are getting serious about preventing sound transmission. Damping 4. 11c. e. Test Setup: STC testing is typically performed in a laboratory or specialized facility designed for acoustical testing. What Is an STC Jan 15, 2025 · Sound control is measured in STC ratings (sound transmission coefficient). 3. Good sound blocking materials are OSB (Oriented Strand Board), MDF (Medium-Density fiberboard), cement board, or Mass Loaded Vynil (MLV). 9 35-mm concrete on 68 2 layers, 15. | 6900 Interbay Blvd. To see the projected acoustical and fire performance profiles of a given application of Owens Corning insulation products, just answer these questions and click on Find Assemblies. I'm thinking of adding a layer of 1/2' or 5/8" OSB on top of the 3/4" T&G after the roof is on, which should be mid-next week. Tampa, FL 33616 Dec 31, 2024 · STC, or Sound Transmission Class, is a measurement that indicates how effectively a material or structure reduces sound transmission. The significance of STC numbers is illustrated in the following chart from the Acoustical and Insulation Materials Association. c. Incorporating materials May 28, 2024 · It features an STC rating of 66 and an IIC rating of 67, both of which indicate very effective sound insulation properties. rolls, or 360 sq. It was attached with 9D nails on 203. rating is based on tests conducted to industry recognized A. Jul 6, 2012 · I'm looking for some advice on adding a second layer of OSB to a 3/4" T&G subfloor. Download EXACOR Fire Resistance Mar 29, 2018 · The STC rating for drywall on hollow wood studs is about 33 decibels — almost the same as your home when it’s totally quiet. , it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Multifamily Fire-Resistance-Rated Wall Assemblies. In sum, STC tells you how much a ceiling or wall might stop sound. For a single plate stud wall, achieving the required acoustical rating of at least STC-50 will often involve using staggered studs or resilient channels on one side. Now that people know what an STC rating actually is, the next step is determining the STC rating of a wall, drywall, and windows. ft. INSTALLATION Feb 15, 2025 · 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. This allows us to compare and rate different materials and assemblies as to how they perform in providing improved sound control. However, it follows a slightly different calculation method. -B that provide generic data on the STC ratings of different types of wood stud walls and STC and IIC ratings for different types of wood floor assemblies, respectively. 9 mm (5/8") Gypsum Board Single Layer of 5. Basement walls. Lay down first layer of 1/2-inch thick plywood or OSB with joints staggered in relationship to Soundmatt joints. Board. 9 m (5/8 OSB is a timber product so it is subject to the effects of moisture ingress. That will make a conversation inaudible and loud conversation a murmur. 2) • 15-Minute Thermal Barrier (UBC 26-2) • Patented, Non-Combustible Pyrotite Layer Bonded To LP OSB. Tables A-9. As Thorburn notes, “In the past, using multiple layers of gypsum 2 days ago · Find resources and details for UL rated wall systems with the required STC and fire ratings for your project. 15/8" (41 mm) Steel Studs or smoke developed ratings are not intended to reflect hazards presented by these or any other materials under actual fire Fortunately, many wall assemblies now offer 60-plus STC ratings—and architects don’t have to pay extra for the improved sound reduction. Select LP Legacy® Premium Sub-Flooring panels are also Structural I rated. Soundproofing Membrane. 10c. By itself, a Formance SIP has STC OSB-4204 December 2018 (Expires 12/2020) , Weyerhaeuser, Forte, Javelin, Microllam, Parallam, TimberStrand, TJ, TJI, and Trus Joist are registered trademarks and Edge, Edge Span rating indicates the maximum single-layer floor support spacing for floor panels or the maximum roof/subfloor support spacing for sheathing panels. standards . of traditional backerboard EasyMat 6 5 4 3 2 1 SET TILE DIRECTLY OVER ANY ACCEPTABLE SUBFLOOR 1 Any acceptable subfloor including concrete, plywood and primed OSB 2 ®CUSTOM polymer-modified mortar 3 EasyMat® 4 ®CUSTOM polymer-modified mortar 5 ®Polyblend ® or Prism SureColor Grout 6 Ceramic tile or stone Noise attenuation with high STC rating - 30dBA at 10mm thickness board only. Systems attaining ratings less than 55 STC and IIC provide only marginal acoustical performance. Aspen logs are prepared by cutting aspen trees. Use our resources below to find more cost-effective ways to improve your STC Rating, or use the STC Calculator to determine alternate Jan 20, 2022 · In order to achieve the maximum level of performance from your soundproofing materials, it is essential first to know the specifics of the area they will be encasing, starting with the STC ratings of your walls. 