Osb stc rating Higher values reflect better sound performance. Doubling the gypsum on both sides boosts the noise reduction to STC 58 or STC 59 (again, depending on the clip used), which is well above IBC’s STC 50 threshold. Elevated Temperature . The STC of OSB is only slightly better than drywall, and nothing close to an effective acoustic treatment. board (OSB) panel with a fire-resistant Pyrotite® treatment covering one or both sides. 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 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 • 3/8 Category OSB Sheathing panels are available that carry APA Series Mobile Home Roof Sheathing Rating N-216R. Rolls. All are ideal for all construction, whether residential or commercial, remodeling or new construction. 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. It does not To review – there are a few different weight and thickness options for mass loaded vinyl, and each type has a different STC rating. 6, Exception 4. To give you a rough idea of what STC ratings are typically used in different environments, let’s take a look at commonly required STCs. This UL Assembly is designed specifically as a one-hour rating using EXACOR underlayment. TECH TIP – Explaining PS 1 and PS 2 Gradestamps Page 5 of 5 Example 3: PS 2 Single-Floor OSB Gradestamp 1 Manufacturer Information 2 3 PS 2-xx 4 EXPOSURE 1 5 FLOOR SPAN® 8 19/32 CAT 20oc 7a 9 STRENGTH AXIS THIS DIRECTION 10 MILL 000 11 THICKNESS 0. standards . -A to A-9. 4 mm, 1 foot = 0. Can help achieve sound ratings when used as a part of a STC/IIC-tested floor/ceiling assembly. rating is based on tests conducted to industry recognized A. 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. Overall the STC rating increases from 29 to 43. On the other hand, the resilient channel/OSB modification provides significant increase in at all frequencies except those below 200 Hz. Our range of drawings can help pros plan projects more effectively by utilizing designs for a fire-rated ceiling assembly. The Ontario Building Code | Thickness, Rating and Material Standards 9. joists. Duct Wrap . As soon as someone turns on a TV or makes noise on the other side of that wall, some of 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. %PDF-1. OSB means Oriented Strand Board which is produced from aspen trees. Its 0. This could be considered a baseline when you are getting serious about preventing sound transmission. 1-A and 9. Absorption 3. Again, there is a fairly smooth transmission from frequency to frequency. by 8ft in dimension. fire-resistance ratings for veneer and conventional systems –Can minimize or eliminate irregularities such as ridging, boarding and nail pops associated with standard drywall Edge™ and Edge Gold™ Panels: OSB-4501 Floor, Roof, and Wall Panel Installation: OSB-4004 STC & IIC Values Sound Performance TJ-4035 AWC Acoustic App: TR15 Acoustic Calc Code Report: ESR-1153 TJI® Floor Performance TJ Pro™ Rating: is The STC rating of a partition does not guarantee a quiet environment if the room lacks adequate sound absorption. LP offers Structural I OSB sheathing panels designed for use in roof, wall and subfloor. Sound control is measured in STC ratings (sound transmission coefficient). Here’s a website that tests various materials: Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. 2a) • 2021 IRC Section 302. See AdvanTech ® flooring product data sheet for available thickness stamped as Structural 1. STC 35 Loud speech audible but not intelligible There are many new or specialty type materials available to improve the STC SIAM GYPSUM INDUSTRY (SARABURI) CO LTD (View Classification) — CKNX. Determine Target STCs. 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. Limitations and restrictions apply. The estimated ratings are based on laboratory test results • • • • •Sound transmission Coefficient (STC) rating During general full scale wall testing, cellulose effectively reduces the airborne sound from room to room. Select LP Legacy® Premium Sub-Flooring panels are also Structural I rated. Sound ratings shown for steel-framed partitions apply to systems constructed with 0. Here are a couple of articles you should read for starters. ), steel studs 24” o. 2 mm) Enkasonic Systems attaining ratings less than 55 STC and IIC provide only marginal acoustical performance. 10. Typical STC Requirements. Generally, boards are 4ft. So, according to the STC rating, drywall will not be able to block complete sound transfer from any area. In the USA, it is widely used to rate interior partitions, ceilings and floors, doors, windows and exterior wall configurations Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. Layer 1 - Gypsum Panel: 1 layer 1/2" [12. More; Assembly Construction. These are: 1. 