{"id":13079,"date":"2022-03-01T16:55:33","date_gmt":"2022-03-01T16:55:33","guid":{"rendered":"https:\/\/insulation.org\/io\/?post_type=articles&#038;p=13079"},"modified":"2022-03-25T16:55:44","modified_gmt":"2022-03-25T16:55:44","slug":"here-are-the-codes-you-need-for-metal-building-envelope-projects","status":"publish","type":"articles","link":"https:\/\/insulation.org\/io\/articles\/here-are-the-codes-you-need-for-metal-building-envelope-projects\/","title":{"rendered":"Here Are the Codes You Need for Metal Building  Envelope Projects"},"content":{"rendered":"<p><a href=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_01.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-13067\" src=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_01-300x204.jpg\" alt=\"\" width=\"300\" height=\"204\" srcset=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_01-300x204.jpg 300w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_01-1024x698.jpg 1024w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_01-768x523.jpg 768w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_01-1536x1047.jpg 1536w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_01.jpg 1548w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<h2>The Difference between ASHRAE and IECC<\/h2>\n<p>First, ASHRAE 90.1 is a minimum standard of energy efficiency, not a code. The International Energy Conservation Code (IECC) is a model energy code that references the ASHRAE Standard 90.1. Other differences include:<\/p>\n<ul>\n<li>ASHRAE 90.1 and IECC have different 3-year cycles.<\/li>\n<li>IECC follows behind ASHRAE 90.1 by 2 years. For example, IECC 2012 references ASHRAE 90.1-2010. IECC 2015 references ASHRAE 90.1-2013.<\/li>\n<li>IECC adopts some of the latest ASHRAE standard, plus any addendums and new data. This means that IECC is ultimately a more stringent code than the ASHRAE standard.<\/li>\n<\/ul>\n<h3>What Is in an Energy Code?<\/h3>\n<p>There are three major components of an energy code:<\/p>\n<ul>\n<li>Lighting,<\/li>\n<li>HVAC, and<\/li>\n<li>Envelope.<\/li>\n<\/ul>\n<p>Additionally, there are many elements within the building envelope subject to energy code regulations:<\/p>\n<ul>\n<li>Opaque roof and wall assemblies,<\/li>\n<li>Windows,<\/li>\n<li>Skylights,<\/li>\n<li>Doors,<\/li>\n<li>Foundation, and<\/li>\n<li>Floor.<\/li>\n<\/ul>\n<p>This article focuses on changes to roof and wall assembly code requirements, but remember that there are updates to other elements of the building envelope to be aware of.<\/p>\n<h2>Code Adoption by State<\/h2>\n<p>The resources we use for state code changes include the Department of Energy (DOE), the Building Codes Assistance Project, and the International Code Council. Table 1 is a comprehensive list of code adoptions in each state and the District of Columbia, and is current as of December 2021. Think of this as a guideline to help determine which adoptions have been made in your state.<\/p>\n<p><a href=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_02-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-13068\" src=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_02-159x300.jpg\" alt=\"\" width=\"159\" height=\"300\" srcset=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_02-159x300.jpg 159w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_02-544x1024.jpg 544w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_02-768x1446.jpg 768w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_02-816x1536.jpg 816w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_02-1088x2048.jpg 1088w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_02-scaled.jpg 1360w\" sizes=\"auto, (max-width: 159px) 100vw, 159px\" \/><\/a><\/p>\n<hr \/>\n<p>Table Notes:<br \/>\n* A review of the codes in place in jurisdictions across the state indicates that<br \/>\n86% (Hawaii) and 82% (Arizona) of the population is covered by codes at this level.<br \/>\n^ When an amendment impacting energy efficiency can be quantified using DOE Prototype Building Models, they were captured in the analysis.<\/p>\n<p>Notes:<br \/>\n1. A home rule state is one where codes are adopted and enforced at the local level. Some home rule states will have a mandate that jurisdictions can go above code but also have to meet a certain minimum code. In general terms, the idea of home rule is defined as the ability of a local government to act and make policy in all areas that have not been designated to be of statewide interest through general law, state constitutional provisions, or initiatives and referenda.<br \/>\n2. States with extensively different baseline codes for which conducting custom analysis would be cost prohibitive and out of scope of this analysis.<br \/>\n3. For states adopting both IECC and 90.1, the IECC code is usually analyzed as the state current code in this study, except for states with extensive amendments to the IECC.<\/p>\n<hr \/>\n<h2>The Newest Code Cycle: IECC 2021 and ASHRAE 90.1-2019<\/h2>\n<p>It has been a strange couple of years with the COVID-19 pandemic, and most ASHRAE meetings have been virtual. However, the work of each new standard has continued on. Thus, we refer to IECC 2021\/ASHRAE 90.1-2019 as the \u201cnewest\u201d code cycle. As of 2022, IECC 2021 and ASHRAE 90.1 2019 are published and will be adopted by some states this year.