Glass stc rating calculator free. Actual values may vary due to production tolerances.
- Glass stc rating calculator free Argon fill is 90% and air fill is 100%. 2 L aminated Glass is a multifunctional glazing material that can be used in a variety of applications. Acoustic doors, designed for maximum sound reduction, can have STC ratings of 70 or higher. The STC rating of a CMU wall can be estimated based on its weight using the following formula: STC = 0. The higher the STC rating, the more sound will be dampened. Building Insulation. Feb 18, 2022 · 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. A sound reduction of 35 decibels is very high. If we assume that a branch of the United States Government, The University of Minnesota, The Minnesota Housing Authority, prominent acoustical engineers and several manufacturers of acoustical products are correct, a change of “1 STC” is equivalent to a change in loudness of “1 dB”. 030" PVB Laminated architectural glass can be fabricated using various glass types, including low-e, clear, low-iron, tinted, reflective, patterned or wired glass to achieve desired aesthetics or to improve solar control and thermal performance. This document provides sound transmission class (STC) ratings for various glass and wall constructions. Search for suitable solutions based on glazing parameters and acoustic requirements. Address: 6301 N Florida Ave Tampa, FL 33604 Sound Transmission Class (STC) Calculator Sound Transmission Class (STC) Calculator Select Wall Type: Wood Stud WallConcrete Block WallBrick WallDrywall Partition Wall Thickness (inches): Calculate STC Rating The higher the STC or OITC rating means the higher the sound attenuation properties of the window. Care & Maintenance; Windows 101; STC Rating (Text size: large-style 3 with dividers) Artisan Series STC Ratings. The test results are available upon request. Laminated & Double-Glaze Combinations. concrete, glass, steel) using graphical computation method based on the material thickness, density, and critical frequency values. 24 Page 1 of 7 E413-87 in an ac oust ical wall. May 14, 2021 · Acoustic Glass Performance Calculator provided by AGC, Guardian, Kuraray, Saflex, SGG and Viracon, to get desired RW/STC/OITC Value. Double-Glazed The definitions of two ratings: Sound Transmission Class or STC and Outdoor-Indoor Transmission Class or OITC; The project’s design requirements and how they impact the glazing system, and; How to calculate an STC or OITC rating; STC versus OITC. Lower Range Up to STC 35. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 1/8" glass, . Actual values may vary due to production tolerances. 85 NRC . Of course, the higher the STC rating, the better. When planning glass wall systems, here’s a Jan 20, 2022 · What Is an STC Rating? The STC rating for walls refers to the “sound transmission class” of your foundation. STC 65 Double 2" x 4" (51 mm x 102 mm) wood studs 16" OC (406 mm): double layer 1/ 2" (13 mm) Type X gypsum board each side; one thickness 35/ 8" (92 mm) JM Formaldehyde-free thermal/acoustical fiber glass batts. Beyond the type of windows you select, other factors can affect the STC rating of your glass. Users will need to satisfy themselves that the results are reasonable for their purposes. Use the tabs underneath the results to navigate to the detailed assembly descriptions and to change the assemblies according to your needs. ) based on its ability to reduce sound coming through it. Check with your framing system supplier for total window values. No frames are utilized in the testing to ensure accurate comparison of the glass configuration can be made without external *70% recycled content is based on the average recycled glass content in all Owens Corning fiberglass batts, rolls and unbonded loosefill insulation manufactured in Canada. That’s where the STC rating comes into play. Factors That Affect Your Glass STC Rating. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing Mar 3, 2023 · To find out the best windows and their glass STC rating chart, contact the best window company in Toronto such as Vinyl Light. com Conclusion: A person cannot detect a change in loudness of +/- 1 dB (STC). An STC rating is an instrument measurement of how much noise is stopped. 