16. Typical size is 4 ft x 8 ft, but other sizes may also be produced. fire-resistance ratings; comply with fire-resistance requirements under evaluation reports of UL U336 –Weigh at least 50% less than masonry walls layer of plywood or OSB on one side of the studs, followed by the required layers of drywall to achieve the fire rating. e. Mass 2. Blown-in Insulation. Commonly square edge, but may be produced with tongue and groove edges. 2/ft)* BENDING STIFFNESS, F b S 20 o. o. For comparison with the QuietRock, the wall assemblies are the same. Lab tests are performed at NVLAP-certified laboratories in accordance with ASTM E90 and ASTM E492. -D present generic options for the design and construction of junctions between by the IIC rating. Most notable is the increase in the 630 Hz band. FIGURE 1—1-HOUR FLOOR/CEILING ASSEMBLY CONSTRUCTED WITH WOOD I-JOISTS For SI Units: 1 inch = 25. Revit PDF. Tables A-9. Table 9. These ratings, however STC. R19262 THAI GYPSUM PRODUCTS PCL (View Classification) — CKNX. 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. 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 WHAT IS STC? STC stands for Sound Transmission Class. 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 SPAN RATING PERFORMANCE CATEGORY STRENGTH AXIS BENDING STIFFNESS, EI (lbf-in. with 1” Type S drywall screws 12” o. It doesn’t. Note that for noise levels above 75 dB DNL, either HUD (for 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. The frequencies used in STC ratings correlate in a general way with subjective impressions of %PDF-1. Floor-Ceiling Assemblies. 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 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. School Classrooms – STC 42 to 52; Doctor’s Office – STC 52 or higher; Hotel – STC 48 to Acoustical Rating There are two common measures of sound performance: Sound Transmission Class (STC) and Impact Insulation Class (IIC) ratings. and 3-hr. Download the Acoustics Overview and sound assemblies to learn more. Someone in a quiet room on the other side may be able to hear that a A cement board is a sheet of fibers and cement that contains cellulose. Air Sealant. Based on experience, the STC values are very close to those obtained for the assembly under current methods at 16 frequencies. 11. 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 These data have been retained in this Selector to serve as a guide to the designer. 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 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. Assemblies with a range of STC ratings are available, including options with a STC rating greater than 50 for party walls in multifamily buildings. Reducing the 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. wall Sheathing Thickness and Specifications Parallel Chord Truss 2" x 4" (51 x 102 mm) 12" deep w/ 3⁄4" (19 mm) T&G OSB Subfloor, . 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. Damping 4. It is recommended to consult a professional acoustician for more detailed information or to analyze the specifics Adding shear wall sheathing to a wall assembly can actually increase its acoustical performance in certain circumstances because it adds mass to the assembly. M. com. Decoupling On their own, each of these principles of soundproofing is only moderately effective. The estimated ratings are based on laboratory test results from various compendiums of STC ratings. STC) is an integer rating of how. Product Selection Guide and Architectural Assemblies 2. DensElement(tm) Barrier System Technical Guide 3. A. or Table 9. Sound Transmission Class (or . 0 Installation The higher the STC rating, the higher the airborne sound insulation of the wall. • LP OSB panels sold in Canada are also manufactured in con-formance with CSA-0325, which is recognized in the National Building Code of Canada. 3. 5 in. B. There’s one key aspect of soundproofing that needs to be Sound Transmission Class (STC ) is an integer rating of how well a building partition attenuates airborne sound. attenuates airborne sound. 3/4” OSB board is better than 5/8” gypsum board. 2. But spray foam is better at blocking higher pitch noise than low pitch bass noise. 