Stc rating glass The IsoDoor SD is well suited for any wall with an STC rating of 55 or lower. 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 and/or office equipment. A window’s STC rating varies based on the thickness of glass, a gas fill between the panes, and a window’s air tightness. There are custom sizes available. In the USA, it is widely used to rate interior partitions, ceilings and floors, doors, windows and exterior wall configurations (see ASTM International Classification E413 and E90). May 18, 2023 · Sound Transmission Class ratings, commonly referred to as an STC rating, is an integer rating that details how well a building partition reduces airborne sound waves. 03. -1/8" (total 1/4" thick), 1/4"-0. Laboratory testing is used to measure the resistance of partitions such as walls, windows, or entry doors to the passage of sound. For instance, a double hung window made with 1/4" annealed glass and a 1/2" air space may have an STC rating of 33. The glass to interior ratings, when tested to ASTM E1425 and ASTM E90, shall not be less than STC 38 and OITC 30. However, soundproof windows can have an STC rating of 48-54 or higher Mar 30, 2023 · Also, an acceptable STC rating for walls may be different from the acceptable STC rating for floors, depending on whether the walls are shared by a neighbor, or a room is directly beneath a kitchen with heavy traffic. STC 35-45: Loud speech is audible but less intelligible. _____ Ultimately, STC ratings are one of the best ways to compare different types of windows and doors when you’re looking to overhaul your home’s sound insulation system. Mass pigmented and decorative interlayers can also be used to provide a wide range of effects. Staggered or double stud walls are higher rated than single stud walls. If sound reduction is a priority, look for a window in the 30-35 STC range. Feb 19, 2024 · Explore the STC rating chart for walls, glass, windows, doors, and materials. To determine the specific STC ratings of glass and a May 30, 2024 · Sound Transmission Class (STC) rating, calculated according to ASTM E413, measures the sound insulation of a window or door across the frequency range of 125 to 4000 HZ, primarily covering human speech frequencies. How does STC glass compare to standard glass? Standard glass has an STC rating around 26, while specialized STC glass like that in the 1500 Vinyl Collection can reach ratings up to 35, providing nearly double the noise reduction. STC Ratings of Glass. Single-pane windows can have an STC rating around 25. Yes, the glass panel alone retains its original STC rating, yet the completed wall assembly on most demountable glass wall systems will now typically test in the low to Most residential applications benefit from STC ratings between 30 and 40, depending on external noise levels. It lists the construction details and thickness of single laminated glass, laminated insulating glass, airspaced glass, monolithic glass, and various wall constructions. Jun 21, 2019 · Windows with dissimilar glass typically have an STC rating around 34 which is similar to the STC rating of standard exterior walls. Double glazed windows are a bit superior for blocking sound, with an average rating of 29. Glass thickness. 030 P. Laminating glass is a popular way to increase an STC rating. Examples would be a 100 Series window with STC upgrade or a 400 Series window with laminated glass. 5lg(M1+M2)+13+R1 R:laminated glass STC M1,M2:Glass panel density The performance data below applies to an insulating unit constructed with two plies of glass and an air or argon filled space. Securing a higher STC rating than this is possible but impractical because it is more expensive and sound can enter through lower-performing parts of the home such as the exterior walls. The materials are tested in controlled conditions at frequencies ranging from 125 Hz to 4000 Hz and the performance is then converted into an STC rating. The STC values roughly indicate the number of decibels that a material will block within a given range of frequencies. Sound Enhanced Laminated Glass Standard to PrivaSEE is 1/2″ (13 mm) laminated glass with a sound enhanced interlayer providing reduced sound transmission. This rating is common in residential buildings with minimal soundproofing. 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. 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. Jan 28, 2024 · The average STC rating for a regular single pane window is 27. See full list on dillmeierglass. 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. Case Studies. 060 P. Cam Lift Hinges come in standard or electrified models. Our proprietary and fully sound tested IsoDoor SD will achieve an STC and OITC rating appropriate for most projects. Ensure you understand the testing methodology, installation quality, and the role of sound absorption It should be noted that STC ratings obtained in a lab may be different than those achieved in real-world applications. 030" P. A change of ±1 in A typical dual-pane window has an STC rating of 25-30. Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 1/4" (7. A detailed discussion of the methodologies and supporting analytical rationale are provided in Section 4. Lab results are highly controlled and may not reflect the same performance in the field based on the conditions of your environment. 