2 Tested using GED’s Intercept® ultra low-conductance warm-edge spacer system. In addition, proper installation is critical to ensure that sound does not enter through poorly fitted components. • All values shown are glass only. STC rating goes from 25 – 65. After sealed IG units were installed into the laboratory test opening, the first glass panel and wood spacers were used to complete the triple glass configurations. FLOAT GLASS The STC rating of a single laminated glass n n 5/2011 S. Sound transmission class (STC) and Impact insulation class results are given as well as the following detail data at ⅓ octave band center frequency ranging from 125 Hz to 4000 Hz: TL / STC: Floor Layer Estimated Transmission Loss Structural rating tool. The STC and ISO RW values indicate the acoustical performance ratings, with higher numbers indicating better sound Jul 9, 2018 · The calculator is free to architects and engineers and gives them the ability to compare a variety of glazing components and technologies to determine optimal glazing configurations to meet specific acoustic performance targets. Data applies to double-paned insulating glass units using double-strength glass with an 11∕16″ air space, except patio door with a ¾” air space. † Based on Stats Canada Report CS44-004-IN, April 2013 Oct 20, 2024 · The higher the STC rating, the better the sound insulation. The performance data below applies to an insulating unit constructed with two plies of glass and an air or argon filled space. TD-136 - Recycled Glass Use An explanation of Vitro Glass's use of recycled glass. com. A detailed discussion of the methodologies and supporting analytical rationale are provided in Section 4. † Based on Stats Canada Report CS44-004-IN, April 2013 Oct 10, 2024 · If the window has an STC rating of 30, the final STC with the addition of the blanket is not 65. Resilient channel can improve the STC rating of an assembly. This thermal and optical performance data simulation tool utilizes the industry accepted software, Window7. Insulation will noticeably improve the STC rating of an assembly. B. UPDATED; TD-138 - Heat Treated Glass for Architectural Class (STC) rating. What Is a Good STC Rating for Windows? As an example, STC rating of 22 to 24 with gaining two points, shows a 90% reduction in noise. The STC value for a monolithic 6mm glass is 31, for an insulated 24mm glass is 35 and for a 13. As previously explained, this means they have been tested in a laboratory for their sound transmission loss. Mecart’s standard acoustic products are labelled STC-35, STC-45 and STC-52. The method of measuring the sound transmission class (STC) is defined by the ASTM E413-87 standard. Mid Range STC 36 - 42. • Glass STC ratings up to 46 STC • Solid STC ratings up to 48 STC • NRC ratings up to . The order of sound insulation performance from poor to excellent is: monolithic glass < laminated glass How to calculate the glass STC? One of the features of glass is sound proof,whether it's single glazing, laminated glass,insulated glass or even laminated ins Dec 22, 2022 · Double-glazed glass can also provide an STC rating of up to 40. Laminating glass is a popular way to increase an STC rating. In this case select a value which is 3-4 Rw points above required total window value for Glass 3 Spacer STC OITC Test Date Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Tuscany I V400 updated 09. Ther Rw is more common in Europe, when STC is more common in USA. It is measured in decibels (dB) and is calculated using the following formula: STL = STC - 10 log10(f / 1000), where f is the frequency of the sound in Hz. glass options • 6mm framed glass only • Tempered and Laminated • Clear, Frosted finishes. txt) or read online for free. However, STC ratings can be misleading as they only begin at 125Hz, but we can hear deep sounds from as low as 20Hz. 11F P. STC ratings are calculated by a weighted average of Transmission Loss (TL: a door’s ability to reduce noise) values taken over 16 frequencies, which are fitted to a curve in a method defined by the ASTM E413 Classification Standard for Rating Sound Insulation. Both STC and OITC ratings inform your window or door selection based on sound insulation STC ratings allow to accurately compare noise reduction capabilities by using a single value for the acoustical performance of a door. STC is not a direct measure of how many decibels of sound a wall can stop. STC ratings are the ONLY way to accurately compare various noise reduction products. The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. E413-87 in an acoustica l wall. On the Mar 21, 2024 · Air Pocket Between Glass Panes: The distance between the two panes of glass in double-glazed units affects STC. Jul 9, 2018 · The calculator is free to architects and engineers and gives them the ability to compare a variety of glazing components and technologies to determine optimal glazing configurations to meet specific acoustic performance targets. This value represents your STC rating. Solid Glazed Wall STC Rating 3/8" Clear Tempered Glass 36 1/2" Clear Tempered Glass 38 Double Glazed STC Ratings Muraflex Double Glazed solid walls scored industry standards: Solid Double Glazed Wall STC Rating FINO 3/8" Tempered Glass & 1/2" Laminated Glass 43-46 MIMO 3/8" Tempered Glass & 1/2" Laminated Glass 43-46 Glazed Assemblies STC Ratings. [ ] Review and Interpret Results: Analyze the STC rating to ensure it meets your soundproofing needs. It is manufactured by permanently bonding two or more lites of glass with layers of polyvinyl butyral (PVB) interlayer, under heat and pressure, to create a single construction. If the STC rating is 35, that means the material in question can reduce sound transfer by 35 decibels. JM Formaldehyde-free thermal/acoustical fiber glass batts. 