Tempered glass stc rating. 32 STC Solid Melamine Walls .
- Tempered glass stc rating (STC/OITC), high altitudes, FireLite® IGU is composed of FireLite products and tempered / annealed float glass with an insulating unit between to be listed as fire-rated or fire/impact safety rated. The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. Anyone have an opinion on 3/8" tempered TEILEN SYSTEM APPROXIMATE STC RATINGS PRODUCTS . Glass Analytics online tools offer a comprehensive suite of engineering and analytical reports 1/4" glass = STC 31 1/2" glass = STC 36 I'm not trying to be insulting, but as a matter of curiosity I googled "glass STC" and the very first page had that data. The higher the rating, the more effectively it will accomplish that goal. Resolution: STC stands for Sound Transmission Class. This rating The STC rating is the average amount of noise stopped at 18 different frequencies, measured in decibels. The average STC rating for a regular single-pane window is 27, while Tempered glass may seem like a sturdy sound barrier, but its fatal flaw. 46 . 43 . STC 36: Standard ½” glass (clear tempered) STC 34: Standard 3/8” glass (clear tempered) So go Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 1/4" (7. Shop premium glass products. A triple-layer coating that blocks solar gain, reflects heat, and lets light in. Fact Sheets STC Air Pocket Between Glass Panes: The distance between the two panes of glass in double-glazed units affects STC. How Changes in STC Affect Maximum In addition to functioning with clear glass, Solarban ® 60 glass also can be combined in insulating glass units (IGUs) with an outboard lite of tinted or reflective-tinted glass to increase aesthetic In fact, dual-pane windows with dissimilar glass can achieve STC ratings nearly as high, if not as high, as triple-pane or laminated glass. Product Features. At 1/8 inch thickness, it has an STC rating of 30. Its original intent Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. 32 STC Solid Melamine Walls . Our comprehensive line of Standard Acoustical Substrate: with a standard rating of 49 STC, or optional ratings of 42 STC, 45 STC or 50 STC. 24 mm) 1/8" 0. 93dB Of course there’re many PVB manufacturers such as Kuarary,Decent has developed new PVB Hermetically sealed IG units paired with laminated glass perform well in ASTM sound transmission ratings. The most popular soundproof glass we sell is made of quarter inch glass on both sides with a half of an inch Tempered glass. An STC label delineates how partitions and walls effectively block sound and reduce noise. To determine the U. Frame Construction: 18 Gauge Remarkably Neutral. 1 Class A and CPSC 16CFR 1201 (CAT I When integrating acoustic glass partition systems into offices or commercial spaces in Singapore, one important factor to consider is the Sound Transmission Class (STC) rating. (OITC) ratings. The increased flexural strength of tempered glass better resists deflection. safety glass product. As the latest evolution in solar control low-e glass, Solarban ® 90 glass conveys an appearance similar to that of clear glass in both color and reflectance, whether Estimated Glazing Type STC ¼” Tempered Safety Glass 31 ½” Tempered Safety Glass 36 ¼” Laminated Safety Glass 35 ½” Laminated Safety Glass 38 1” Insulated (¼” Lite, Choose from clear and low-iron varieties of tempered or laminated glass in ¼” (6 mm), ⅜” (10 mm), or ½” (12 mm) thicknesses. Triple Insulating Glass Construction STC Acoustic Glass Performance Calculator provided by AGC, Guardian, Kuraray, Saflex, SGG and Viracon, to get desired RW/STC/OITC Value Performance Target (OITC, Muraflex STC rating 3/8" Tempered Glass – 1” air space – 1/2" Laminated Glass . Wall Assembly. Then on its surface forms the compressive Phone:0086-400-089-8280 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. glass options • 6mm framed glass only • Tempered and Laminated • Clear, Frosted finishes. float glass manufacturer to have its entire selection of products recognized by the Cradle to Cradle Certified™ program, and the and is available heat-strengthened and tempered. -1/8" (total 1/4" thick), 1/4"-0. Interior Glass Systems by dormakaba. 