<\/p>\n<p>In terms of updates, you can expect to see the majority of changes in air sealing and blower door testing. Additionally, there is a reduced BTU table for semi-heated space. This means that the maximum allowable heat output per climate zone has been reduced, thus making the semi-heated compliance path more difficult to use. Remember that these comparisons are based on IECC 2015\/ASHRAE 90.1-2013. Many changes found in IECC 2021\/ASHRAE 90.1 2019 concern mechanical systems and lighting. Additionally, commercial buildings will require EV-capable or ready charging stations.<\/p>\n<p><a href=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_03.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-13069\" src=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_03-233x300.jpg\" alt=\"\" width=\"233\" height=\"300\" srcset=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_03-233x300.jpg 233w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_03-797x1024.jpg 797w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_03-768x987.jpg 768w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_03.jpg 1122w\" sizes=\"auto, (max-width: 233px) 100vw, 233px\" \/><\/a><\/p>\n<h2>The Most Widely Adopted Code: IECC 2015\/ASHRAE 90.1-2013<\/h2>\n<p>As you probably noted in Table 1, the most widely adopted code cycle is IECC 2015 and ASHRAE 90.1-2013. If your current state\u2019s code is based on the IECC 2009\/ASHRAE 90.1 2007 Standard, you will see the most significant jump in envelope changes. Many states currently at the IECC 2009 code are bypassing IECC 2012 altogether (or have already done so) and adopting IECC 2015. Pennsylvania and South Carolina are examples of this. On October 1, 2018, Pennsylvania changed from IECC 2009\/ASHRAE 90.1-2007 to the IECC 2015\/ASHRAE 90.1 2013 code. South Carolina did the same as of January 1, 2019. This is a huge jump, and many metal building contractors will feel the pressure. If you have not used liner systems or filled cavity\/long tab banded systems in the past, you will need to start using them. Both options fulfill the metal building insulation requirements\u2014it is just a matter of preference. Key differences between the systems are detailed later on in this article.<\/p>\n<p>Highlights of the IECC 2015\/ASHRAE 90.1-2013 cycle include following.<\/p>\n<p><strong>Higher insulation values:<\/strong> IECC 2015 and ASHRAE 90.1-2013 have the most stringent envelope requirements based on \u201cConditioned Space\u201d and \u201cNon-Residential Space\u201d (see Table 2). The newest code, IECC 2021 and ASHRAE 2019, reflect these values.<\/p>\n<p><a href=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_04.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-13070\" src=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_04-295x300.jpg\" alt=\"\" width=\"295\" height=\"300\" srcset=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_04-295x300.jpg 295w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_04-1008x1024.jpg 1008w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_04-768x780.jpg 768w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_04.jpg 1104w\" sizes=\"auto, (max-width: 295px) 100vw, 295px\" \/><\/a><\/p>\n<p>ASHRAE Table 3.2, used for determining semi-heated space, has not changed from older code cycles.<\/p>\n<p><a href=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_05.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-13071\" src=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_05-300x236.jpg\" alt=\"\" width=\"300\" height=\"236\" srcset=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_05-300x236.jpg 300w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_05-1024x807.jpg 1024w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_05-768x605.jpg 768w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_05.jpg 1147w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>If semi-heated is not allowed, based on the heating system or jurisdiction, then each climate zone will have major increases in thermal performance, which translates to increased insulation levels under the non-residential space. This is based on ASHRAE 90.1-2013; however, the IECC 2015 code has the same values, for the most part. For example, using ASHRAE 90.1-2013, climate zone 5a requires a roof U-value of .037 and a wall U-value of .050. In order to obtain these U-values, a metal building would require either a liner system or filled cavity\/long tab banded system for the roof, and a liner system filled cavity for the walls. Other options include insulated metal panels and board insulation with R-values comparable to the U\u2011values noted above.<\/p>\n<p>As previously noted, of some changes to semi-heated space, see the new Table 3.2 published in ASHRAE 90.1-2016.<\/p>\n<p><a href=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_06.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-13072\" src=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_06-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_06-300x300.jpg 300w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_06-1024x1020.jpg 1024w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_06-150x150.jpg 150w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_06-768x765.jpg 768w, https:\/\/insulation.org\/io\/wp-content\/uploads\/sites\/3\/2022\/03\/IO220308_06.jpg 1161w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><strong>Air barrier requirement:<\/strong> Both IECC 2015 and ASHRAE 90.1-2013 require an air barrier in the thermal envelope, and for it to be indicated in drawings. It can be placed on the interior side, exterior side, somewhere within assemblies composing the envelope, or any combination thereof.