ASTM_C_1516_-_05_2017.pdf

Designation:C151605(Reapproved 2017)Standard Practice forApplication of Direct-Applied Exterior Finish Systems1This standard is issued under the fixed designation C1516;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice covers the minimum requirements andprocedures for field application of Direct-applied ExteriorFinish Systems(DEFS).Direct-applied exterior finish systemsare coating systems applied over various substrates withnon-metallic reinforcing mesh,in which the base coat rangesfrom not less than116in.(1.6 mm)to332in.(2.4 mm)in drythickness,depending on the mass of the reinforcing mesh.Thisbase coat is subsequently covered with a finish coat that isavailable in a variety of textures and colors.1.2 The values stated in inch-pound units are to be regardedas the standard.The metric values given in parentheses areapproximate and are provided for information purposes only.1.3 This standard may involve hazardous materials,opera-tions and equipment.This standard does not purport to addressall of the safety concerns,if any,associated with its use.It isthe responsibility of the user of this standard to establishappropriate safety and health practices and determine theapplicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC1063 Specification for Installation of Lathing and Furringto Receive Interior and Exterior Portland Cement-BasedPlasterC1177/C1177M Specification for Glass Mat Gypsum Sub-strate for Use as SheathingC1186 Specification for Flat Fiber-Cement SheetsC1278/C1278M Specification for Fiber-Reinforced GypsumPanelC1325 Specification for Non-Asbestos Fiber-Mat Rein-forced Cementitious Backer UnitsE1825 Guide for Evaluation of Exterior Building WallMaterials,Products,and Systems3.Terminology3.1 Definitions used in this standard shall be in accordancewith Terminology C11.3.2 Definitions of Terms Specific to This Standard:3.2.1 accessories,npreformed metal,fiberglass or plasticmembers used to form corners,edges,control joints,ordecorative effects.3.2.2 back wrapping,na deprecated term.See wrap.3.2.3 base coat,na material,either factory or field-mixed,used to cover the substrate and to encapsulate the reinforcingmesh.3.2.4 cold joint,nthe visible junction in an exterior finish.3.2.5 cure,vto develop the ultimate properties of a wetstate material by a chemical process.3.2.6 dry,vto develop the ultimate properties of a wetstate material solely by evaporation of volatile ingredients.3.2.7 durability,nthe capability of a building,assembly,component,product,or construction to maintain serviceabilityover not less than a specified time.3.2.8 embed,vto encapsulate a non-metallic reinforcingmesh in either the joint compound or exterior finish.3.2.9 expansion joint,na structural separation betweenbuilding elements that allows independent movement withoutdamage to the assembly.3.2.10 factory mixed,na material that is prepared at thepoint of manufacture and is ready to use without the additionof other materials,except possibly water to adjust consistency.3.2.11 field mix,na material that is mixed in the field withother components,water,or both.1This practice is under the jurisdiction of ASTM Committee C11 on Gypsumand Related Building Materials and Systems and is the direct responsibility ofSubcommittee C11.05 on Application of Exterior Insulating and Finish Systems andRelated Products.Current edition approved April 1,2017.Published April 2017.Originallyapproved in 2002.Last previous edition approved in 2011 as C1516 05(2011).DOI:10.1520/C1516-05R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.2.12 finish coat,nthe final wet state material,thatprovides color or a