Glass stc rating calculator canada. Jun 15, 2024 · STC Ratings for Windows and Glass.
- Glass stc rating calculator canada Canada. * STC ratings are used for windows, doors, walls and most building materials. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. Laminated and double-glazed glass both hold STC ratings of 40, but anything higher typically requires a combination of the two. Understanding STC Jun 15, 2024 · STC Ratings for Windows and Glass. Feb 19, 2024 · How is the STC Rating Determined? The STC rating is based on how many decibels can be reduced through a material. 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. Phone: 888-815-9691. 5. Lower Range Up to STC 35. From electronic design calculators to practical construction guides, our resources make wood design more accessible and straightforward. There are different ways to improve the STC rating of windows. OITC has replaced STC for comparing glazing materials. It’s important also to consider: Glass thickness: thicker glass typically provides better sound insulation than does thinner glass STC ratings are used for windows, doors, walls and most building materials. 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. Select materials and configurations for accurate results. It is an important factor in ensuring acoustic comfort in buildings. We didn't do that. ,LTD YourturnkeyChinatemperedglass/laminatedglass/insulatedglasssupplier Add: Rom A3 04,S he ngx ifu ad N O. 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. Use the tabs underneath the results to navigate to the detailed assembly descriptions and to change the assemblies according to your needs. For simplification, we have segmented NanaWall sound-rated opening glass wall solutions into three categories. A sound reduction of 35 decibels is very high. Class (STC) rating. Laboratory testing is used to measure the resistance of partitions such as walls, windows, or entry doors to the passage of sound. This rating is given to materials that are tested over a range of frequencies, and are proven to block sound in some capacity. The first measure of acoustic performance is referred to as the Sound Transmission Class or STC. The STC rating is the average amount of noise stopped at 18 different frequencies, measured in decibels. Example:6mm clear tempered glass STC=13. Glass laminati on encompasses adhering two panes of glass together with a special adhesive that adds strength and blocks soundwaves. 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 *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. 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. Acoustical Guide – Determining Minimum STC Rating Figure 1. 2) for laboratory testing or ASTM E413, Standard to provide conservative estimates of required STC or Rw ratings to be used by the building designer as a planning tool for window glazing. Images courtesy National Research Jul 4, 2024 · STC. The STC rating is a crucial measure of how effectively a building partition attenuates airborne sound, making it essential for creating soundproof spaces. Adding additional layers of drywall can improve the STC rating of an assembly. However, soundproof windows can have an STC rating of 48-54 or higher The installed weight of concrete masonry assemblies can be determined in accordance with CMU-TEC-002-23 (ref. May 22, 2022 · And glass in the door lowers the overall STC rating even more. 29W b D3s trcQ C6 MKETIG@ *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. STC is highly dependant on the construction of the partition. VAT Number GB 544 939 018. Glass surfaces are counted from the exterior face of the building. OITC, on the other hand, covers a broader frequency range (80 to 4000 Hz), including lower frequencies often associated with external noise. Mass pigmented and decorative interlayers can also be used to provide a wide range of effects. What Is a Good STC Rating? An excellent rating is an STC of 60 or higher. See additional notes below data for specific 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. This webinar will cover essential topics, including advancements in lateral systems and rod holdowns, and provide a step-by-step approach to accurately Laminating glass is a popular way to increase an STC rating. Glass size and glazing system will affect STC rating. The STC rating of a CMU wall can be estimated based on its weight using the following formula: STC = 0. At this rating, you may be able to hear very loud sounds faintly, but most sounds you won’t hear at all. For example, MLV has an STC rating of around 27. Both STC and OITC ratings inform your window or door selection based on sound insulation insulating glass units. If only one or two types of frequencies are predominant in an area, the overall STC rating might not matter as much. 77 Cardinal's laminated glass offers sound dampening, reducing audio decibel levels in high-noise areas. B. For example, laminated glass has a rating of around 35, but it can go up as far as to 41 if you use thicker layers of glass and PVB. 2. (for more information on STC see ASTM E90 and ASTM E413) OITC - Outdoor-Indoor Transmission Class The OITC rating is calculated in accordance with ASTM E1332. The method of measuring the Rw coefficient is defined by the ISO 10140-1: 2016 standard. 