<\/p>\n<ul>\n<li>In IECC 2015, this can be found in section C 402.5.1 and C 402.5.1.1. (exceptions = unheated buildings).<\/li>\n<li>In ASHRAE 90.1-2013, it is found in section 5.4.3, 5.4.3.1.1, and 5.4.3.1.2. (exceptions = semi-heated buildings in climate zones 1-6).<\/li>\n<\/ul>\n<p>It is also mandatory to identify the air barrier, and for it be continuous across joints and assemblies. Joints and seams must be sealed and securely installed. Penetrations and joints\u2014and seals associated with penetrations\u2014must be sealed in a manner compatible with construction material and location. These must be shown on the drawings submitted for permitting.<\/p>\n<p><strong>Compliance path:<\/strong> Under the IECC 2015 Code and ASHRAE 90.1-2013, it is still the same choice. The designer decides to follow one of three paths: materials, assembly, or whole building. The materials path is just that\u2014any material tested under ASTM E2178. Assembly is a combination of envelope materials built and tested under ASTM E2157, 1677,<br \/>\nor 283. Whole building testing requires ASTM E779. If this option is used, and the building fails, it must be brought in compliance with the leakage rate allowed. This means that you cannot opt out of this path once it is chosen by the designer. ASHRAE 90.1-2013 does allow a lesser leakage rate if repairs are made.<\/p>\n<p><strong>States that have adopted IECC 2015\/ASHRAE 90.1-2013 include:<\/strong> Alabama, California (where it is known as Title 24), Illinois, Maryland, Massachusetts, Michigan, New Jersey (adopted ASHRAE 90.1-2013), New York, Oregon, Utah, Texas, Vermont (state-specific code modeled after IECC 2015 and, in some cases, IECC 2021), and Washington. Georgia is also slated to adopt the code cycle over the next few months. Many changes happen on January 1st of the new year, in addition to June and July.<\/p>\n<h2>The Biggest Question to Answer in 2022: \u201cWhat Do I Need to Meet Code?\u201d<\/h2>\n<p>As we move toward more complexity in each code cycle, this longstanding question will only become more common. As simple as the question is, it is very difficult to answer. In short, the compliance path I recommend most often is the prescriptive approach. Per the U.S. DOE, the prescriptive approach includes \u201crequirements that either must be met by every building design, or if the requirement is not met, a tradeoff must be made to make up for not meeting that requirement.\u201d In other words, you must meet all U-values of the roof, walls, foundation, and fenestrations. If a tradeoff is indeed needed in the end, the quoted price has covered any changes.<\/p>\n<p>Some other areas of building envelope I have had to address come from the IBC (International Building Code)\u2014more specifically, the structural code. The important section to review is Section 1402.2: Weather Protection, which covers weather-resistive barriers in exterior walls. If the metal building wall panel supplier has not tested its panels per ASTM E331, compliance can be difficult. ASTM E331 is the exemption for having to create a wall cavity designed with flashings and a means for draining water that enters the assembly.<\/p>\n<h2>Closing Remarks<\/h2>\n<p>In closing, the code cycle changes that are either here or coming soon to your state are, without a doubt, challenging to say the least. Insulation suppliers located throughout the country have had to attend meetings, learn, and be involved with the entire process of code development to ensure our customers are providing code-compliant envelopes to their customers and, on a bigger level, the metal building industry. Overall, it has been a good year for metal building construction. The newest code changes mean more efficient buildings and more innovative solutions that have greater potential to save end users money.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Along with standards, codes set the foundation for much of our work. Here is a look at the latest ASHRAE and International Energy Conservation Code updates affecting metal building construction, where they have been adopted, and what you need to know to be compliant.<\/p>\n","protected":false},"author":[257],"featured_media":0,"template":"","categories":[564],"class_list":["post-13079","articles","type-articles","status-publish","hentry","category-march-april-2022-2022","author-bill-beals"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.0 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Here Are the Codes You Need for Metal Building Envelope Projects - Insulation Outlook Magazine<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/insulation.org\/io\/articles\/here-are-the-codes-you-need-for-metal-building-envelope-projects\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Here Are the Codes You Need for Metal Building Envelope Projects\" \/>\n<meta property=\"og:description\" content=\"Along with standards, codes set the foundation for much of our work. 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