17ga self-furring lath min. 5 in. For more floor underlayment options please see our article Best Soundproof Underlayment. Mar 21, 2021 · STC rating is a standard measurement determined in labs. The STC Rating is 66db, and the IIC Rating is 67db. Exterior swing doors. ; This floor has a typical STC rating of 36 and an Impact Insulation Class rating (IIC) of 32. com. Jul 6, 2021 · OSB Sheathing 9. 2 mm centers along perimeter and 304. The Pyrotite treatment consists of a layer of fiberglass-reinforced magnesium oxide cement tightly bonded to the OSB surface. Variety of uses. The estimated ratings are based on 3/4" OSB R-19 Batt Insulation 18" Open Web Wood Joist at 24" O. Oak floor on plywood substrate, 16oz Acoustiblok, OSB subfloor, channel ceiling determines the STC rating of the tested partition. Sound Transmission Class (or . Adding shear wall sheathing to a wall assembly can actually increase its acoustical performance in certain circumstances because it adds mass to the assembly. 9 2 layers 15-mm OSB 60 2 layers 58 15-mm plywood 2 layers, 15. Absorption 3. 4. *Exact STC, IIC, and HIIC rating depends on UnderBlock thickness (2mm, 5mm, 10mm, or 12mm). U350 (TYPE B) (2-HOUR PARTITION WALL; FIRE-RATED ON BOTH SIDES) • Commonly used in Type V 2-hour partition walls • Reduces material/labor costs and dead load by The STC rating of a partition does not guarantee a quiet environment if the room lacks adequate sound absorption. They generally range between STC 40 and 50. 2. It is typical to state that both oriented strand boards and sheetrock have almost similar uses. While the assemblies were expected to achieve STC 50 or higher on the Wall Schedule, there were still a fair number of noise complaints in the complex. If you have questions on your floor-ceiling assembly, please contact us at 1-800-679-8511 . A wood stud wall with regular 5/8” drywall and 3-1/2” of insulation has an STC of 46, with steel studs that will improve that to 49. Layer 2 - Gypsum Panel: Mar 11, 2024 · These ratings indicate the underlayment’s ability to reduce impact noise and airborne sound transmission, respectively. A typical exterior wall consists of a layer of drywall, 2×4 framing, R-13 insulation, a layer of OSB sheathing, and either siding, stucco, or brick with the occasional window or door. Acoustiblok, Inc. 4 Exception • 2021 IBC Section 706. The test setup involves Jun 5, 2024 · • Allows for standard OSB design values, while FRT plywood must take deductions • Sound Transmission Class (STC) rating of 62 INTERIOR LOAD-BEARING WALL – UL DESIGN NO. U350 (TYPE B) May 22, 2022 · Adding a 2” layer of EPS into the cavity so there is a 1-1/2” air space left, will improve the STC rating of the wall 5 or 6 points to 40 or 41. 45 N 1. Typical STC Requirements. An alternative, used for various reasons, is a double-stud Aug 31, 2017 · The U. 1/2″ drywall adds an SCT rating of +3 and 7/16″ OSB offers a rating of +4. ) 3) Construction separating a dwelling unit from an elevator shaft or refuse chute shall have an STC rating of not EXACOR ® underlayment panels are specifically engineered to meet the fire-rating, Can help achieve sound ratings without the need for a sound mat when used as part of a STC/IIC-tested floor/ceiling assembly. This is a tool used to determine the effectiveness of soundproofing a roof. Best uses. vs. EXACOR How to Install Series l ½ underlayment over OSB subfloor l Pt l Intro to EXACOR™ underlayment Sound Transmission Class (STC) rating of 61. Manufactured from waterproof heat-cured adhesives and rectangularly shaped wood strands that are arranged in cross-oriented layers, OSB is an engineered wood panel that shares many of the strength and performance characteristics of Instructions. ” Most of the sound energy that reaches the room below, and that deter-mines the IIC rating, is in the low-frequency bands below 250 Hz (Figure 2). The STC of OSB is only slightly better than May 21, 2008 · 2 layers, 15. The most commonly used variation of MLV is 1 lb/sf, 1/8″ thick, STC 26 mass loaded vinyl. Assemblies with a range of STC ratings are available, including options with a STC rating greater than 50 for party walls in multifamily buildings. 11. wall Sheathing Thickness and Specifications Mar 30, 2023 · An STC rating of 45 is really where we get into the world of soundproofing and privacy. 