2. The STC (Sound Transmission Class) is a rating system for interior building partitions and viewing windows used to Triple Insulating Glass Construction STC OITC 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. Acoustical Guide – Determining Minimum STC Rating Figure 1. How Is Sound Transmission Class Rating Determined? STC ratings are determined with acoustic testing that adheres to the ASTM E90 standard. It is a logarithmic scale and ranges from 18 to 50 for windows. Laminated glass with an air pocket is often recommended for better soundproofing. Sound Transmission Class (STC) rating. The glass to center ratings, when tested to ASTM E1425 and ASTM E90, shall not be less than STC 37 and OITC 30. STC ratings are the ONLY way to accurately compare various noise reduction products. As discussed in Section 2, STC ratings and the Rw for most glass configurations are equal. For instance, in residential buildings located in noisy urban environments, selecting glass with a higher STC rating can significantly improve occupant comfort by reducing 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. 5 Interior Glass Trends Within the Hospitality Industry. It's particularly effective for interior partitions as it reduces the Factors that affect glass STC. At this rating, you may be able to hear very loud sounds faintly, but most sounds you won’t hear at all. * Rating of 34 is dependent on the type of glass package. 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. 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. *OITC is estimate d base d on this test. Phone: 888-815-9691. STC ratings are used for windows, doors, walls and most building materials. 1/8" 35 35 Oct 10, 2024 · If the window has an STC rating of 30, the final STC with the addition of the blanket is not 65. E413-87 in an acoustica l wall. 33 Single layer of 1 ⁄ 2-inch (13 mm) drywall on each side, wood studs, no insulation (typical interior wall) 39 Single layer of 1 ⁄ 2-inch (13 mm) drywall on each side, wood studs, fiberglass insulation [33] 44 May 22, 2022 · STC window rating depends upon several factors – glass thickness, laminated glass, the airspace between panes, and how and what the frame is constructed of. 1. At JELD-WEN, for example, we 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. A higher STC rating indicates superior sound insulation. Of course, the higher the STC rating, the better. Address: 6301 N Florida Ave Tampa, FL 33604 STC Sound transmission class (STC) measured in decibels (dB) is a method for rating sound attenuation characteristics of wall systems. 5)+13=28. 62mm rifle lead core full metal copper jacket, military ball). -1/8" (total 3/8" thick), 1/4"-0. Falkbuilt solid walls include Super Studs, floor and ceiling tracks that come equipped with acoustic resonators that prevent sound from traveling. It’s a rating that measures sound attenuation through building materials, such as brick, concrete, glass, etc. Visual Concealment Glass 3 Spacer STC OITC Test Date Test Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Trinsic I V300 updated 04. A change in STC rating, much like noise, is logarithmic. Neat Glass and Preserve Protective Film VT's Sound-Resistant STC Doors. Hermetically sealed IG units paired with laminated glass perform well in ASTM sound transmission ratings. With a wide breadth of sound-rated opening glass walls, NanaWall offers aesthetic product options to interior architects and designers. STC ratings allow to accurately compare noise reduction capabilities by using a single value for the acoustical performance of a door. Email: info@commercial-acoustics. Insulation will noticeably improve the STC rating of an assembly. Windows and doors can help block outside noises whether you live in the city or on a farm. The STC and ISO RW values indicate the acoustical performance ratings, with higher numbers indicating better sound Aug 21, 2024 · STC ratings range from 0 to 100. Laminated glass Formula: R+13. When 1• double laminated insula1ing glass (1/4" laminated glass-1/2" air space-114• laminated glass) is used instead, the STC rating increases to 38. 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. The capacity of an element in a building structure to support a weight in addition to its own. Mar 21, 2024 · Air Pocket Between Glass Panes: The distance between the two panes of glass in double-glazed units affects STC. Cardinal's laminated glass offers sound dampening, reducing audio decibel levels in high-noise areas. When planning glass wall systems, here’s a Dec 31, 2024 · Gaps or weaknesses in the frame can compromise the STC rating. A single pane sheet of ¼” glass has an STC rating of 31. If you double the air space, you can generally get about a 3 dB improvement in the transmission loss. With a glass-to-frame ratio of over 80% (or more with our Frameless product), glass choice adds to the aesthetics of the interior space. A high STC rating can mean the difference between a peaceful oasis and a Sound Transmission Class (STC ) is an integer rating of how well a building partition attenuates airborne sound. The unique design of the Cam Lift Hinge offers enhanced radial strength, longer lasting performance, and easy maintenance. Specialized Hybrid Performance All Krieger doors can be configured with optional add-on features and different ratings to meet your specific performance needs. 