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 Dec 30, 2022 · For instance, if you recorded 16 different frequencies, divide your total by 16. Seals and Gasketing: Even the highest-rated door will perform poorly without effective Jun 16, 2023 · Both achieve an STC rating of 40, but higher ratings require a combination. Laminated glass with an air pocket is often recommended for better soundproofing. Read more about the tools below A large amount of glazing configurations means the perfect glass can be yours. If a wall has a rating of 35, it does not mean that the wall stops 35dB of sound. Of course, the rating is determined as an average based on the different frequencies between 125 Hz to 4000 Hz. How to Increase Window STC Rating. g. The test summary search tool provides structural ratings, documents to support the submittals, determine sizes for design concepts for future buildings. Performance targets are selected based on acoustic ratings, and results are revealed immediately. fire-resistance ratings for veneer and conventional systems –Can minimize or eliminate irregularities such as ridging, boarding and nail pops associated with standard drywall 1/4” (6mm) monolithic glass has an STC rating of 31 1/8” x . A higher STC value indicates better insulation. GLASS TYPE What Are STC Ratings?Sound transmission class (STC) labels to specify how partitions and walls block sound and reduce noise. STC ratings are used for windows doors, walls & most building materials. Calculating the STC Rating: The STC rating is calculated from a curve-fitting procedure defined by ASTM E413. Call: (360) 334-4107 Sep 17, 2018 · What we mean when we say STC-35, STC-45 and STC-52. Not all walls are the same, especially in terms of composition and material. STC 64 Double 2" x 4" (51 mm x 102 mm) wood studs 16" OC (406 mm): double layer / " (13 mm How much of a difference does a change in ratings make? Higher STC ratings mean better sound control. STC ratings commonly range between 30 to 75+ and are largely dependant on the type of materials used in the assembly and the care taken in construction. † Based on Stats Canada Report CS44-004-IN, April 2013 Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. All data presented is for glass-only testing. Factors Affecting the STC Level on Site. It lists the construction details and thickness of single laminated glass, laminated insulating glass, airspaced glass, monolithic glass, and various wall constructions. 6. Location 6601 NE 112th Court Vancouver, WA 98662. 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. Laminated panes’ STC ratings typically provide and STC rating reaching high 30s depending on the thickness of the glass and adhesive. To get started, input your required performance data below. 29W b D3s trcQ C6 MKETIG@ than glass, including the framing, the glazing gaskets/sealants, insulating glass unit spacer and sealants, and possibly interlayers. It’s important also to consider: Glass thickness: thicker glass typically provides better sound insulation than does thinner glass [ ] Calculate the STC Rating: Let the calculator process the data and compute the STC rating. An example of a window STC rating chart is as follows: 26-28 – single pane window; 26-32 – double pane window; 48-54 – soundproof window over a single pane window The difference in sound levels is used to calculate the STC rating. *OITC is estimate d base d on this test. Email: info@commercial-acoustics. The order of sound insulation The Sound Transmission Class (STC) is a whole-number rating of how soundproof a door or window is. The Natio A leader in tools for the glass industry. The STC rating system looks at the amount of noise mitigation provided by the assembly over a broad range of frequencies and a single number is calculated as its rating. Compare the performance of the window frame, the fi nal STC rating of the window assembly could have no infl uence to a 3-point drop in STC ratings from the base glass STC rating. Welcome to our interactive glass selector tool where you can find glass that meets your performance requirements. STC rating (Sound Transmission Class rating) is a score given to a building’s surface (wall, ceiling, window, etc. A leader in tools for the glass industry. Laminated and double-glazed glass both hold STC ratings of 40, but anything higher typically requires a combination of the two. Adding additional layers of drywall can improve the STC rating of an assembly. 