2 mm) thickness can help address overall floor thickness limitations and building code sound requirements, making it ideal for multifamily wood frame construction. Ratings Standard Rating Design Number I-Joist Height Insulation Gypcrete Carpet Vinyl STC IIC 9-1/ Nov 7, 2016 · You can usually add stuff to wall and floors without affecting the STC rating as long as the required components are still present. U350 (TYPE B) (2-HOUR PARTITION WALL; FIRE-RATED ON BOTH SIDES) • Commonly used in Type V 2-hour partition walls • Reduces material/labor costs and dead load by LP OSB LP OSB 1-SIDED LP FLAMEBLOCK SHEATHING 2-SIDED LP FLAMEBLOCK SHEATHING Nominal panel thickness and weights of LP FlameBlock Fire-Rated Sheathing • Roof sheathing for 4 feet on both sides of a fire wall (ESR-1365 Section 4. 1. Sep 23, 2016 · The Ontario Building Code | Thickness, Rating and Material Standards 9. To give you a rough idea of what STC ratings are typically used in different environments, let’s take a look at Dec 1, 2016 · The higher the STC rating, the better the assembly is at reducing the transmission of sound. Elevated Temperature . More; Assembly Construction. jumbo rolls, which are perfect for contractors looking to cover many apartments quickly. 5” ROCKWOOL Comfortbatt No Sheathing Grade D 2 days ago · installation guide showing how to install mass loaded vinyl. 5” I-Joist spaced 24” o. Jul 10, 2024 · The STC rating indicates how well a wall assembly blocks airborne sound. STC values are measurements that indicate a laboratory-tested assembly. STC is a sound rating that attempts to measure the effectiveness of an assembly in addressing ambient or airborne sound. 4 mm, 1 foot = 0. Apr 17, 2020 · OSB, pre-cast concrete, concrete and corrugated steel deck. Jan 4, 2016 · The S. STC) is an integer rating of how. . It doesn’t. com 3 : Aug 16, 2019 · STC ratings. 1-A and 9. Reducing the Jul 19, 2017 · Note: The OSB was adhered to the trusses with Loctite PL 400 Subfloor adhesive. Pipe and Tank . Sounds defined in this range include voices, music, televisions, pet noises, and others common to habitation. These are: 1. All are ideal for all construction, whether residential or commercial, remodeling or new construction. The TRIFORCE® open joist is a prefabricated parallel chord joist with a structural-quality OSB panel at one end that can easily be trimmed up to 24 in. From making furniture, doing subfloors, doing both internal Mar 5, 2021 · The overall STC rating is an average of the STC ratings measured between 125 Hz and 4,000 Hz. Basements are excluded, as long as basement windows and sliding glass doors have minimum STC ratings of 30. M. Clips improve all frequency sound control. Apr 30, 2024 · class (STC) ratings describe a floor’s ability to isolate airborne sounds such as speech. 01 113-11-R0 5/8” Type X Gypsum 2x4 wood studs, 16”o. T. Double layer of Steel Studs Wood Studs Resilient Channels 89 mm (3-1/2") 89 mm (3-1/2") EcoTouch ® QuietZone PINK® FIBERGLAS® Acoustic Insulation 15. 16. 49 / 61 . 25-30 STC: Normal conversations are easily audible through the walls. Oct 3, 2024 · If the STC rating of any material is high, the soundproof capability of that material is also high. This added benefit Mar 21, 2024 · Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. 3. Overall the STC rating increases from 29 to 43. Most notable is the increase in the 630 Hz band. 1. U350 (TYPE B) (2-HOUR PARTITION WALL; FIRE-RATED ON BOTH SIDES) Commonly used in Type V 2-hour partition walls Reduces material/labor costs and dead load by eliminating STC Ratings The term STC refers to the single figure of evaluation used to quantify the transmission of airborne sound through building elements, such as walls or floor systems. Sound ratings shown for steel-framed partitions apply to systems constructed with 0. 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. Tiger Foam Low Density Oct 10, 2022 · With an STC rating of 66 and an IIC of 67, it reduces sound transmission between floors and echo within rooms. 0 Installation Dec 10, 2024 · by the IIC rating. This consists in measuring the loss in sound intensity (in deciBel) between two rooms. It’s the first level where Jun 5, 2024 · • Allows for standard OSB design values, while FRT plywood must take deductions • Sound Transmission Class (STC) rating of 62 INTERIOR LOAD-BEARING WALL – UL DESIGN NO. An STC 50 wall may be sufficient for apartment-to-apartment, but may be well below the expectations of a high-end condo. A double layer of drywall with Green Glue installed on one side of the same wall will give you an STC of approximately 45 (compare that to 2-3 points achieved with insulation, MLV or just another layer of drywall) a 2nd layer of drywall with May 14, 2021 · Sheetrock alternatively gives a poor STC (Sound Transmission Coefficient) rating compared with the OSB's STC rating. A. This includes, inter alia, Tables 9. The frequencies used in STC ratings correlate in a general way with subjective impressions of Jan 20, 2022 · 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. There’s also 2 lb/sf MLV with a stand-alone STC rating of 31, and 0. The OSB substrate of LP FlameBlock sheathing also has an Exposure 1 classification—which signifies that panels are intended to resist the effects of moisture on structural performance during active construction. 