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. *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. However, soundproof windows can have an STC rating of 48-54 or higher Jun 15, 2024 · STC Ratings for Windows and Glass. When STC tests are performed, the TMS 0302 requires the testing to be in accordance with ASTM E90, Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements (ref. 5lg(M1+M2)+13+R1 R:laminated glass STC M1,M2:Glass panel density The National Research Council's (NRC) soundPATHS web application is a prediction tool for the calculation of direct and flanking sound transmission between adjacent rooms. Whether you are designing a new home in Prayagraj or renovating an old one, tempered glass is an excellent choice. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. For instance, in residential buildings located in noisy urban environments, selecting glass with a higher STC rating can significantly improve occupant comfort by reducing Join us for an insightful exploration into the latest developments in wood shearwall systems and connections, featuring critical updates from the 2020 National Building Code of Canada (NBCC). electrics • Power and Data capability • Hard-Wired and Modular connections. In the past, STC was used as a preliminary comparison of various glazing materials. As discussed in Section 2, STC ratings and the Rw for most glass configurations are equal. It is important to note that the above listed glass performance will differ to that of a window assembly using these products. STC 35-45: Loud speech is audible but less intelligible. Laminated & Double-Glaze Combinations. The overall STC rating is an average of the STC ratings measured between 125 Hz and 4,000 Hz. The higher the STC rating, the less noise is passed through the material - in our case, the door opening. Other industry material which also compiles similar information is linked to in the respective sections below (click to jump to fire ratings, and here to jump to STC ratings). To get started, input your required performance data below. Sound Transmission Class (STC) rating. com (blocks 25 – 50 decibels) or a roll-up curtain from residential-acoustics. Registered Office: Saint-Gobain House, East Leake, Loughborough, Leicestershire, LE12 6JU. *OITC is estimated based on this test. STC ratings are the ONLY way to accurately compare various noise reduction products. Oct 20, 2024 · The higher the STC rating, the better the sound insulation. Generally, yes. The table below compares the noise reduction performance of VIG and Hybrid VIG to standard double- and triple- insulated glass units: Mar 5, 2021 · STC stands for sound transmission classification. Explanation Calculation Example: The Sound Transmission Class (STC) rating is a measure of how well a material or assembly blocks sound transmission. Sound Transmission Class ratings. Dec 22, 2022 · Double-glazed glass can also provide an STC rating of up to 40. 6. 85 NRC . The software uses the calculation procedure outlined in the 2015 edition of the National Building Code of Canada. STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Thickness Inside Construction Space Outside STC Value ISO RW 3 Single Laminated Glass 1 1 Jan 20, 2022 · What Is an STC Rating? The STC rating for walls refers to the “sound transmission class” of your foundation. In general, a higher STC rating blocks more noise from transmitting through a partition. One US glass manufacturer who has Much of the source material used for the Simplified Partition Wall Calculator is taken straight from the National Building Code of Canada. Mar 30, 2023 · The National Research Council of Canada conducted research on the importance of sound insulation, and found that an effective STC rating of 55 is recommended, and 60+ is ideal, especially in rooms where there is going to be music related noise. glass options • 6mm framed glass only • Tempered and Laminated • Clear, Frosted finishes. ASSA ABLOY offers hollow metal doors and full acoustical assemblies that are STC-rated. The higher the STC rating, the more sound will be dampened. STC 36: Standard ½” glass (clear tempered) STC 34: Standard 3/8” glass (clear tempered) So go ahead, turn it up (and feel free to invite your cousin to the office). It’s important also to consider: Glass thickness: thicker glass typically provides better sound insulation than does thinner glass Jan 2, 2025 · Buy High-Performance Tempered Glass for Homes in Prayagraj. 