Air Barrier. But, this also provides flexibility to use other materials like some foam sheathing products to serve as the WRB layer where approved for that purpose and also having a water-resistance equivalent to ASTM E2556 Type II. A stucco application consists of using a weather-resistive barrier with a metal lath that is attached to the substrate of the building. Immediately prior to plastering, the wall should be pre-wetted. Visit our subscription preferences page to subscribe to Industry News or manage your email subscriptions. The distinct embedment characteristics of wire lath and expanded metal reflect the differential zinc coating weight requirements. Building Code (Title 16) Use and Occupancy Letters. This prepares the unit surface to absorb paste from plaster. It also clarifies that the nebulous intervening “non-water absorbing layer” placed between the stucco and the WRB layer has always been intended to apply to materials like foam plastic insulating sheathing (see Section 2510.6.1 option #2 in Figure 2). The weather resistant barrier (WRB) must be installed per Sections R703.6.3 of the Florida Building Code Residential and 1404.2.1 of the Florida Building Code. 2510.6 Water-resistive barriers. Foam sheathing continuous insulation is commonly used for this purpose and, in colder climates, it must be used in the appropriate amount together with an interior vapor retarder to effectively control wintertime outward vapor drives (more on this to come in a future article which will discuss coordinated advancements in the 2021 IBC and IRC water vapor retarder provisions; in the interim please refer to the wall calculators, Research Report 1410-03 Assessment of Water Vapor Control Methods for Modern Insulated Light-Frame Wall Assemblies and Research Report 1701-01 Model Moisture Control Guidelines for Light-Frame Walls: A Building Code Supplement for Builders, Designers, and Building Officials). Older walls may have bond-inhibiting characteristics, in the form of paint, sealer, or some other coating or dirt on the surface. There are two basic stucco applications used in Florida. The cause is led by the inadequate building codes on stucco installation. 35 of the 5th Edition (2014) FBCB. In addition to complying with Item 2 of Section 2510.6.1, a space with a minimum drainage efficiency of 90% as measured in accordance with ASTM E2273 or Annex A2 of ASTM E2925 is added to the exterior side of the water-resistive barrier. Whether joining new stucco to existing or new work a minimum overlap of 2 inches horizontal and 6 inches vertical is required for stucco lath. stucco according to local building codes. The final step in the building permit process is the issuance of a Use and Occupancy Letter certifying that the building has met the minimum standards of the building code. 2017 Pikes Peak Regional Building Code - Errata Last Upload Date: 2/5/2020. Order the 2019 edition of Title 24 from the publishers listed on the Codes tab. Portland cement adheres well to lots of materials, especially to other materials made from the same type of ingredients. Building Code Standards on Stucco . Originally published by the following source: SBC Magazine — March 6, 2020 by Jay Crandell, P.E., Applied Building Technology Group. One-inch (25 mm) minimum thickness of cement grout shall be placed between the backing and the stone veneer. We provide residential, commercial and third party inspections as well as consulting services to homeowners, building … One-coat stucco systems have a third-party report from a model code agency as an application guideline. If it is readily absorbed, then the surface is expected to bond well with stucco. Then three coats of masonry stucco cement are applied in a 3/8-inch scratch coat, followed by a 3/8-inch brown coat, and finally a 1/8-inch finish coat. They agree on what constitutes “best practice” and develop standards to reflect that. On exterior stud walls, adhered masonry veneer shall be installed not less than 4 inches (102 … 2014 FBC - Building, 5 th edition > 25 Gypsum Board and Plaster > 2510 Lathing and Furring for Cement Plaster (Stucco) JUMP TO FULL CODE CHAPTER 2510.1 General Exterior and interior cement plaster and lathing shall be done with the appropriate materials listed in Table 2507.2 and Chapter 35. The 2021 IBC and IRC code improvements to address the above principles are shown in Figure 2 below (only the IBC text is shown; the IRC text is identical). One of the following shall apply for dry (B) climate zones: 2510.6.2 Moist or marine climates. A one hour ferry ride - or thirty minute fast ferry ride - from downtown Seattle, Bremerton is truly a beautiful city. If contamination is present on the substrate surface, good bond is inhibited. SIGNAGE ORDINANCE Contact: Saul Stein (904-255-8726, SaulS@coj.net) In both cases, as a WRB layer or as an intervening “non-water absorbing” layer, the foam sheathing also serves as a “block” or retarder to inward water vapor movement from the stucco. 2019 California Building Standards Code, Title 24, California Code of Regulations. Denver Building Code provides minimum standards for building in order to safeguard public safety, health and welfare. The individual layers shall be installed independently such that each layer provides a separate continuous plane and any flashing, installed in accordance with Section 1404.4 and intended to drain to the water-resistive barrier, is directed between the layers. This question probably arises because plaster is often attached to wall surfaces that have metal lath affixed to them. Archived 2011 Pikes Peak Regional Building Code Last Upload Date: 6/27/2018. This standard contain specific requirements for the materials, methods and quality control used in applying stucco, including approved thicknesses for different application substrates. When applied over a wood base a minimum of two layers grade D paper Frame—Exterior walls of wood, brick veneer, stone veneer, wood ironclad, or stucco on wood. For additional information, visit Continuous Insulation's Water Vapor Control web page. Clarification - Accessible Door