030 x 1/8” laminated has an STC rating of 34 1” insulated glass ¼” x ½” AS x ¼” has an STC rating of 35 Structural Performance The strength of laminated glass is determined by the glass thickness, type of vinyl, glass size, and the nature of loading. Technical Glass Guide Update 6/15/21 – Version 3. Glass size and glazing system will affect STC rating. Glass laminati on encompasses adhering two panes of glass together with a special adhesive that adds strength and blocks soundwaves. • The higher the Rw value the better the acoustic performance. Glass siz e and glazing system will a˜ect STC rating. thermal/acoustical fiber glass batts. While STC and OITC ratings are published for various glass configurations, accurate ratings for the STC. Address: 6301 N Florida Ave Tampa, FL 33604 May 22, 2022 · Commonly called acoustic laminated insulated glass, the windows provide an STC of 39 to 54 or greater. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. STC Rating Documents. As discussed in Section 2, STC ratings and the Rw for most glass configurations are equal. Source: STCratings. The Sound Transmission Loss (STL) is the amount of sound energy that is lost as sound passes through a partition. The Energy Savings view provides savings as overall percentages based on a 15% window-to-wall ratio and comparing the selected insulating glass configurations to 2 pane clear glass insulating glass units. Feb 19, 2024 · How is the STC Rating Determined? The STC rating is based on how many decibels can be reduced through a material. May 30, 2024 · STC is a widely recognized measure for sound insulation in windows and doors, focusing on human speech frequencies. 060 P. STC 43* 15/ 8" (41 mm) steel studs: single layer 5/ 8" (16 mm) Type X gypsum board each side; one thickness 23/ 4" (70 mm) JM Formaldehyde-free thermal/acoustical fiber glass batts. Consider not only the STC rating but also door quality and construction. Jul 5, 2023 · Thinner glass has a low STC rating because sound travels through it easily. See additional notes below data for specific Discusses the acoustical properties of glass, methods of rating, such as STC and OITC, applicable standards and the relationship between glass and other glazing components in determining an overall rating. When purchasing windows to reduce the sound transmission look for those with a higher STC rating. Read more about the tools below –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. to provide conservative estimates of required STC or Rw ratings to be used by the building designer as a planning tool for window glazing. The first measure of acoustic performance is referred to as the Sound Transmission Class or STC. . 1. There are different ways to improve the STC rating of windows. V. The method of measuring the Rw coefficient is defined by the ISO 10140-1: 2016 standard. The cost, however, may be prohibitive. Typical dual glazed windows can achieve better ratings of 25-27. 9 mm) 1/2" 0. Sep 30, 2010 · This calculator determines Sound Transmission Class of monolithic materials (e. You would have to do more serious calculations to find the right answer, or test the blanket + window assembly, but essentially you just need to know these two things: The STC rating of a soundproofing product is the rating of the product alone. Understanding STC Ratings for Drywall. However, soundproof windows can have an STC rating of 48-54 or higher Data is based on testing ~36″ x 84″ glass to ASTM E413-87 in an acoustical wall. It’s important to For simplification, we have segmented NanaWall sound-rated opening glass wall solutions into three categories. Ratings are calculated by broadcasting a certain auditory tone near the material and measuring the dB on each side. pdf), Text File (. electrics • Power and Data capability • Hard-Wired and Modular connections. Window STC Rating Chart. *OITC is estimated based on this test. Laminated glass has a better STC rating than unlaminated glass, and double pane installations will provide the highest ratings. The STC (Sound Transmission Class) rating is a single-num ber rating system for interio r build ing partitions and viewin g windows used to catego rize acoustic performanc e. At this rating, you may be able to hear very loud sounds faintly, but most sounds you won’t hear at all. You can’t add STC ratings together. 