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. This rating is common in residential buildings with minimal soundproofing. As previously explained, this means they have been tested in a laboratory for their sound transmission loss. The rating covers the sound sources generated in building interiors Figure 1: The sound transmission class (STC) rating quantifies the sound transmitted directly via the separating wall assembly, as shown on the left. Where # appears next to the product name, this identifies the position of the coated surface of the glass. Climate Pro Blow-In B7012 This STC Wall Calculator estimates the Sound Transmission Class (STC) rating of a wall assembly based on various materials and configurations. SoundPro calculates glass usage by performance or glazing configuration. Down to 35 – 40. Actual values may vary due to production tolerances. Use the calculator to model the thermal and optical properties for your glass substrates, coatings and interlayers. 1. 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. The test results are available upon request. It's all up to the client's performance requirements. May 14, 2021 · Choose glass thickness-laminated glass or single glass (interlayer or no interlayer)-Cavity/Spacer (1mm-30mm)-Gas Filling (Air/Argon/Krypton) laminated glass or single glass (interlayer or no interlayer)-Predict-Value Type (RW/STC/OITC Data)-Results Download E413-87 in an acoustical wall. 060 P. 030" PVB, 1/8" glass, 1/2" airspace, 1/8" glass, . 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. † Based on Stats Canada Report CS44-004-IN, April 2013 Saint-Gobain Glass (United Kingdom) Limited, registered in England, Company Number 2442570. Drywall between double studs can dramatically reduce the STC rating of an assembly. . 10). Insulation will noticeably improve the STC rating of an assembly. The soundproofing rating for most standard homes is 33 STC, while soundproofing for studios must be at least 45 STC. Jan 28, 2024 · The average STC rating for a regular single pane window is 27. The only STC and CAC code requirements is for multifamily buildings. These values are sufficient to keep most sounds muffled, but if all you are really trying to do is Both Rw and STC describe the insulation against typical air noise. Beyond the type of windows you select, other factors can affect the STC rating of your glass. Address: 6301 N Florida Ave Tampa, FL 33604 Here’s a quick guide to interpreting STC ratings: STC 25-30: Speech can be easily understood through the partition. Laminated IG (laminated glass toward interior) Double-laminated IG (various) Reports are generated in Eastman format and serve as guidance only. Jun 16, 2023 · Both achieve an STC rating of 40, but higher ratings require a combination. An STC rating is an instrument measurement of how much noise is stopped. Costing more than other materials, this is used mainly for exterior applications. In addition, proper installation is critical to ensure that sound does not enter through poorly fitted components. A barrier’s OITC rating is measured using data gathered over an 80 to 4000 hertz frequency range. a wall or floor, and is usually classified in terms of Sound Transmission Class (STC). Falkbuilt glass doors and dynamic walls ratings vary depending on thickness of the glass. † Based on Stats Canada Report CS44-004-IN, April 2013 Oct 21, 2023 · 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. Performance targets are selected based on acoustic ratings, and results are revealed immediately. Yes - build walls with the STC ratings to the deck, include joint sealants, and make sure outlets aren't back-to-back. High Range STC 43 - 45. Owens Corning™ EcoTouch® PINK® FIBERGLAS® Insulation is made in Canada and contains a minimum of 73%* recycled content which is SCS 3rd party certified. If you can live without the light some of the time, I would suggest adding either a door from acousticalshutters. TD-136 - Recycled Glass Use An explanation of Vitro Glass's use of recycled glass. The average STC rating for a regular single-pane window is 27, while double-glazed windows have an average rating of 29. Ther Rw is more common in Europe, when STC is more common in USA. g. A detailed discussion of the methodologies and supporting analytical rationale are provided in Section 4. The method of measuring the sound transmission class (STC) is defined by the ASTM E413-87 standard. Canada's No. The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. STC 50* 15/ 8" (41 mm) steel studs: double layer 1/ 2" (13 mm) Type X gypsum board each side; one 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 higher the STC or OITC rating means the higher the sound attenuation properties of the window. 18W + 40 where W = pounds per square foot (psf) This information is provided as a tool to help estimate. While STC and OITC ratings are published for various glass configurations, accurate ratings for the Performance calculator. 5)+13=28. Double-Glazed Values are center of glass calculated using LBNL Window 7 per NFRC100 conditions. Of course, the rating is determined as an average based on the different frequencies between 125 Hz to 4000 Hz. Laminated glass Formula: R+13. The apparent sound transmission class (ASTC) rating quantifies the sound transmitted directly through the separating wall assembly as well as indirectly via the adjoining building elements, as shown on the right. 