52mm laminated glass is 39. Typically the material with the lowest resistance to the passage of sound has the greatest impact on a partition's STC value. . 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. Technical Glass Guide Update 6/15/21 – Version 3. Tell us about your -114• glass) with an STC rating of 34. Laminated panes’ STC ratings typically provide and STC rating reaching high 30s depending on the thickness of the glass and adhesive. If thicker glass material is used, the rating can go up to 35. STC ratings range from 25 (limited sound insulation) to 60 (excellent sound insulation), but context matters. The insulating glass units are constructed with two plies of glass and an airspace. 24 Page 1 of 2 Due to continual product research and development, details listed are subject to change at any time Most other wall unit products are not fire rated, but Krieger’s Acoustical Door and Window Wall Assembly comes with a fire label and is fire rated up to 45 minutes with glazing, or up to 3 hours with acoustical transom or side lite panels. Additional options include clear laminated (unit STC of 34) and clear tempered (unit STC of 32). So if it’s peace and quiet you’re looking for, our quality vinyl windows deliver. STC For a typical single pane window you can expect a STC Rating of 18-20. It is determined in accordance with ASTM E413 using sound transmission loss data measured between 100 – 5000 Hz. 24 mm) 1/8" 0. Here we introduce a simple formula to calculate the glass STC-sound transmission class. insulating glass units. STC 30 = This is where most dual-pane windows perform. While standard windows are rated at 26 or less, our sound control glass offers a STC rating of up to 34*. Learn why STC ratings matter for soundproofing. Krieger offers tested and certified glass options, including acoustical glass, fire rated glass, smart glass, clear glass, optical white glass, low-emissivity (low-e) glass, and more. The test measures the airborne sound attenuating characteristics of partitions, floors Here’s a quick guide to interpreting STC ratings: STC 25-30: Speech can be easily understood through the partition. 70 60 --STC38 Jul 31, 2022 · Glass doors can range from 28 to 60+ STC ratings, while steel and fiberglass doors range from 20 to 50. STC is highly dependant on the construction of the partition. Additionally, a glass wall assembly can never test higher than the STC rating of the glass. For this reason, STC (Sound Transmission Class) ratings have become a primary consideration when choosing doors for large-scale projects. Adding additional layers of drywall can improve the STC rating of an assembly. What Is a Good STC Rating? An excellent rating is an STC of 60 or higher. Here’s a quick guide to understanding STC grading. Double-Glazed Data is based on testing ~36″ x 84″ glass to ASTM E413-87 in an acoustical wall. Higher ratings mean better sound This optional upgrade (standard in Anlin Del Mar Series) can be combined with any of Anlin’s High Performance Glass Packages, including Anlin QuadraTherm. Acoustic doors, designed for maximum sound reduction, can have STC ratings of 70 or higher. 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. Metal stud walls perform better than wood stud walls. Glass siz e and glazing system will a˜ect STC rating. This is why INFINIUM’s Refine and Quantum Double-Glazed wall systems offer the highest STC ratings. The STC ratings allow accurate 'apple to apple' comparisons. glass areas but not enough to make much difference in the majority of architectural glass sizes; > Sound reduction will improve with the use of Acousta™ laminated glass due to the vibration dampening effect of the interlayer. -1/4" (total 1/2" thick), 1/4"-0. 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. -1/2" (total 3/4" thick), panels caulked in place in single frame with wooden stops and glazing putty. com 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 for the sound of human speech. If your target STC rating is 39, then you will likely need to increase the air space to 2". Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. 87dB. 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. B. At STC 25 and below, you can hear a basic conversation from the outside. On the STC Partition type 27 Single pane glass window (typical value) (dual-pane glass window range is 26–32)"STC Ratings". Class (STC) rating. Consider not only the STC rating but also door quality and construction. 1/4" 41 41 V. The final STC/OITC rating of the window assembly will typically be reduced from the base glass acoustical rating. 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. Sep 2, 2023 · STC stands for Sound Transmission Class. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. The IsoDoor SD is generally used in assemblies with standard framed walls with Green Glue Compound/MLV, resilient channel, and/or staggered stud framing. Feb 11, 2025 · The result is sound control over a greater range of frequencies and a significantly higher Sound Transmission Class (STC) rating than a window with standard dual-pane glass. Pim Foam or Dura**** 3/32 3/32 - 28 23 4/19/99 TL99-145 Operating Style Series Numbers Glass 1 Glass 2 Spacer STC File Name 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. A wider gap provides better sound insulation by minimizing direct sound transmission. 4. An extra pane of glass can give a dual pane window a rating between 26 and 33. Increasing glass thickness is the most important measurement. I. Krieger’s industry-leading Cam Lift Hinge is included with higher STC-rated assemblies (doors with STC 45 or lower come with a standard or butt hinge). 0 This guide provides an introductory overview of glass concepts and terminology, plus Jun 2, 2024 · With soundproofing, the higher the STC rating, the better the soundproofing becomes. Example:6mm clear tempered glass STC=13. In the US, it is widely used to rate interior partitions, such as demountable walls and/or glass walls, ceilings/floors, doors, windows and exterior wall configurations. Noise is one of the single most common complaints at hotels, condos, and other commercial properties. 1/4" 41 41 to provide conservative estimates of required STC or Rw ratings to be used by the building designer as a planning tool for window glazing. Sound Transmission Class ratings. STC ratings are determined in a laboratory under controlled conditions. STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Glass 1 3/4" (19. That being said, anything below an STC rating of 40 might garner comments about paper thin walls. Even then, differences of 1-2 points STC can occur for the same assembly in the same laboratory. 6. A typical window’s STC is 26 – 28, a dual window from Soundproof Windows is anywhere from 48 – 52, and in most cases even higher. In the fi eld, fl anking noise, quality of material and construction practices can lead to widely varied STC’s for the same assembly. The STC value for a monolithic 6mm glass is 31, for an insulated 24mm glass is 35 and for a 13. Reduce up to 50% of outside noise compared to typical dual-pane windows. Glass laminati on encompasses adhering two panes of glass together with a special adhesive that adds strength and blocks soundwaves. Laminated & Double-Glazed Glass. See additional notes below data for specific It should be noted that STC ratings obtained in a lab may be different than those achieved in real-world applications. Outdoor-Indoor Transmission Class (OITC) – applicable to exterior walls (including doors and windows) where the Jun 16, 2023 · Learn about glass sound insulation, the importance of Sound Transmission Class (STC) ratings, and how higher STC ratings help reduce sound transmission. Using a single number, the Tranquility® Sound Transmission Class (STC) rating identifies the sound transmission reduction of a glazing unit, operating casement units test out at STC40. This document provides sound transmission class (STC) ratings for various glass and wall constructions. The final STC/OITC rating of the window assembly could vary because of the influence of the framing members and the construction of the window assembly. 3mm thick monolithic glass, glass STC is only 30Dbs,when glass thickness was increased to 12mm thick,glass STC can reach 36Dbs,whether it’s single piece monolithic glass,laminated glass,or insulated glass,the thicker total glass thickness,the better sound transmission loss. The higher the number, the more sound is being stopped. 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 With a wide breadth of sound-rated opening glass walls, NanaWall offers aesthetic product options to interior architects and designers. Windows and other products with an STC of 38 effectively combat noise pollution in the 60db - 90db range. Costing more than other materials, this is used mainly for exterior applications. The first measure of acoustic performance is referred to as the Sound Transmission Class or STC. 1/4” (6mm) monolithic glass has an STC rating of 31 1/8” x . Dec 7, 2023 · In simpler terms, the STC rating offers an indication of how soundproof a wall or floor/ceiling structure may be. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. An STC rating is an instrument measurement of how much noise is stopped. When you are comparing how effective a window is at stopping sound, the STC rating is used (Sound Transmission Class). Several Seves Glass Block products are proven to have STC levels of 39 and above. STC Ratings: Plexiglass vs Glass Soundproofing. For reference, standard house walls are 33 STC, Oct 25, 2021 · To reduce transmission of ordinary "safe zone" noises, the chosen sound dampening materials should have a minimum Sound Transmission Class (STC) of 38. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing 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 glass constructions only. It enables dynamic, collaborative team spaces adjacent to focused workspaces without creating noise disturbances. Jan 18, 2022 · STC Ratings Updated : 01/18/2022 by K. Save as PDF 800 Park Drive , Owatonna , MN 55060 US | (800) 533-2080 Feb 12, 2024 · Otherwise, STC ratings should be enough to insulate your home against excessive external noise. Compared to single-pane windows STC Rating up to 45 (Studio 4) & 56 (Studio 6) Frames available in Clear Anodized or Bronze Anodized; 4° angled glass for best acoustical performance; Easy installation – we include installation instructions & necessary shop drawings; Glass shipped separately to avoid breakage – simple snap-in glass installation on job site As all the components come together to form the completed wall, the “assembly” STC rating will begin to drastically fall below the stated STC 36 rating of the glass panel. The glass to exterior ratings, when tested to ASTM E1425 and ASTM E90, shall not be less than STC 38 and OITC 31. The STC is also a single number rating calculated from the sound transmission loss values measured from an acoustic test. This range is suitable for offices or moderately noisy environments. Typically a two (2) or more point change The ability of the glass to stop various types of ammunition. STC rating from 48 to 64 (higher for triple-glazed) and glazing from 1/4” to 1 – 3/16” thick with a vertical or sloped glass design. 800-782-5742 Talk to an expert! Jun 15, 2024 · STC Ratings for Windows and Glass. Typical dual glazed windows can achieve better ratings of 25-27. The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. Its original intent was to quantify interior building partitions not exterior wall components. In general, a higher STC rating blocks more noise from transmitting through a partition. Resilient channel can improve the STC rating of an assembly. The higher the STC rating, the more sound will be dampened. *OITC is estimated based on this test. 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. 5. 9 mm) 1/2" 0. A. The higher the STC or OITC rating means the higher the sound attenuation properties of the window. April 02, 2021. A rating of 40 is the minimum for conversation privacy, and many building codes now require a rating of 50 to 55. December 22, 2022. Double-glazed glass can also achieve an STC rating of up to 40. com. 4 ways our insulated glass units (IGU) block out noise: 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. 24 Page 1 of 7 Jul 5, 2023 · Thinner glass has a low STC rating because sound travels through it easily. Seals and Gasketing: Even the highest-rated door will perform poorly without effective A higher STC rating translates into more reduction in sound. Learn more. The higher the STC rating, the higher the sound attenuation properties of the system. The average STC rating for a regular single-pane window is 27, while double-glazed windows have an average rating of 29. Industry Insights. 400 Series Frenchwood® Hinged Patio Door Hardware (Trim Set) Exploded View Windows generally have STC ratings ranging from 18 up to 38, depending on the thickness of the glass and whether they are single or double paned. ’s engineering excellence results in being able to achieve an STC rating of 53 – the highest on the market. Explore noise reducing windows and doors from Pella. 17. Laminated and double-glazed glass both hold STC ratings of 40, but anything higher typically calls for a combination of the two. 5lgM+13 R:Monolithic glass STC M:Glass density. 3. * The STC rating of windows can be affected by: whether they are single or double-pane, the size of the gap between the panes, if gas is inserted between the panes, the thickness of the glass, and how airtight they are. May 22, 2022 · STC ratings of 50 and higher are used in professional studios and other applications where a quiet environment is a must. When evaluating STC ratings for partitions, it’s crucial to consider key factors that influence sound insulation effectiveness. V. 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. For windows, STC ratings range from 18 to 38. The rating covers the sound sources generated in building interiors May 6, 2020 · As a result it is not recommended for glass selection of exterior wall applications since the single-number rating was achieved under a specific set of laboratory conditions. 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. STC ratings are used for windows doors, walls & most building materials. The four-point increase in STC rating is the resuH of dampilg provided by the PVB intedayer used in the laminated glass. 5*lg(6*2. The acoustical seal can also block in air and actually help regulate temperature and control smoke. Monolithic glass Formula: R=13. Now that we’ve discussed what STC ratings mean let’s see how glass and plexiglass compare. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 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 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. Higher numbers show greater sound resistance. Glass size and glazing system will affect STC rating. Ratings are assigned in levels from 1 to 8, with a Level 8 rating being the highest (able to stop a 7. To give you a perspective on how STC rating for materials work, normal steel or timber has an STC rating of 13. Laminated glass has a better STC rating than unlaminated glass, and double pane installations will provide the highest ratings. Glass Kits: If your door includes glass panels, the type and thickness of the glass will affect the STC rating. msgqd rrzpd qbzek mtk hxhey wqgm orddyc blqhr syumi yqgqwz pzrhs wkiok qdhgy esigu mzaahl