1/4″ Clear Tempered – CAT II Impact-Rated (Fire-Rating) Nilai STC 30 dB berdasarkan klasifikasi nilai STC dalam ASTM E413 – 04 dan Introduction to Sound Transmission Class dari Gailer & Assosiates diketahui bahwa nilai STC dari pintu kaca Each pane of tempered glass, except tempered spandrel glass, shall be permanently identified by the manufacturer. For reference, Solid Glazed Wall STC Rating 3/8" Clear Tempered Glass I. Outperforms tinted glass. Optional Steel Skins: with optional ratings of 49 STC or 51 STC. The STC rating of windows depends on the thickness of the glass, use of PVB or EVA, the number of panes, the frame material, and weather-stripping seals. Having your windows tested for sound Glass Product Type and Thickness STC Rating OITC Rating; ¼" Monolithic Glass: 31: 29: ½" Monolithic Glass: 36: 33: Keep in mind that the STC and OITC rating numbers equate to ordinary glass • Unlikely to shatter or chip when bombarded with thrown rocks, bricks or bottles. 38 - 40. With an innovative blend of metal Both tempered and laminated glass have safety applications across various industries, and choosing the right solution depends on its characteristics, purpose, STC Ratings (2) Case Study (1) Healthcare (1) see STC Ratings for Windows and Glass. -1/4" (total 1/2" thick), Two common acoustical rating systems are: Sound Transmission Class Rating (STC) – applicable to interior building partitions and viewing windows where the sound source is human speech Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. STC ratings are used for windows, doors, walls and most building materials. I. Keeps the view while beating the heat. Glass Approvals: ANSI Z97. Basic Info Tempered glass is one kind of safe glass being produced by the heating flat glass to its softening point. 24 Page 1 of 7 Due to continual product research and development, Glass 3 Spacer STC OITC Test Date Number STC Lab Test Results 1/8" single pane glass Tested at various air spacing between the test glass and a Soundproof Window 27 STC Test Glass - STC Test Result Range: 43 52 40 50 60 70 T Our spec sheets offer a detailed look at individual products, and include information on product features, options, and performance data. It’s a rating that measures sound attenuation through building materials, such as brick, concrete, glass, etc. This involves balancing STC Laminated Glass Stc Rating; Laminated Glass Stc Rating - Factory, Suppliers, Manufacturers from China. Additional advantages of laminated glass include: Figure 1: shattered laminated glass • Tempered glass is not a composite TEMP20™ – 20-Minute Fire Protective 1/4″ Thick Tempered Glass for Doors. STC ratings are a logarithmic scale similar to the earthquake Richter Scale, which Factors that affect glass STC. The materials are Glass Performance Data Values are center of glass calculated using LBNL Window 7 per NFRC100 conditions. Example:6mm clear tempered glass A glass type’s STC rating measures how effectively glass will provide sound insulation. 5)+13+7=42. Read more about it! Over 400 Products Specializing in Noise, Customize your workspace with the SOLO P60 Glass Panel, which shares similarities with our popular SOLO P30 Glass Panel. STC Rating. 1/4″ thick tempered fire Tempered glass can also be used in these applications. ) 34. Muraflex STC Testing . S. But laminated glass is different. 0 This guide provides an introductory overview of glass concepts and terminology, Tempered Glass. Tempered Glass. Overall Glazing Thickness: Exterior Glass They have a much higher STC rating than standard windows. 3mm thick monolithic glass, glass STC is only 30Dbs,when glass thickness was Marvin offers many glass types for your windows and doors, including insulating options and surface coatings, giving you energy efficiency for your home. Tempered glass is either chemically or thermally treated to improve its strength. 88 Size: Reference chart on page 2 Ratings achieved at that size are representative of all sizes of the same Tested 5 Glazing System; STC. How well materials 1/4" Tempered Glass 1/2" Air Space 1/4" TEMPERED GLASS 1/4" Thick Clear Heat Treated Glass Approximately 4 Times Stronger Than Annealed (Ordinary) Glass Breaks Into Small GL 4 TEMP20™ 20 Minute Fire Protective Glass • 1/4" thick tempered fire-rated glass • Superior optical clarity – clear and wireless • Economical fire and safety rated glass • Etched with fire Fire Rating: None. As well, annealed and tempered glass of the same thickness have Ratings achieved at that size are representative of all sizes of the same configuration. 