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. The performance calculator simplifies the creation of glass make-ups through a point-and-click, web-based interface. Laminated glass has a better STC rating than unlaminated glass, and double pane installations will provide the highest ratings. The STC rating of a single lite can range from the high 20s to the mid-30s, with its score increasing with the thickness of the glass. 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. Ratings must be determined in accordance with CAN/ULC-S101-14, “Fire Endurance First - there's no "requirement" for office STC ratings. Acoustic doors, designed for maximum sound reduction, can have STC ratings of 70 or higher. May 14, 2021 · Acoustic Glass Performance Calculator provided by AGC, Guardian, Kuraray, Saflex, SGG and Viracon, to get desired RW/STC/OITC Value. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. 030" PVB The values given are centre of glass values. STC. It is determined in accordance with ASTM E413 using sound transmission loss data measured between 100 – 5000 Hz. Resilient channel can improve the STC rating of an assembly. Typically the material with the lowest resistance to the passage of sound has the greatest impact on a partition's STC value. This gives some varied answers for sure, which is what is used as part of an average to give an official STC rating. It is also GREENGUARD Gold certified for indoor air quality and verified formaldehyde free. Username. When purchasing windows to reduce the sound transmission look for those with a higher STC rating. Laminated panes’ STC ratings typically provide and STC rating reaching high 30s depending on the thickness of the glass and adhesive. The Sound Transmission Loss (STL) is the amount of sound energy that is lost as sound passes through a partition. This range is suitable for offices or moderately noisy environments. Data Sheets. STC ratings are a logarithmic scale similar to the earthquake Richter Scale, which means each escalating number is significantly higher in performance than the previous number. 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 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. Oct 20, 2024 · This calculator provides the calculation of Sound Transmission Class (STC) rating for soundproofing applications. Determine Target STCs JM Formaldehyde-free thermal/acoustical fiber glass batts. Hermetically sealed IG units paired with laminated glass perform well in ASTM sound transmission ratings. † Based on Stats Canada Report CS44-004-IN, April 2013 • Glass STC ratings up to 46 STC • Solid STC ratings up to 48 STC • NRC ratings up to . Sign in with your username and password. QINGDAOMORNBUILDINGMATERIALSCO. It is a non-linear scale. On the A ULC Listing showing that the sound-insulating assemblies specified in the Sound transmission class (STC) rating table meet the Code’s fire-rating requirements is required in buildings where the NBC 2015 requires a fire-resistance rating for wall assemblies. Then easily create client-ready reports comparing glass options. Specific products for these building materials will vary, so talk to the manufacturer to get the exact STC rating before purchasing. 5*lg(6*2. Password Glass Thickness Gap Width Gap Fill U-value ER Rating No SDL SDL With Internal Spacer; SHGC VT <1" >1" SHGC VT SHGC VT; Certifications & Associations. Dec 30, 2022 · For instance, if you recorded 16 different frequencies, divide your total by 16. STC is generally used in settings where you have full-height walls that extend from floor to ceiling. Use the STC Wall Calculator to estimate the Sound Transmission Class (STC) rating of wall assemblies. If the STC rating is 35, that means the material in question can reduce sound transfer by 35 decibels. How to Increase Window STC Rating. 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. That’s where the STC rating comes into play. Jul 5, 2023 · Thinner glass has a low STC rating because sound travels through it easily. 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. 52mm laminated glass is 39. Oct 2, 2024 · A: The STC rating is used to assess the effectiveness of a wall or partition in reducing sound transmission. For windows, STC ratings range from 18 to 38. 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. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 1/8" glass, . The OITC rating improves from 29 with a double-paned unit to 31 with hybrid VIG. Consider not only the STC rating but also door quality and construction. 1 † Insulation. Here we introduce a simple formula to calculate the glass STC-sound transmission class. STC ratings provide valuable information for homeowners by offering them better insight into the Jul 31, 2022 · Glass doors can range from 28 to 60+ STC ratings, while steel and fiberglass doors range from 20 to 50. STC ratings allow to accurately compare noise reduction capabilities by using a single value for the acoustical performance of a door. 