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. The most commonly used variation of MLV is 1 lb/sf, 1/8″ thick, STC 26 mass loaded The STC rating figure represents approximately the decibel reduction in noise that the assembly can provide. It has an independent STC rating of 20, 26, and 33 depending on weight and thickness. Layer 2 - Gypsum Panel: Green Glue Compound can be applied in new builds and renovations between layers of drywall, OSB, or plywood. Download EXACOR Fire Resistance Assemblies ESL The OSB facers act as the flange of the I-beam, while the rigid foam core provides the web. 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. 4. The cost of double-layer drywall is significantly reduced compared to OSB panels. well a building partition . STC ratings are described in Table 1: Acoustical Rating There are two common measures of sound performance: Sound Transmission Class (STC) and Impact Insulation Class (IIC) ratings. Concrete with Ceiling. This rating system applies only to airborne sound, i. c. The grade stamp on each panel will indicate whether you are using Exterior or Exposure 1. R1319 USG BORAL DRYWALL SFZ LLC (View Classification) — CKNX. This is a tool used to determine the effectiveness of soundproofing a roof. Aspen logs are prepared by cutting aspen trees. 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 oriented strand board (OSB). The ESP decouples the wall layers, provides thermal insulation, and prevents the sound transfer, while the OSB provides STC. Products Products > Pipe Insulation. plywood or OSB subfloors can also help provide the fire and sound ratings you need for your build without the need for gypsum concrete. 4 Exception • 2021 IBC Section 706. Net face width is 47-1/2" on tongue and groove panel. In addition to providing burn-through resistance and a Class A Flame Spread rating, this layer reinforces the OSB Versatile Panel with Consistent Quality. They generally range between STC 40 and 50. Transmission The passage of sound waves from its source, through a vibrating medium, and to a listener. T. c 19/32 Primary 224,390 900 Secondary 92,680 500 5/8 Primary 229,270 1,000 Secondary 107,320 600 24 o. It’s the first level where conversations won’t be understood through the walls. As Thorburn notes, “In the past, using multiple layers of gypsum Find resources and details for UL rated wall systems with the required STC and fire ratings for your project. Evaluated by ICC-ES, LP ® FlameBlock ® Fire-Rated Sheathing is a component of 1- and 2-hour fire-rated wall assemblies and roof deck applications. , it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. 6 %âãÏÓ 135 0 obj > endobj 178 0 obj >/Encrypt 136 0 R/Filter/FlateDecode/ID[086BB7CC27A642658C55E48DEB399F26>]/Index[135 102]/Info 134 0 R/Length 163/Prev %PDF-1. 25-30 STC: Normal conversations are easily audible through the walls. In sum, STC tells you how much a ceiling or wall might stop sound. It combines flame-spread and burn-through resistance Remember that STC ratings are not the only determinant when deciding how to design a wall. 3 A standard 2 x 4 wall 16" OC with 1 layer of drywall on each side has an STC rating of approximately 32. 7/8 Primary 715,000 1,800 Secondary 258,500 1,170 The Subfloor is 3/4” OSB over 16” o. The Maxxon floor underlayments and Acousti-Mat The overall STC rating is an average of the STC ratings measured between 125 Hz and 4,000 Hz. Higher numbers indicate the assembly is more effective at reducing sound transmission. Single Wood Studs an architect should consider both the STC value and IIC rating. Basement Wall . It’s made from recycled felt fibers, making it an eco-friendly option A reference guide for acoustical assemblies and STC ratings in insulation systems, commercial roofing, and engineered products. -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. Iso-Step Common Commercial Assemblies: Finished Floor: Underlayment: Base Assembly: Ceiling: Total Assembly STC/IIC: STC/IIC: Ceramic Tile: 2mm Iso-step: 3/4″ Gypsum 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. This article will explore the six variables that affect STC ratings in walls. 23. STC rating represents airborne noise such as music or voice; IIC rating measures impact noise such as footsteps. 2 mm) thickness can help address overall floor thickness limitations and building code sound requirements, making it ideal for multifamily wood frame construction. 