49/1. This design is extremely strong and eliminates the need for additional framing. The higher the STC rating, the better the sound insulation. Can help achieve sound ratings when used as a part of a STC/IIC-tested floor/ceiling assembly. SIP manufacturers can provide more information on these assemblies. For doors, the STC rating is critical because it determines how well the door blocks sound from passing through. 125 in. 8 mm centers along trusses. However, if the space between the gypsum boards and the metal studs is filled with batt Feb 14, 2025 · A standard 2 x 4 wall 16" OC with 1 layer of drywall on each side has an STC rating of approximately 32. Tested Properties The OSB facers act as the flange of the I-beam, while the rigid foam core provides the web. 9c. Some flaking. Assembly Construction. It does not Sep 10, 2023 · It’s up to the contractor to construct walls that meet these “STC” requirements. The test measures airborne sound transmission loss between 125 and 4000 Hz IIC. I-joists are 16" oc. Layer 1 - Gypsum Panel: 1 layer 1/2" [12. This level is common in spaces with minimal soundproofing Nov 15, 2021 · A reference guide for acoustical assemblies and STC ratings in insulation systems, commercial roofing, and engineered products. mass loaded vinyl is applied to walls, ceilings, floors and structures to add mass to the wall which prevents vibration and lessens sound transmission. U350 (TYPE B) (2-HOUR PARTITION WALL; FIRE-RATED ON BOTH SIDES) • Commonly used in Type V 2-hour partition walls • Reduces material/labor costs and dead load by Nov 20, 2024 · Rating 0, No growth 10/10 Rating 0, No growth 10/10 Rating 0, No growth 10/10 Surface-burning characteristics flame/smoke E84 0/0 0/0 0/0 Thermal “R”(°F-ft²-h/Btu)/k (Btu-in/°F-ft²-h) C518 . These types of sounds would be the equivalent of voices, radio, or television in the context of a multi-family building. This is new construction. The Jan 23, 2025 · Oriented Strand Board (OSB) Grades It has become increasingly common to grade panels in accordance with performance-based standards. Jul 21, 2014 · 300 sq. Jul 5, 2024 · STC. On the other hand, the resilient channel/OSB modification provides significant increase in at all frequencies except those below 200 Hz. 10. STC Rating (Sound Transmission Class) Deficiencies (Sum Feb 6, 2019 · STC. Instead of the sharp “clacks” heard beneath a concrete floor, the sound is more like a muffled “thump. The first panel is a manufactured-wood acoustic panel with multiple lignocellulosic material-based layers, wherein one or more of the layers having a noise-reducing polymer integrally coating or permeating the Aug 8, 2016 · Resilient Channel only improves the STC rating by providing that decoupling layer, so the flimsy, ungrounded flexibility is critical for its performance. C. It can be used in floor, wall, and ceiling construction to mitigate sound movement, improving the STC Instructions. These ratings, however Jan 2, 2016 · I don’t know where you got the idea that OSB absorbs sound more than drywall. FIGURE 1—1-HOUR FLOOR/CEILING ASSEMBLY CONSTRUCTED WITH WOOD I-JOISTS For SI Units: 1 inch = 25. Oct 28, 2024 · plywood or OSB subfloors can also help provide the fire and sound ratings you need for your build without the need for gypsum concrete. Ohio Administrative Code Rule 4101:5-3-01 Accepted Engineering Practice and Approved Standards effective January 1, 2018 Original document Jun 30, 2009 · or OSB subfloor changes the sound made by the hammers of the tapping machine. Deciding on Resilient Channel vs. Rolls. It assesses how much a material can reduce airborne noise. 23. 35 mm) thickness can help address overall floor thickness limitations and building code sound requirements, making it ideal for multifamily wood frame construction. Formance SIPs are ok in the weather for up to 4 weeks typically before being wrapped. Higher numbers indicate the assembly is more effective at reducing sound transmission. STC rating represents airborne noise such as music or voice; IIC Feb 17, 2016 · Roberts Super Felt Premium Underlayment. Revit PDF. NGC 5006002 Floor STC 55 NGC 7006003 : Floor IIC / L. rockwool. 