3 The STC rating is important when you are trying to reduce the amount of sound entering or leaving a room. Glass surfaces are STC ratings are an established way to average how much sound is stopped by something. /sq. If it’s double-paned, that goes up to 28. Double 6 (1 ⁄ 4 “) and (5 ⁄ 16 “) MM Tempered Glass: STC Rating of 38. The effective sound transmission reduction is over 70% (Particularly Understanding Soundproofing Concepts. Browse 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. -1/8" (total 3/8" thick), 1/4"-0. regular glass is about 4-5 times stronger, and it’s more affordable than laminated glass. Simplify project planning with accurate measurements. Choose from two styles of COMO Framed doors—one with spacers and the other with a spray paint border—to match Single hung and picture windows are now available with a glass package that achieves an STC 35, while sliding windows achieve an STC 34. Acoustic Partition Systems. When isolated ½” tempered glass panels are tested, typically in accordance with At 1/4 inch thickness, it has an STC rating of 31. STC Rating 35; Impact Safety-Rated: Complies with IBC Requirements for Use in Doors. It shatters into small, safer pieces if broken as • Glass STC ratings up to 45 STC • Solid STC rating of 44 STC • Door STC ratings up to 45 STC. Home; About; Media; Products; Applications; Resources; FAQ's; Free Quote; Contact; Product Data Sheets. Fire Rating: None. The STC rating Below is a list of common wall types and their estimated STC ratings that could be used as a guideline for design. (Note: Not tempered glass with one or more invisible interlayers sandwiched together to create a stronger, sturdier glass unit. At JELD-WEN, for example, we offer a PURE® Sonos Framed Glass Wall Systems provide the transparency of glass combined with Sound Transmission Class (STC) rating to enhance privacy. Sound Transmission Class A2000 Series Sliding Glass Doors (1) A3000 Series Sliding Glass Doors (1) Restorations Series V5500 (1) Sunrise Series V4500 Sliding Glass Doors (1) STC Ratings (6)Zip file Thermal with a lot of glass which must achieve a specific STC rating. • UV stabilized to resist solar exposure • Manufactured in USA • 5 year Manufacturer Warranty • A single pane of glass has an STC rating ranging from the high-20s to the mid-30s, with its score rising as the glass gets thicker. 85 NRC . A regular window has an STC rating of 27. If sound reduction is a priority, look for a window in the 30-35 STC range. This is especially the case for low frequency noises such The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. Laminated glass is stronger and blocks UV light, but tempered glass is much cheaper. Custom glass available. The higher the STC rating, the more sound will be dampened. Rankings are then calculated using a non-combined logarithmic for For glazing that is installed within a building interior, the Sound Transmission Class (STC) rating may be a more appropriate measure, as it describes the approximate decibel level reduction The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. The soundproofing rating for most standard homes Ordinary annealed glass breaks easily. The STC is also a single number rating calculated from the sound transmission loss values measured from an acoustic test. Among the numerous glass options available, annealed glass and tempered glass have emerged as two of the sought-after However, it is important to note that different glass options, as well as the use of combination units, may affect the sound abatement performance of the unit. The STC (Sound Transmission Class) rating is a single-num ber STC Ratings for Windows. Pim Foam or Dura**** 1/8 1/8 - 29 22 4/19/07 TL07-271 1/8 3/16 1/8 5/32 3/16 1/8 5/32 1/8 1/8 1/4 1/4 1/8 1/8 LAM LAM 1/8 Operating Style Series Insulation will noticeably improve the STC rating of an assembly. Sound transmission class. Monolithic glass Formula: R=13. Meets ANSI Z97. Double glazed windows are a bit superior for blocking sound, with an average rating of 29. If you’re considering tempered glass for your home or STC ratings of 50 and higher are used in professional studios and other applications where a quiet environment is a must. 03. Patch fittings give the architect or designer a variety of options for creative expression with tempered glass. These ratings are estimated, meaning that actual laboratory test data, 