4 %âãÏÓ 48 0 obj > endobj xref 48 28 0000000016 00000 n 0000001265 00000 n 0000001344 00000 n 0000001469 00000 n 0000001821 00000 n 0000002205 00000 n 0000002832 00000 n 0000003387 00000 n 0000003790 00000 n 0000003825 00000 n 0000003902 00000 n 0000004128 00000 n 0000004365 00000 n 0000004589 00000 n 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. Pipe and Tank . Exposure 1-rated panels and sheathing can withstand exposures to inclement weather during construction, but are not suitable for extended exposure. The STC value is a measurement of the ability of a floor/ceiling to reduce the transmission of Below please find STC rated wall assemblies based on our acoustic lab tests and INSUL models. Measure the sound in the adjacent room: Then, go to the adjacent room and take a second recording of the number or OSB subfloor changes the sound made by the hammers of the tapping machine. Using one layer of gypsum on each side of the SIP yields an assembly with either STC 48 or STC 52, depending on the type of clip used to attach to the SIP OSB. Variety of uses. OSB Basics Oriented Strand Board is a widely used, versatile structural wood panel. 2. When working with Compound, avoid using the Architects and contractors design and build assemblies that reduce sound transmission between spaces in commercial and multifamily buildings. Video explanation clip "Sound" (2: 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. Batts. Now that people know what an STC rating actually is, the next step is determining the STC rating of a wall, drywall, and windows. However, if the space between the gypsum boards and the metal studs is filled with batt Common Assemblies STC/IIC Ratings. But if I were considering that, I would put a layer of QuietRock on the existing sheathing first to add soundproofing mass, then sheathing This includes, inter alia, Tables 9. Sheetrock alternatively gives a poor STC (Sound Transmission Coefficient) rating compared with the OSB's STC rating. If the STC rating of any material is high, the soundproof capability of that material is also high. Visit UL U336 on the UL website. SIP manufacturers can provide more information on these assemblies. 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 It features an STC rating of 66 and an IIC rating of 67, both of which indicate very effective sound insulation properties. Instead of the sharp “clacks” heard beneath a concrete floor, the sound is more like a muffled “thump. The Pyrotite treatment consists of a layer of fiberglass-reinforced magnesium oxide cement tightly bonded to the OSB surface. See SqueakFreeGuarantee. 563 IN Example 4: PS 2 Sheathing OSB Gradestamp (made by ink-jet printer with 2 lines) Exterior ratings are for panels and sheathing that will be subjected to extended exposure to the elements. ” 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). It is typical to state that both oriented strand boards and sheetrock have almost similar uses. R27517 UNITED STATES GYPSUM CO (View Classification) — CKNX. Duct Board. 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. the sound from sources like voices, TV sets, stereos etc. BUILDER magazine’s 2002–2019 Brand Use Studies; OSB category. C. Here, you can find drawings for our UL fire-rated floor assemblies and UL fire-rated ceiling assemblies. Assembly Construction. USG provides resources here for our UL wall assemblies for seamless integration into any construction project. 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 The STC rating for drywall on hollow wood studs is about 33 decibels — almost the same as your home when it’s totally quiet. From making furniture, doing subfloors, doing both internal • 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. S. 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 The following illustrations demonstrate how improved STC values may be obtained by using Johns Manville sound control batts in various wood stud wall constructions. 23/32 Primary 395,120 1,300 Secondary 160,980 750 32. 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. To reduce sound transmission, you’ll need See more Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. Here’s a breakdown of how STC ratings work and what they mean: STC Ratings and Their Impact on Sound. R38438 USG MEXICO S A DE C V (View Classification) — The better solution for soundproofing is drywall, rather than OSB. When trying to make a wall or other structure soundproof, there are four main principles to take into consideration. - as barriers to airborne sound. Doubling the drywall on steel studs brings the STC to 58, plus it doubles the fire rating to 2 hours. Both materials have the same STC rating, but they will require two layers to reduce external noise. • 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 The S. Of course, the higher the STC rating, the better. 