7 mm] Sheetrock® Ultralight Gypsum Panel. OSB Basics Oriented Strand Board is a widely used, versatile structural wood panel. STC ratings for floors with 38- x 235-mm wood joists (406 mm o. Constructing a new house, means you could use a batt or spray foam. 25 in. (2). - as barriers to airborne sound. This rating system applies only to airborne sound, i. Another way to measure the wall’s STC is to not transmit airborne sound. (2) and Note A-9. 39/1. ATS Acoustic Panel are 2’x4’ and 2-inches thick. 27 0. But if I were considering that, I would put a layer of QuietRock on the existing sheathing first to add soundproofing mass, then sheathing 4 days ago · b) construction providing an STC rating of not less than 43, or c) a separating assembly and adjoining constructions, which together provide an ASTC rating of not less than 40. 6 days ago · The OSB skins act as the flange of the I-beam, while the rigid foam core provides the web. Based on experience, the STC values are very close to those obtained for the assembly under current methods at 16 frequencies. 3048 m, 1 pound = 4. Versatile Panel with Consistent Quality. Resilient clips are best used when you need to decouple a wall or ceiling to decrease sound transfer or impact noise. Nov 15, 2024 · STC ratings indicate how well walls, floors, and doors block sound. 300 sq. Solid core doors with jamb seals and sweeps Apr 28, 2017 · 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: 4 days ago · Common Assemblies STC/IIC Ratings. Nov 7, 2016 · Remember that STC ratings are not the only determinant when deciding how to design a wall. It is also a very durable material, being the mainstream sheathing and flooring product used widely throughout the rest of the world. 6, Exception 4. Measure the sound in the adjacent room: Then, go to the adjacent room and take a second recording of the number Apr 14, 2022 · To review – there are a few different weight and thickness options for mass loaded vinyl, and each type has a different STC rating. 1/8” finish coat 45 34 M9896. 9 2 layers 58 13-mm plywood 15. VOC's and Formaldehydes are < 5% of the Green Building Standard (0. By incorporating one brand of resilient channels in a particular wall assembly design and testing it against another brand installed Nov 15, 2020 · Allows for standard OSB design values, while FRT plywood must take deductions Sound Transmission Class (STC) rating of 61 INTERIOR LOAD-BEARING WALL – UL DESIGN NO. Our wall assembly was comprised of 5/8” OSB (exterior), one layer of type X gypsum wallboard (interior), 2” x 4” studs with 3 inches of Tiger Foam Low Density Spray Foam The NRC is a single number index for rating how absorptive a material is. 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 pretty Nov 15, 2021 · STC values are further improved by using Johns Manville sound control batts to increase sound absorption within the floor/ceiling assembly. joists. 3/4" T&G is glued and nailed. It is 3mm thick and comes in either 100 sq. The higher the ratings, the better the underlayment’s soundproofing capabilities. That is a good thing right? Well, not so fast. STC RATING (ASTM E90) 57-603 IIC RATING (ASTM E492) 50-563 Mold Resistance6 (ASTM G21) 0 Mold Growth Observed Samples received an average growth rating of 0 meaning performance, the selection of a floor/ceiling system attaining a minimum 60 STC and IIC is recommended. Jul 7, 2020 · A single number rating for describing sound transmission loss of a wall or partition Rates a wall partition’s overall ability to resist the passage of airborne sound at 16 frequencies between 125 Hz and 4,000 Hz The higher the STC rating of a partition, the greater ability of the partition to reduce transmission of airborne sound Oct 19, 2022 · STC rates the effectiveness of building components - walls, floors, windows, doors etc. Nevertheless, the STC and IIC rating systems are advantageous from a building code / regulatory perspective because they provide a single-number rating that roughly correlates with subjective impressions of airborne sound transmission from sources such as human voices, radio and television, and structure-borne sound Sep 17, 2020 · board (OSB) panel with a fire-resistant Pyrotite® treatment covering one or both sides. Iso-Step Common Commercial Assemblies: Finished Floor: Underlayment: Base Assembly: Ceiling: Total Assembly STC/IIC: STC/IIC: Ceramic Tile: 2mm Iso Apr 7, 2017 · Each manufacturer of open cell spray foam has a different STC rating. Commonly square edge, but may be produced with tongue and groove edges. Cheap, easy and DIY ways to stop and prevent door slams with products like Hushbumps and special types of self adhesive