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 E413-87 in an acoustica l wall. 030" P. 52mm tempered laminated glass STC=13. Examples would be a 100 Series window with STC upgrade Whether it is a building or renovation project, selecting the perfect glass is of the utmost importance. Impact safety-rated: complies with IBC requirements for use in doors. Other glass make-ups available including FireLite-NT IGU. It is made of two or more plies of glass with a vinyl interlayer between (sandwiched, if you will, as in a car’s windshield). Tempered glass, while stronger, shatters under a greater impact. It’s important to first understand requirements, such as Sound Transmission Class (STC) ratings, decibel levels, glass types, necessary materials, STC, or Sound Transmission Class, is a measurement that indicates how effectively a material or structure reduces sound transmission. 2 psf Light Transmission: 89% STC: 32 U-Value:. Glazing System. Laminated glass provides security for both homes and TABLE 1B: GLASS SOUND REDUCTION RATINGS Rw (dB) Page 3/3 situations, the Rw does not account for all noises generated. -1/4" (total 1/2" thick), Here we introduce a simple formula to calculate the glass STC-sound transmission class. ’s experience with STC/OITC has led them to fi nd that these ratings are not specifi c to any one frame material. * * [The data and information set forth are based on samples tested and are 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. Sound Transmission Class (STC) rating: 37-46 ; SCS Indoor Advantage Gold Tempered glass goes through a rapid cooling process that results in a piece of glass that is four times resistant to impact than ASTM E413 is the classification for rating sound insulation. Laminated glass also withstands forced entry and deflects up to 99% of damaging Select StormBreaker Plus • 1/4” thick clear heat treated glass • Approximately 4 times stronger than annealed (ordinary) glass • Breaks into small harmless fragments • Can NOT be cut after manufacturing • 11" Two Panes of tempered glass with a metal spacer in a sealed insulated glass unit Approx. Soundproof glass will usually have an STC rating of 25-55 depending Fire Rating: None. Glass also exhibits increased sound insulation performance with thicker dimensions, although STC stands for Sound Transmission Class. A leader in tools for the glass industry. Also available in different IGU • Glass STC ratings up to 46 STC • Solid STC ratings up to 48 STC • NRC ratings up to . Cardinaltemperingincreases theglassstrengthtonearly fourtimesthatofordinary glass,whiledistortionremains minimalandcolorisvirtually unnoticeable. Call us with any questions! Sound Transmission Class (STC) rating. Company. The STC value for a monolithic 6mm glass For instance, all tempered or laminated glass of the same thickness will have a similar STC, respectively. Acoustic Properties of This table compares Vitro Architectural Glass product performance data when assembled in a one-inch (25 mm) insulating glass unit with a ½-inch (13 mm) air space and two ¼-inch (6 mm) 1/4” (6mm) monolithic glass has an STC rating of 31 1/8” x . FireLite IGU is a fire HEAT TREATED GLASS Heat treated glass,is glass that processed with tempering furnace . Any It should be noted that STC ratings obtained in a lab may be different than those achieved in real-world applications. Description. The identification mark shall be acid etched, sand blasted, Exception: The STC Rating: 35 Glass with this designation has been tested to meet impact safety requirements required for areas such as doors, sidelights, and areas close to the floor. A wider gap provides better sound insulation by minimizing A typical dual-pane window has an STC rating of 25-30. Tempered glass vs. Laminated glass is basically a glass sandwich. 5lgM+13 R:Monolithic glass STC M:Glass density. ,LTD YourturnkeyChinatemperedglass/laminatedglass/insulatedglasssupplier Add: Rom A3 04,S he Find a School Guard Glass product data spec sheet for your project here. 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 OA Glass 1 Glass 2 Acoustical Ratings - Tuscany I V400 updated 09. It is determined in While it is possible to achieve an STC 36 rating with a glass wall assembly it is not as simple as placing ½” tempered glass in aluminum extrusions. ft. 5+10*2. IQ: Insulating Glass. This balanced assembly blocks noise infiltration through high STC ratings, impact resistance and Float glass – normal glass panes; Tempered glass – no effect on soundproofing; Laminate – a decent option for type of glass for your project. 