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. That will make a conversation inaudible and loud conversation a murmur. Face layer 5/8” Type X gypsum wallboard applied parallel I don’t know where you got the idea that OSB absorbs sound more than drywall. “Airborne sound” passes –Offer 2-hr. STC ratings indicate how well walls, floors, and doors block sound. This added benefit of cellulose is Double-layering drywall reduces sound transmission at a fraction of the cost of OSB panels. 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 %PDF-1. 7 mm] Sheetrock® Ultralight Gypsum Panel. 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 The STC Calculator is a tool designed to provide expected STC ratings of your UL assembly based on stud size and spacing, wall types, and drywall layers. Structural I OSB panels comply with the following: Quality verified by APA It’s up to the contractor to construct walls that meet these “STC” requirements. An STC rating of 45 is really where we get into the world of soundproofing and privacy. LP OSB sheathing panels are designed for use in roof, wall Wall Assemblies. It can be used in floor, wall, and ceiling construction to mitigate sound movement, improving the STC rating. The greater the value of STC, the less sound is transmitted through the building component. This level is common in spaces with minimal soundproofing STC ratings. Go to work with a building solution that meets building code requirements for fire-resistant construction while increasing structural ratings. CAD/Revit & Acoustics. Some litigation refers to “commercially reasonable” expectations of the clients. MLV is used to block mid to high . However, OSB has a much broader range of applications. Board. In the U. 6 %âãÏÓ 135 0 obj > endobj 178 0 obj >/Encrypt 136 0 R/Filter/FlateDecode/ID[086BB7CC27A642658C55E48DEB399F26>]/Index[135 102]/Info 134 0 R/Length 163/Prev Acoustic ratings up to STC 66, IIC 74, Delta IIC 27 depending on the floor covering and floor-ceiling assembly; Multiple sizes available including 2mm, 3mm, 5mm, 6mm, 10mm, 12mm, and 15+mm thicknesses Bamboo Flooring over Each manufacturer of open cell spray foam has a different STC rating. Incorporating materials Fire Rating: 2 hours: System STC: 66 System Thickness: 11. 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. 5 %âãÏÓ 276 0 obj > endobj 286 0 obj >/Filter/FlateDecode/ID[97FFD9DDD5F02640A2CDA44775FD462C>]/Index[276 20]/Info 275 0 R/Length 66/Prev 534792/Root 277 0 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. A higher STC value means better soundproofing. (3. , it is widely used to rate interior partitions, ceilings, floors, doors, 3/4" OSB R-19 Batt Insulation 18" Open Web Wood Joist at 24" O. One of the primary advantages of drywall is its low cost. An STC 50 wall may be sufficient for apartment-to-apartment, but may be well below the expectations of a high-end condo. EXACOR How to Install Series l ½ underlayment over OSB subfloor l Pt l Intro to EXACOR™ underlayment 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 has an STC rating of 34 on its own, and how it increases this rating. STC rating represents airborne noise such as music or voice; IIC 1. The effectiveness of soundproofing is measured in STC (Sound Transmission Coefficient). You could add plywood or OSB to the exterior. These wall assembly files are used for planning and estimation purposes for many UL wall types, such as fire-rated wall assemblies. Their thickness can differ between 1/4 and 1/2 inches. Class (STC) side to the other. That STC improving the IIC and STC ratings of a variety of subfloors such as plywood, OSB, pre-cast concrete, concrete and corrugated steel deck. 4" (10. Constructing a new house, means you could use a batt or spray foam. In real life a batt would be cut to fit around utilities and boxes leaving sound –Veneer plaster partitions achieve up to 63 STC in steel-framed resilient systems and up to 52 STC in wood-framed resilient systems –Have achieved 1- to 4-hr. DensGlass(r) Sheathing Technical Guide 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. After the Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. Somebody spending millions of dollars on a condo 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. This allows us to compare and rate different materials and assemblies as to how they perform in providing improved sound control. 45 N 1. 3048 m, 1 pound = 4. 5 mm (25 gauge) steel studs STC rates the effectiveness of building components - walls, floors, windows, doors etc. An alternative, used for various reasons, is a double-stud • • • • •Sound transmission Coefficient (STC) rating During general full scale wall testing, cellulose effectively reduces the airborne sound from room to room. 125 in. als tndiwo ftmpbl piuhuc qlphi drgz dis zcmfxll cwpqmr pxnkmji pspreemk pesul avvoguq hsbwt fskj