CoatingsPro Magazine

JUL 2016

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

Issue link: http://coatingspromag.epubxp.com/i/699177

Contents of this Issue

Navigation

Page 16 of 68

16 JULY 2016 COATINGSPROMAG.COM Specifying Success A s building project teams attempt to seal of all possible sources of energy leakage within the build- ing envelope, some have implemented a variety of design details to provide thermal breaks at roof and wall assem- blies, balconies, parapets, and other architectural elements. Structural thermal break assem- blies, such as pads and shims, have been a mainstay for years. Fluid-applied thermal break coatings, though, could revolutionize the process, saving time and money for project teams, reduc- ing the potential for condensation formation, and improving the energy performance of a building envelope. Fluid-applied thermal break coatings could herald a new era in how structural steel assemblies and structural concrete are protected from condensation and energy loss. Let's take a closer look at how that may be possible. Energy Efficiency Compliance Project teams, specifiers in particular, primarily focus on the roof and wall assemblies and then determine their R-values (or lower heat f low, called U-values). T hey do this to meet both code-mandated requirements and the energ y efficiency benchmarks in voluntar y green building rating programs, such as Leadership in Energ y and Environmental Design (LEED) or Green Globes. To go beyond prescribed energy codes, specifers will need to fnd every possible thermal bridge during pre-design and then apply new approaches, such as fuid-applied thermal break coatings, to improve the energy efciency of the building envelope assembly. Termal bridging can have a signif- icant impact on a building project from a compliance and a cost perspective. Heat fows determine the building's heating and cooling system capacity, long-term energy costs (in addition to costs for compliance with energy codes), and voluntary energy perfor- mance code-overlay programs. Te arrangement of steel framing at the building interface can deter- mine surface temperatures, moisture development, long-term durability, and the potential for mold growth within outward-facing building systems and adjacent building materials. Specifying a fuid-applied thermal break coating may help address these issues. Studies in Thermal Bridging It is important to understand how heat is transferred within a building envelope before looking at how thermal bridge coatings can reduce heat fows. American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHR AE)'s Research Project (RP) 1365, Termal Performance of Building Envelope Details for Mid‐ and High‐Rise Buildings, initiated a catalog of thermal performance data for 40 common building details for mid- and high-rise construction. Building engineers at Morrison Hershfeld used heat-transfer software, and they calibrated and validated models against measured and analytical solutions. International Organization for Standardization (ISO) standards for glazing were used, as were 29 guarded hot box test measurements. Tey assessed 40 construction details common to construction methods in North America. W hile there was some focus on glazing, the highest priority was on the details with thermal bridges in three dimensions. Te Morrison Hershfeld research project was initiated when ASHR AE 90.1-2007, Energy Standard for Buildings Except Low-Rise Residential Buildings, was the most ubiquitous standard applied in some state energy codes. It was additionally used as an Energy & Atmosphere (EA) prerequi- site and for credits in LEED 2009 for determining whole building energy performance. (Te current version of the building rating system is set to be updated to LEED v4 in October 2016.) ASHR AE 90.1-2007, though, largely avoided the thermal bridging of outside assemblies, according to Mark Lawton, P.Eng., FEC, of Morison Hershfeld 's Vancouver ofce. Lawton's presentation describes how to comply with energy standards Fluid-applied thermal break coatings could herald a new era in how structural steel assemblies and structural concrete are protected from condensation and energy loss. By Paul Nutcher, CSI CDT, USGBC, AIA Allied Specifying Fluid-Applied Thermal Break Coatings Wr i te in Re ad e r In q u ir y #X X

Articles in this issue

Links on this page

Archives of this issue

view archives of CoatingsPro Magazine - JUL 2016