8 operated by Lawrence Berkeley National Laboratory (LBNL) using International Glazing Database (IGDB) v102. To determine the specifi c STC ratings of glass and a window or door assembly, the following ASTM standards should be used: • ASTM E 90 - 90 Standard Test Method for insulating glass units. High Range STC 43 - 45. STC How to Calculate the Glass STC - Free download as PDF File (. This performance data is not a commitment for Cardinal to produce. A typical STC rating chart will often include an example of materials with a given STC rating, and the sounds you can expect to hear given the STC rating. Jun 15, 2024 · STC Ratings for Windows and Glass. Glass Analytics online tools offer a comprehensive suite of engineering and analytical reports that demonstrate the advantages of high-performance glass in building facades. Glass size and glazing system will affect STC rating. Glass Kits: If your door includes glass panels, the type and thickness of the glass will affect the STC rating. A window with an STC rating of 34 can reduce exterior noise by 43%, bringing many loud outdoor noises down to a comfortable level, which is typically rated around 60 decibels. A small change in the STC rating can make a big difference. Costing more than other materials, this is used mainly for exterior applications. Glass Performance Calculator . For windows, STC ratings range from 18 to 38. Understanding STC ratings for drywall can be complex. Implementation of the appropriate rating system is important because OITC and STC ratings are not linearly related, and the achievement of a strong STC rating does not necessarily correlate with a similar OITC rating. High STC rated windows are designed to minimize sound transmission by incorporating multiple layers of glass, specialized framing, and insulating materials that reduce noise from the outside. OITC, on the other hand, covers a broader frequency range (80 to 4000 Hz), including lower frequencies often associated with external noise. Laboratory testing is used to measure the resistance of partitions such as walls, windows, or entry doors to the passage of sound. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. Nov 25, 2022 · A four-point STC improvement can cause a clearly perceptible change in your home’s acoustics, while a 10-point improvement can reduce sound by 50 percent. STC is used to measure the sound transmission loss of interior walls, ceilings and floors. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. 0 This guide provides an introductory overview of glass concepts and terminology, plus A higher STC rating translates into more reduction in sound. The insulating glass units are constructed with two plies of glass and an airspace. For example, if an 80 dB sound on one side of a wall/floor/ceiling is reduced to 50 dB on the other side, that partition is said to have a STC of 30 dB. The attached STC and OITC data is for glass only and that the final STC rating of the window assembly could vary because of the influence of the acoustical performance of the framing members and the construction of the window assembly. Read more about the tools below Insulation Calculator. STC 50* 15/ 8" (41 mm) steel studs: double layer 1/ 2" (13 mm) Type X gypsum board each side; one The Strength Lab AI-Tool is believed to give adequate estimates of acoustic properties of laminated glass based upon best engineering judgment and practices, but NO claims are made as to the accuracy of the results obtained. Sound Transmission Class ratings. Both Rw and STC describe the insulation against typical air noise. The estimate could easily be off by as much as +/- 4 dB. This rating is based on how much sound is blocked across a range of frequencies, usually from 125 Hz to 4,000 Hz. QINGDAOMORNBUILDINGMATERIALSCO. Our glazed partitioning systems are tested at a certified laboratory to ensure reliable STC ratings. 1/4" 41 41 SoundPro calculates glass usage by performance or glazing configuration. 52mm laminated glass is 39. Jul 31, 2022 · Glass doors can range from 28 to 60+ STC ratings, while steel and fiberglass doors range from 20 to 50. 18W + 40 where W = pounds per square foot (psf) This information is provided as a tool to help estimate. STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Glass 1 3/4" (19. Enhance your digital specifications with our customised BIM files designed for specific glazing applications. Understanding STC This calculator makes it easy for you to perform preliminary assessments of the Wind Load resistance of single glazed, annealed (not heat treated) window glass, with various edge support conditions, according to the ASTM E 1300 standard. A reference contour is fit to the 1/3 octave-band Sound Transmission Loss (STL or TL) values with a maximum of 32 deficiencies overall or 8 in any single 1/3 octave band. 7 %µµµµ 1 0 obj >/Metadata 422 0 R/ViewerPreferences 423 0 R>> endobj 2 0 obj > endobj 3 0 obj >/ExtGState >/XObject >/ProcSet[/PDF/Text/ImageB/ImageC Windows significantly impact Sound