1, Class A; and CPSC 16 CFR 1201 Category II. Products in this range include our SL70 with insulated tempered glass, our 1/4" Thick Tempered Glass. TEMP20™ is a clear fire-rated and impact-safety-rated glass for 20-minute fire doors. About The STC (Sound Transmission Class) is a rating system for interior building partitions and viewing windows used to categorize acoustic performance. Quiet acoustics with STC rating of 50; Paint it, wrap it, inkjet print on it; Key Features. The Noise Isolation Class (NIC) is a rating that defines an entire assembly’s Discover the versatility of the SOLO Framed Door, featuring a sleek aluminum frame surrounding one layer of glass. ; mm) Depth: 7/8” (22 mm) Width: 2-15/16” (75 mm) Weight (lbs. The STC Rating can improve from 28 (Dual 1/8" glass panes with 3/8" air space) to 41 when SoundTITE is added. This glass package combines asymmetric Choose from a range of glass design options, including switchable magic glass, curved glass, reeded glass, one-way mirror, or tinted glass, to perfectly complement your aesthetic As Chicago tempered glass manufacturers, we often get asked about the sound-blocking capabilities of our products. 3/8" Tempered Glass – 2” air space – 1/2" Laminated Glass . How It Works: Pair the COMO Glass Panel with our range of compatible doors and accessories to complete your office transformation. For reference, Solid Glazed Wall STC Rating 3/8" Clear Example: 21. Frame Construction: 18 Gauge The strength imparted in the tempering process dramatically increases the ability of fully tempered glass to resist bending forces. 52mm clear tempered laminated glass - BUILDING COMMERCIAL GLASS MANUFACTURERS FACTORY IN CHINA 13. V. B. Glass siz e and glazing system will a˜ect STC rating. Guardian Glass has developed easy-to-use, advanced software for glass and glazing system analysis. 5*lg(10*2. Tested. Double 10 (3 ⁄ 8 “) MM Tempered Glass: STC Rating of I cant find any test done on 3/8" tempered glass for an stc rating or whatever the correct way of measuring glass sound travel is. 5/8” Melamine Particle STC Ratings Updated: 08/19/2021 by K. 030 P. The sound-dampening interlayer provides a 50% sound reduction over the standard glass with an STC rating of 35. Glass Type: Clear Laminated Glass. SOLO P60 has a wider frame width of 60x30MM which STC rating. Door Thickness: 1-3/4" NGP (National Guard) - L-FRA100 Vision Lite Tempered glass is up to four times stronger than non-tempered glass. SOLO P30; SOLO Tempered Glass fully tempered glass is approximately four times stronger than annealed glass of the same thickness and configuration, and residual surface compression must be over 10,000 The average STC rating for a regular single pane window is 27. Q. Visible Light Transmission 75% Groove (in. Rating OITC ; Overall Glazing ; Rating Thickness Exterior ; Glass Thickness Resolution: A UL 20 minute fire rating is the maximum fire rating for a Full Glass (FG) door design. 36 STC 1/2" Tempered Glass; 38 STC 1/2" Laminated Glass; 39 STC 1/2" Laminated Glass w/ Soundproofing has become essential in our modern world, and when you're considering window replacements, it's crucial to determine if tempered glass offers sufficient Efficiently calculate glass weights with our Glass Weight Calculator. Its original intent was to quantify interior building partitions, not Figure 1. How STC Ratings are Determined. An STC (Sound Transmission What is an STC Rating? STC (Sound Transmission Class) rating is a crucial consideration for architectural laminated glass customers. Estimated STC Rating. For Falkbuilt glass doors and dynamic walls ratings vary depending on thickness of the glass. About Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 Single Laminated Glass 1 1/4" (7. 52 clear tempred lamianted glass also know as Pros of Tempered Glass. 1 Class A and CPSC 16CFR 1201 STC 31 The higher the STC rating, the less noise you’ll hear through the glass. Increasing glass thickness is the most important measurement. Help Center; Log In / Register 1-844 . Glass Appearance: Clear. With the 670-720℃ and fast coolling process,the surface and interior compression changed and The 56 STC studio windows are similar to the 45 STC window, but have an extra pane of ¼” laminated glass that is situated vertically behind the slanted IG unit in the front part of the window. These windows are used extensively in If the window has an STC rating of 30, the final STC with the addition of the blanket is not 65. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. 1/8" 35 35 The values given are centre of glass values. 3. 32 STC Framed Walls Product . Our items are commonly identified and trusted by customers and may fulfill Performance documents for altitude limits, NFRC ratings, center of glass, joining window load table, air infiltration, and more. The STC rating measures how well a material can A single pane of glass has an STC rating ranging from the high-20s to the mid-30s, with its score rising as the glass gets thicker. OITC Rating. 35 STC Frameless Walls Product . GLASS OPTIONS • 10 and 12mm seamless glass • Tempered and Laminated • Clear, Low Material: Fire-rated tempered alkaline safety glass Thickness: 1/4" (6 mm) Weight: 3. It is important to note that the above listed glass performance will differ to that of a window assembly using these products. STC Ratings: Plexiglass vs Glass STC ratings provide an industry accepted method for comparing the sound reduction effectiveness for various sound doors and windows. 030 Thinner glass has a low STC rating because sound travels through it easily. Ratings are determined by broadcasting a specific auditory tone near the material, and measuring dB on bothsides. The glass QINGDAOMORNBUILDINGMATERIALSCO. In the USA, it is widely used to rate interior partitions, ceilings/floors, doors, windows and exterior wall configurations. 3 (77. Hybrid VIG can achieve 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. Window Glass: Technical Glass Guide Update 6/15/21 – Version 3. A. OITC, on the other hand, covers a broader frequency The Pros and Cons of Laminated Safety Glass. *OITC is estimate d base d on this test. 5) TECHNICAL SPECIFICATIONS The STC rating determines how effectively the glass can block sound transmission. A soundproof window, on the STC is a rating of how well a building partition attenuates airborne sound. If thicker glass STC Rating 49 Approx. In bustling city centers, near airports, or close to railroads, STC IGs are often considered due to their noise-reduction capabilities. Frame Profile: Low. For doors, the STC rating is Glass STC Rating: 35. By comparison, a ¼” laminated glass has an STC rating of ~34 dB. A higher STC rating indicates a greater sound Muraflex (FINO) STC Values and Configurations; Single tempered glass panel configurations; - 3/8” Tempered Glass panel STC 36 - 1/2” Tempered Glass panel STC 38 Single laminated Insights on Sound Transmission Class (STC) Ratings; Acoustic Testing Insights: Lab, Field, and Simulation; Blog; Contact; About Us; Products. Lab results are highly controlled and may not reflect the same performance STC is a widely recognized measure for sound insulation in windows and doors, focusing on human speech frequencies. T. Glass Thickness: 1/4" Glass STC Rating: 35. Glass thickness. The higher the STC value, the better its insulation. 1. Today more architects and building the sound transmission class rating BTG 13. 30% OFF Explore All Deals | National Guard Products L-FRA100-SP-138 Vision Lite Kit Pack with 1/4″ Clear Tempered Glass for 1-3/8" Thick Door in GPZ Gray Primer Finish. You would have to do more serious calculations to find the right answer, or test the Single 12 MM (1 ⁄ 2 “) Tempered Glass: STC Rating of 36. 2. Where to Buy | Find A Contractor | Become A Certified 1″ (25mm) insulated unit, incorporates 5/16″ (8mm) FireLite Plus with 1/4″ (6mm) Tempered Glass. This door system creates a smooth access with essential ironmongery components, including a concealed door closer, Cardinal's LoĒ³-366 glass is the new standard in energy efficiency. HS glass cannot be cut or drilled after heat-strengthening and any alterations, such as edge-grinding, sandblasting or acid-etching, can cause premature failure. Products with a rating of 30 to 35 STC can reduce the volume of normal speech to a quiet murmur. 3 5/8" metal studs, 5/8" gyp (2 layers total), No insulation. Laminated glass has a better STC STC Example : ¼” Monolithic glass has an STC of ~31dB. jvlp aqvue okyht okgb xhxsoy rhbi kaigri lqgsi zkgei bopmy tns vra dhdpy ewmkg ckbnujcp