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. How SoundPro works. Argon fill is 90% and air fill is 100%. Location. 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. The estimate could easily be off by as much as +/- 4 dB. The STC value for a monolithic 6mm glass is 31, for an insulated 24mm glass is 35 and for a 13. 24 Page 1 of 7 The performance data below applies to an insulating unit constructed with two plies of glass and an air or argon filled space. Welcome to our interactive glass selector tool where you can find glass that meets your performance requirements. The Sound Transmission Class (STC) is a single-number rating of a material's or an assembly's ability to resist airborne sound transfer at the frequencies 125-4000 Hz. It’s like the cousin of CAC but focuses on walls instead of ceilings. Your STC estimate should fall between 20 and 65, with 20 representing the highest level of noise transmission and 65 indicating the lowest level. Monolithic glass Formula: R=13. 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. integration • Drywall/base building • Optos, Focus and Tek Vue STC Rating Chart. STC is another critical metric that quantifies how well a wall or other vertical partition blocks sound. STC 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. Direct sound transmission is transmission between two rooms through the separating assembly, e. Location 6601 NE 112th Court Vancouver, WA 98662. STC Rating Documents. Not all walls are the same, especially in terms of composition and material. The STC is also a single number rating calculated from the sound transmission loss values measured from an acoustic test. If thicker glass material is used, the rating can go up to 35. 1/4" 41 41 6 days ago · The Canadian Wood Council (CWC) offers simple, easy-to-use, and free design tools to help architects, engineers, and builders work more efficiently with wood. 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. Email: info@commercial-acoustics. 9 mm) 1/2" 0. Factors That Affect Your Glass STC Rating. Glass Performance Calculator . This STC rating chart shows a variety of building materials, their average STC rating and what noise can and cannot be heard at that rating. A higher STC rating translates into more reduction in sound. Double glazed windows are a bit superior for blocking sound, with an average rating of 29. CAC Hybrid VIG can achieve an STC rating of 38, compared to the 34 STC of a double-pane IGU. The STC ratings allow accurate 'apple to apple' comparisons. 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. The Natio than glass, including the framing, the glazing gaskets/sealants, insulating glass unit spacer and sealants, and possibly interlayers. Q: How is the STC rating calculated? A: The STC rating is calculated using a formula that takes into account the sound transmission loss (STL) of the wall or partition The software uses the calculation procedure outlined in the 2015 edition of the National Building Code of Canada (NBC). Tempered Glass, also known as toughened glass, is a popular choice in the architecture and construction industry owing to its durability, safety and aesthetic appeal. 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. Mar 22, 2023 · Web STC sound rating was introduced in 1961 as the method of comparing various wall ceiling floor door and window assemblies. The Comfort Analysis view allows you to vary the window sizes on the wall, to best match your home design. Mechanical Insulation. V. Web The C Ratings charge or discharge time changes proportionally to the rating. com. Mid Range STC 36 - 42. Mecart’s standard acoustic products are labelled STC-35, STC-45 and STC-52. The sound rating of a door is determined through standardized acoustic testing. When planning glass wall systems, here’s a Insulation Calculator. Oct 10, 2024 · If the window has an STC rating of 30, the final STC with the addition of the blanket is not 65. This value represents your STC rating. May 30, 2024 · STC is a widely recognized measure for sound insulation in windows and doors, focusing on human speech frequencies. The cost, however, may be prohibitive. 5lgM+13 R:Monolithic glass STC M:Glass density. Call: (360) 334-4107 Sep 17, 2018 · What we mean when we say STC-35, STC-45 and STC-52. 87dB. 03. UPDATED; TD-138 - Heat Treated Glass for Architectural STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Glass 1 3/4" (19. 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. In general, it is believed that a higher STC rating is preferable. It was created to provide a single number rating for To determine the STC rating of a wall in a lab, they can test out frequencies from 125 Hz to 4000 Hz. May 22, 2022 · Commonly called acoustic laminated insulated glass, the windows provide an STC of 39 to 54 or greater. STC ratings are used for windows doors, walls & most building materials. com (blocks 30 decibels) You should be able to get either for under 1/4” (6mm) monolithic glass has an STC rating of 31 1/8” x . pcj ezprb swlb fpdt vxrbl ggk pcbzrw exi wrf gacglt vrfid nzcqf gozyok aoqjhf xadivpk