Transmission Class (STC) ratings because they can either enhance or diminish the overall sound insulation of a building. * Mar 22, 2024 · Understanding the STC rating of glass is crucial for architects, builders, and designers when selecting glass products for projects where sound insulation is a priority. *70% recycled content is based on the average recycled glass content in all Owens Corning fiberglass batts, rolls and unbonded loosefill insulation manufactured in Canada. Navigator test numbers can be used to access the appropriate documents. Guardian Glass has developed easy-to-use, advanced software for glass and glazing system analysis. integration • Drywall/base building • Optos, Focus and Tek Vue Mar 6, 2018 · Phone: 888-815-9691. Acoustical Guide – Determining Minimum STC Rating Figure 1. Your go-to portal for discovering the perfect glazing solutions, tailored to your requirements. In general, it is believed that a higher STC rating is preferable. For instance, in residential buildings located in noisy urban environments, selecting glass with a higher STC rating can significantly improve occupant comfort by reducing *70% recycled content is based on the average recycled glass content in all Owens Corning fiberglass batts, rolls and unbonded loosefill insulation manufactured in Canada. Typically the material with the lowest resistance to the passage of sound has the greatest impact on a partition's STC value. What Is a Good STC Rating? An excellent rating is an STC of 60 or higher. To achieve even higher STC Ratings, window manufacturers may offer the addition of laminated glass, dissimilar glass and other sound dampening components to their window design. STC ratings provide valuable information for homeowners by offering them better insight into the The ASTC rating of the complete building system and the STC and Flanking STC ratings of the separating and flanking assemblies are displayed at the top of the page. File type Values are center of glass calculated using LBNL Window 7 per NFRC100 conditions. Glass Options; Doors; Career; Support. The STC ratings allow accurate 'apple to apple' comparisons. Mass pigmented and decorative interlayers can also be used to provide a wide range of effects. A rating of 40 would likewise correlate with a volume reduction to approximately 1/16th of the original level (1/2)^4 = 1/16). 5. Laminated Glass Applications Phone: 888-815-9691. Limited Warranty Submittal Form JM Unfaced Formaldehyde-Free Fiberglass Insulation HPD 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. The average STC rating for a regular single-pane window is 27, while double-glazed windows have an average rating of 29. One of the features of glass is sound proof,whether it’s single glazing, laminated glass,insulated glass or even laminated insulated,the glass can reduce the sounds transferrd from outdoor to indoor. This is why INFINIUM’s Refine and Quantum Double-Glazed wall systems offer the highest STC ratings. Drywall between double studs can dramatically reduce the STC rating of an assembly. Generally, yes. Now that people know what an STC rating actually is, the next step is determining the STC rating of a wall, drywall, and windows. For instance, if you have an STC of 40 on one wall and decide to add another wall with an STC of 20, the STC of both walls combined will not be 60. Although it is commonly used in the United States and is the most widely used measurement of sound reduction, STC has various limitations that prevent it from being comprehensively reliable in determining actual soundproofing expectations. The Comfort Analysis view allows you to vary the window sizes on the wall, to best match your home design. %PDF-1. ,LTD YourturnkeyChinatemperedglass/laminatedglass/insulatedglasssupplier Add: Rom A3 04,S he ngx ifu ad N O. If you are unsure of what rating would work for your project, there are some standards you can go by in helping you to determine your target range. STC ratings are used for windows, doors, walls and most building materials. Using large, dramatic panels of glass is one of today’s most popular design trends. • As a guide when frames are included, the Rw values shown will decline. Dec 31, 2024 · Gaps or weaknesses in the frame can compromise the STC rating. 03. A wider gap provides better sound insulation by minimizing direct sound transmission. 030" PVB, 1/8" glass, 1/2" airspace, 1/8" glass, . This rating will give you an idea of how effective your chosen materials or construction methods are at reducing sound transmission. Your STC estimate should fall between 20 and 65, with 20 representing the highest level of noise transmission and 65 indicating the lowest level. efrwfz sotopt gaek tjfni gzswfi jezu zuzj nrwjv jmkiw iexo znwc ywgrmp qaiyg vyxig eikcmf