Hardware - IBC 1010.1.9.1 The discussion includes a definition of weep screed, citation of building codes relevant to weep screeds, and references to expert sources on weep screed requirements & specifications for various stucco wall drainage systems. EIFS and Stucco Inspections. However, in this latter case, a separate bond-break or non-water absorbing layer must be applied over the foam sheathing WRB as shown in Figure 4 (i.e., the foam sheathing is used as the WRB, not as the intervening non-water absorbing layer). Metal lath is regularly used over stud wall construction with or without sheathing materials. Example of a stucco application variation with foam sheathing WRB layer and a separate non-water absorbing (bond break) layer over the foam sheathing (NOTE: In “moist” and “marine” climates, a means of positive drainage is additionally required for all stucco applications per Section 2510.6.2 of Figure 3). The Drainage Plane.”. Stucco Joint Sealant. Air Barrier Systems. If you have any comments or corrections on this article, please email us and we can publish your comments. In moist (A) or marine (C) climate zones, water-resistive barrier shall comply with of one of the following: In addition to complying with Item 1 or 2 of Section 2510.6.1, a minimum 3/16 inch (4.8 mm) space shall be added to the exterior side of the water-resistive barrier. Weep screed requirements for stucco wall drainage systems: This article discusses the role of the weep-screed in stucco wall drainage systems. STUCCO also called cement plaster, shall be installed following the standards outlined in section 2510 of the California Building Code. This is generally not a concern with new walls. This is the long-standing practice employed with anchored brick masonry veneer by use of a 1-inch air gap and vent or weep holes in the veneer. The building code specification recognizes that the principal long-term condition for corrosion protection is achieved by full stucco embedment of the stucco metal base. In addition, there are two standards from the American Society for Testing and Materials (ASTM) that regulate the application of stucco: In moist (A) or marine (C) climate zones, water-resistive barrier shall comply with of one of the following: Figure 3. The last 2 inches (51 mm) of each wire leg shall have a right-angle bend. EIFS and conventional stucco applications are part of the International Building Code (IBC). Senturion I, II and III Florida Department of Community Affairs Florida Product Approval FL 13447 Texas Department of Insurance This gap also allows for what is known as “hygric re-distribution” (for more information please refer to see BSC article: “Drain the Rain, On the Plane. Your inspector may want to see an additional layer of building paper or asphalt felt on the exterior side of the Home Slicker Stone and Stucco, because the wording of the building code gives your inspector that latitude. These improved provisions do two very important things consistent with the above-described principles. In the state of Arizona, every local jurisdiction is responsible for establishing and enforcing building codes.However, the Manufactured Housing Division, part of the Arizona Department of Housing (ADOH), maintains standards of safety and quality for all manufactured homes, factory-built buildings, and accessory structures. © Truss Publications, Inc. All rights reserved. 03 00 00 - Concrete 07 00 00 - Thermal & Moisture Protection 09 00 00 - Finishes 10 00 00 - Specialties 31 00 00 - Earthwork Project Experience Commercial. View more . In addition, the traditional WRB requirement in option #2 (i.e., 60-min Grade D paper) is clarified to allow alternative WRB materials with at least equivalent water resistance of ASTM E2556 Type II, such as various building wrap materials. The Drainage Plane, continually seeks to improve the value it provides, Editor's Message: Three Lessons Learned from 2020, President's Message: We Are Technology Brokers. Effective January 1, 2020. There are two main standards organizations in North America, the American Society for Testing and Materials (ASTM) and the Canadian Standards Association (CSA). Stucco & Building Waterproofing. With a substrate of concrete or concrete masonry, is it necessary to use lath? What It Isn't. Consequently, some enhanced practices are necessary to protect the moisture-sensitive portions of the wall assembly from wetting due to inward vapor drives. Check out this extra section in each digital issue of SBC Magazine for additional news, perspective, and advertiser content. Figure 4. A bond break shall be provided between the water resistive barrier and the cement plaster (stucco) consisting of one of the following: 1. People often ask us if stucco, or portland cement plaster, will adhere to concrete or concrete masonry. The entire surface must have uniform bonding potential or you can run into problems. When solar-driven drying occurs after a rain event, the inward vapor drives can readily exceed the magnitude of outward vapor drives experienced during the winter (see Figure 1). Click to enlarge. These are two small docu- ments with prescriptive requirements that are easily read and understood. SDCI Closures, Service Updates, and Inspection Requirements. For the answer to question 2, contact your local building department. These documents cover the ingredients and the application of portland cement plaster, or stucco. Sean Shields contributed to this article. Well, here’s the first installment and it addresses some very useful improvements and clarifications made to the Portland Cement stucco water-resistive barrier (WRB) provisions. Potential for bond can be quickly checked by a simple test: sprinkle the wall with some water to see how it absorbs. 1.087 mm ) minimum thickness of cement grout shall be separated from the same type of.! Have a minimum bare steel thickness of cement grout shall be separated from the stucco by a simple:! Use and Occupancy Letters to see how it absorbs entire surface must have uniform bonding potential you. 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