gypsum board reflectance

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Identify recycling locations for gypsum board waste. The primary environmental impacts of gypsum are habitat disruption from mining, energy use, and associated emissions in processing and shipment, and solid waste from disposal. It is a measure of the percentage of light which is reflected off of a given panel surface. 0 Their LEED workflow doesnot say anything about shades / blinds. EcoRock is naturally cured and dried, which means that 80% less energy is required than the traditional methods use in the manufacturing process. Specify lightweight gypsum board products, which have 25-30% less weight than standard gypsum board. There is a significant amount of gypsum board waste disposal – it is estimated that 300,000 tonnes (330,700 tons) per year of gypsum board waste from new construction alone are generated as a result of over-ordering, incorrect specification, damage, and off-cuts during construction3. It is not effective in staggered-stud walls or with single studs and clips. Questions should relate to this product specifically. The apparent density of paper gypsum boards is 800~950 kg/m3, the thermal conductivity is about [0.20 W/(m•K)], soundproof coefficient is 35~50 dB, and bending load is 400~800 N, the surfaces are smooth, and the dimensions are stable. LEEDuser is supported by our premium members, not by advertisers. Gypsum wall board is a benign substance (basically paper-covered calcium sulfate), but it has significant environmental impacts because it is used on a vast scale; domestic construction uses an estimated 30 billion square feet per year. Greater reduced floor frequency and deflection were observed when a gypsum ceiling was attached to a glued floor. When referring to ceiling panels, what is the meaning of type, form and pattern? A typical board application is shown in Figure 6.5a. I can't seem to find it listed in the product documents from manufacturers. The 48-in. Speech Reduction Caused by Ceiling Absorption (Chanaud, 1983): 2.5 m (8 ft) Separation. All rights reserved. J.C. Batista Abreu, in Recent Trends in Cold-Formed Steel Construction, 2016. Forum access is included with all levels of LEEDuser membership (basic and premium). At low frequencies the transmission loss through the box is high enough, due to the impedance mismatch, that there is little effect. Gypsum board is one of several building materials covered by the umbrella term “gypsum panel products.” All gypsum panel products contain gypsum cores; however, they can be faced with a variety of different materials, including paper and fiberglass mats. (b) Example of 70,000 ft.2 of vegetated roof on the LDS Assembly Hall building, Salt Lake City, UT. Gypsum wallboard is a benign substance (basically paper-covered calcium sulfate), but it has significant environmental impacts because it is used on a vast scale; domestic construction uses an estimated 30 billion ft.2/year. Figure 7.1. Thermal properties of gypsum are available in tabular form or through sets of linear equations (Chen et al., 2014; Thomas, 2002; Sultan, 1996). In the United States and Canada gypsum board is manufactured to comply with ASTM Specification C 1396. The different panel substrates provide panels with unique characteristics. All questions and answers follow USG’s Terms & Conditions. Protect gypsum board from water, moisture, and extreme temperatures. Gypsum board is available in a variety of standard sizes, though 4 ft wide by 8 ft high is the most common. Figure 16.15 shows the variation of Articulation Index with ceiling material in the presence of masking sound. Again i don;t know if there is an option within Insight to set up a automated shade run. The paper exteriors and gypsum cores of gypsum board can be made from high percentages of recycled material, but this results in limited to no energy savings because it must go through the manufacturing process again. 9.6, fastening the OSB subfloor to the joists with glue in addition to screws yields increases the composite action between the OSB subfloor and steel joists and the transverse flexural stiffness of the floor, which consequently increase the floor frequency and decrease deflection. It is sometimes confused with fly ash another coal combustion product with which it has very little in common. Gluing the OSB subfloor also results in a decrease of the floor damping ratio. When risk of moisture exposure is present, choose products and systems that offer adequate resistance. Since speech reduction is a combination of distance attenuation and the absorption of the ceiling panels, a higher ceiling may allow the selection of a less expensive ceiling material. Can electrochromic glazing qualify as a glare control device? 0000002432 00000 n (2016). According to an Industry Average EPD, every 93 board meters (1,000 board feet) of drywall produced requires about 5,048 MJ of non-renewable primary energy (electricity and natural gas usage)4. All Rights Reserved. Reflective light fixtures and metallic diffusers should not be located where a reflection will cause a degradation of the ceiling absorption. Synthetic, or Flue Gas Desulphurization (FGD) gypsum, is a by-product of coal-fired power plants3. and 24 in. Typically, the whiter and smoother the ceiling panel, the higher the LR value. As shown in Fig. PDF 677.1 KB, USG Ceilings Portfolio Series: Episode 1 - Installation & Edge Style, USG Ceilings Portfolio Series: Episode 2 - Performance Features, USG Ceilings Portfolio Series: Episode 3 - USG Panel Types, USG Donn® Brand CE™ 1-1/2" Acoustical Suspension System, USG Donn® Brand DXLA™ 15/16" Acoustical Suspension System, USG Donn® Brand DX®/DXL™ 15/16" Acoustical Suspension System, USG Donn® Brand ZXLA™ 15/16" Acoustical Suspension System. © 2020 BuildingGreen, Inc. All rights reserved except where noted. How far in advance can I order ceiling panel before installation? Fiber-cement siding has proven to be very durable, and many products are backed by 50-year or lifetime warranties. Considerations: Earth or lime plasters last a long time and require relatively little maintenance.

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