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Designation: E 241 – 00 An American National Standard Standard Guide for Limiting Water-Induced Damage to Buildings 1 This standard is issued under the fixed designation E 241; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 This guide concerns building design, construction, com- missioning, operation and maintenance. 1.2 This guide addresses the need for systematic evaluation of factors that can result in moisture-induced damage to a building or its components. Although of great potential impor- tance, serviceability issues which are often, but not necessarily, related to physical damage of the building or its components (for example indoor air quality or electrical safety) are not directly addressed in this guide. 1.3 The emphasis of this guide is on low-rise buildings. Portions of this guide, in particular sections 5, 6, and 7, may also be applicable to high-rise buildings. 1.4 This standard is not intended for direct use in codes and specifications. It does not attempt to prescribe acceptable limits of damage. Buildings intended for different uses may have different service life expectancies, and expected service lives of different components within a given building often differ. Furthermore, some building owners may be satisfied with substantially shorter service life expectancies of building components or of the entire building than other building owners. Lastly, the level of damage that renders a component unserviceable may vary with the type of component, the degree to which failure of the component is critical (for example whether failure constitutes a life-safety hazard), and the judge- ment (i.e. tolerance for damage) of the building owner. For the reasons stated in this paragraph, prescribing limits of damage would require listing many pages of exceptions and qualifiers and is beyond the scope of this standard. 1.5 This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limita- tions prior to use. 2. Referenced Documents 2.1 ASTM Standards: C 168 Terminology Relating to Thermal Insulating Materi- als 2 C 717 Standard Definitions of Terms Relating to Building Seals and Sealants C 755 Practice for Selection of Vapor Retarders for Thermal Insulation 2 C 1193 Standard Guide for Use of Joint Sealants D 1079 Standard Definitions of Terms Relating to Roofing, Waterproofing, and Bituminous Materials E 331 Test Method for Water Penetration of Exterior Win- dows, Curtain Walls and Doors by Uniform Static Air Pressure Difference 3 E 547 Test Method Water Penetration of Exterior Windows, Curtain Walls, and Doors by Cyclic Static Air Pressure Differential E 631 Terminology of Building Constructions 3 E 632 Practice for Developing Accelerated Tests to Aid Prediction of the Service Life of Building Components and Materials 4 E 1105 Test Method for Field Determination of Water Penetration of Installed Exterior Windows, Curtain Walls, and Doors by Uniform or Cyclic Static Air Pressure Difference E 1643 Practice for Installation of Water Vapor Retarders Used in Contact with Earth or Granular Fills and Concrete Slabs E 1677 Standard Specification for an Air Retarder Material or System for Low-Rise Framed Building Walls E 1745 Specification for Water Vapor Retarders Used in Contact with Soil or Granular Fill Under Concrete Slabs 2.2 Other Documents: ASHRAE Handbook of Fundamentals (1997) Chapter 22: Thermal and moisture control in insulated assemblies - fundamentals. Amer. Soc. of Heating Refrigerating, and Air Conditioning Engineers, Atlanta, GA. ASHRAE Standard 55, Thermal Environmental Conditions for Human Occupancy ASHRAE Standard 62, Ventilation for Acceptable Indoor Air Quality ASHRAE Technical Data Bulletin Vol. 10 Number 3. Rec- ommended Practices for Controlling Moisture in Crawl Spaces, Amer. Soc. of Heating Refrigerating and Air Conditioning Engineers, Atlanta, GA., 1994. Bateman, R. Nail-On Windows: Installation & Flashing 1 This guide is under the jurisdiction of ASTM Committee E06 on Building Constructions and is the direct responsibility of Subcommittee E06.41 on Air Leakage and Ventilation. Current edition approved June 10, 2000. Published August 2000. Originally published as E 241–64T. Last previous edition E 241–90. 2 Annual Book of ASTM Standards, Vol 04.06. 3 Annual Book of ASTM Standards, Vol 04.11. 4 Annual Book of ASTM Standards, Vol 14.02. 1 Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.

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