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This guide outlines the standard procedures for the visual assessment and maintenance of exterior dimension stone masonry walls and facades to determine their general condition. The examination procedures established here can help identify and diagnose problems that require repairs or corrective action, but is not intended to be used for buildings requiring major exterior rehabilitation or structural repairs. This guide applies to walls of solid stone or dimension stone claddings with joints usually filled with mortar or sealant that are designed to accommodate structural and thermal movements. This guide specifically excludes the following: dimension stone used in interior building surfaces, flooring, or paving; slate dimension stone used as roofing; thin stone exterior cladding; stone cladding attached to metal flames; the removal of small area stains. Also, this guide may apply, but is not specifically directed, to the following: walls and facades containing semi-dimensions, or partially sized, stone in the form of split-face or rubble; and stone-facade concrete panels. The common problems to consider include rising damps; mortar distresses; surface losses; cracks; displacements, bowings, or bulges; and spalls and fragments. The corresponding repairs to be made that shall address these problems are detailed for each.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
4.1 This guide attempts to provide information to assist building owners and managers with limited knowledge of stone construction to recognize basic problems with performance of facades, and to keep them in good condition through periodic inspections and maintenance. Increased awareness of the behavior of stone masonry facades and associated materials can reduce maintenance and replacement costs by addressing problems and deterioration early.
4.2 The objective of all maintenance should be to limit deterioration through early intervention.
4.3 When it appears damage to stone support elements has occurred, a qualified stone consultant should be employed to evaluate the support conditions, as well as recommend methods to restore the building's integrity and preserve public safety.
1.1 This guide outlines how to visually assess exterior stone masonry walls and facades to determine their general condition. Examining key features of the construction can help identify and diagnose problems which require repairs or corrective action. Such an examination can expose conditions which may be addressed with maintenance and minor repairs, or may require expert assistance. This guide is not intended to be used for buildings requiring major exterior rehabilitation or structural repairs.
1.1.1 This guide applies to walls of solid stone or dimension stone used as a cladding. Stone cladding is typically connected to a backup material with a variety of anchoring methods, including traditional hand-set masonry anchors such as straps, dowels, cramps, hook-and-eyes, dove-tails, wire ties, and the like. Joints between stones in these types of buildings are usually filled with mortar or sealant. Sealant-filled joints are usually designed to accommodate structural and thermal movements.
1.2 This guide specifically excludes dimension stone used in interior building surfaces, flooring or paving, slate dimension stone used as roofing. Though they share some similar assessment and maintenance concerns, thin stone (less than 2 in. nominal thickness) exterior cladding, and stone cladding attached to metal flames are also excluded due to their unique design characteristics and performance requirements. Although procedures and cautions listed herein may apply to walls and facades containing semi-dimension, or partially sized, stone in the form of split-face, or rubble and to stone-facade concrete panels, the guide is not specifically directed to such stone use. It does not address removal of small-area stains.
1.3 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with the judgment of stone restoration design consultants. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given stone consultants service must be judged, nor should this document be applied without consideration of a project’s many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C119 Terminology Relating to Dimension Stone
C1515 Guide for Cleaning of Exterior Dimension Stone, Vertical And Horizontal Surfaces, New or Existing
E1971 Guide for Stewardship for the Cleaning of Commercial and Institutional Buildings
ICS Number Code 91.060.10 (Walls. Partitions. Facades)
UNSPSC Code 11111600(Stone)
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ASTM C1496-18, Standard Guide for Assessment and Maintenance of Exterior Dimension Stone Masonry Walls and Facades, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top