weather strips. These wall assembly files are used for planning and estimation purposes for many UL wall types, such as fire-rated wall assemblies. The sound isolation between adjacent dwellings in multi-family buildings is often much less than would be expected from the STC rating of the nominally-separating wall or floor, due to structure LP offers Structural I OSB sheathing panels designed for use in roof, wall and subfloor. Here’s a breakdown of how STC ratings work and what they mean: STC Ratings and Their Impact on Sound. The Noise Reduction Coefficient (NRC), which measures how well a room absorbs sound, is an essential consideration for ensuring a balanced acoustic environment that meets both aesthetic and functional needs. Download the Acoustics Overview and sound assemblies to learn more. 2a) • 2021 IRC Section 302. -D present generic options for the design and construction of junctions between Jan 18, 2021 · The higher the STC rating, the higher the airborne sound insulation of the wall. However, OSB has a much broader range of applications. Lay down second layer of 1/2-inch thick plywood or OSB Feb 27, 2023 · 2) MLV and Green Glue Increase Your Walls STC. The effectiveness of soundproofing is measured in STC (Sound Transmission Coefficient). Table 1: STC & IIC Ratings for I-Joist Assemblies with Gypcrete Topping & Resilient Interlayer . 2 days ago · Wall Assemblies. When working with Compound, avoid using the following materials: increasing the STC rating up to 16 points and significantly reducing sound transfer between two 2 days ago · Architects and contractors design and build assemblies that reduce sound transmission between spaces in commercial and multifamily buildings. com or pourlevelrock. The Maxxon floor underlayments and Acousti-Mat® are but single components of an effective sound control system. Again, there is a fairly smooth transmission from frequency to frequency. It’s just one of many features that are now standard in innovative wall assemblies like the UL U350B interior load-bearing wall assembly featuring LP FlameBlock Fire-Rated oriented strand board (OSB May 22, 2022 · STC Rating: The clips can improve the STC rating by 15 points, depending on the construction materials and techniques applied. This added benefit of +3 3/8"OSB +4 1/2"OSB +5 5/8"OSB +8 3 1/2"Cellulose insulation +14 51/2"Cellulose insulation +3 Resilient Channel General guidelines for controlling Where bracing material, such as diagonal lumber or plywood, OSB, gypsum board or fibreboard sheathing is installed on the inner face of one row of studs in double stud assemblies, the STC rating will be reduced by 3 for any assemblies containing absorptive material in both rows of studs or in the row of studs opposite to that to which the OSB panels are available in 4 foot nominal widths and 8, 9, or 10 foot lengths. the sound from sources like voices, TV sets, stereos etc. onsite. Visit UL U336 on the UL website. May 4, 2021 · • Higher load/span ratings than FRT plywood at same thickness • Available in a range of thickness categories, including 7/16˝ to provide consistency with 7/16˝ standard OSB where applicable • Certified Exposure 1 weather resistance • Reduces labor costs and construction time compared to gypsum-over-wood structural panel option May 22, 2022 · Green Glue Compound can be applied in new builds and renovations between layers of drywall, OSB, or plywood. B. Note that for noise levels above 75 dB DNL, either HUD (for May 19, 2023 · This article will explore the six variables that affect STC ratings in walls. OSB conforming to the Canadian standard CSA O325 or the US APA Standard may be used for subfloors, roofs, and wall sheathing in accordance with end uses and spans shown on the panel mark. The STC rating of your exterior wall will vary somewhere between STC 35 to 45 depending on the exterior finish with an OITC rating of approximately 35. ), 152-mm glass-fibre batts in the cavity, uniformly spaced resilient channels The STC rating figure represents approximately the decibel reduction in noise that the assembly can provide. Doors. It is fabricated from selected wood and assembled using finger-jointed technology. If you don’t see the STC Rated Wall Assembly you need below, contact one of our acoustical engineers with the desired Assembly and Target STC Rating Nov 20, 2024 · Fire Resistance Ratings - ANSI/UL 263 Unrestrained Assembly Rating — 1 Hour Where noted with an “*” in the description below, the product must bear the UL Classification Mark. Air Sealant. Decouple wall or ceiling members. 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. 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