Description
This guide provides information on the plastering process, including prequalification of materials, plaster tool and equipment suggestions, mixture proportions, application procedures, finish types, and troubleshooting and repair. This guide is intended for architects, engineers, designers, specification writers, contractors, plasterers, laboratory personnel, and public authorities. Portland cement-based plastering processes and properties differ in many ways from those used in the concrete trade. The equipment used to mix plaster, the methods of curing, preparation of substrates, mixture design components, material application, finishing techniques, and methods of controlling cracking are only applicable to plaster and are not appropriate for concrete. Likewise, literature specific to concrete trade practice should not be assumed exchangeable or applicable to common plastering trade practice. Differences in plastering terminology are of key importance and, therefore, an extensive list of them is provided in this guide.
Keywords: base; bonding agents; brown coat; cracking; finish coat; fresh plaster; furring; hardened plaster; scratch coat; sheathing; stucco; texture.
Table of Contents
CHAPTER 1—INTRODUCTION AND SCOPE
1.1—Introduction
1.2—Scope
CHAPTER 2—DEFINITIONS
CHAPTER 3—DESIRABLE PROPERTIES OF PORTLAND CEMENT-BASED PLASTER
3.1—Fresh plaster
3.2—Hardened plaster
CHAPTER 4—PORTLAND CEMENT-BASED PLASTER MATERIALS
4.1—General
4.2—Cements
4.3—Lime
4.4—Aggregates
4.5—Water
4.6—Admixtures
4.7—Fibers
4.8—Bonding agents
4.9—Polymers
CHAPTER 5—DESIGN CONSIDERATIONS FOR PLASTER BASES
5.1—General
5.2—Ceilings
5.3—Spacing considerations for supports
5.4—Sheathing
5.5—Stress relief
5.6—Design considerations for reduction of water intrusion
5.7—Plaster sustainability
CHAPTER 6—METAL LATH PLASTER BASES
6.1—Lath
6.2—Water-resistive barrier
CHAPTER 7—LATHING ACCESSORIES
7.1—General
7.2—Outside corner reinforcements
7.3—Inside corner accessory
7.4—Casing beads
7.5—Screeds
7.6—Stress-relief joints
CHAPTER 8—METAL LATH INSTALLATION
8.1—General
8.2—Installation of metal lath plaster base
8.3—Attachment of metal lath to framework
8.4—Attachment of metal lath to solid base
CHAPTER 9—SOLID SUBSTRATE PLASTER BASES
9.1—Substrate preparation
9.2—Concrete
9.3—Concrete masonry
9.4—Clay masonry
9.5—Surface-applied bond coatings
9.6—Surface-applied bonding agents
9.7—Integrally mixed bonding agents
CHAPTER 10—PROPORTIONING AND MIXING OF PORTLAND CEMENT-BASED PLASTER
10.1—Mixture proportions
10.2—Batching and mixing
CHAPTER 11—APPLICATION OF PORTLAND CEMENT-BASED PLASTER
11.1—Approval and acceptance of plaster base
11.2—Plaster application
11.3—Application of coats
CHAPTER 12—PLASTER FINISHES
12.1—General
12.2—Color finishes
12.3—Finish-coat textures
CHAPTER 13—CURING
CHAPTER 14––PAINTS, SEALANTS, AND CAULKING MATERIALS
14.1––Paints
14.2––Sealers
14.3––Sealants and caulking
CHAPTER 15—TESTING
15.1—General
15.2—Evaluating materials
15.3—Test methods for evaluating hardened plaster
15.4—Evaluating workmanship
CHAPTER 16—TROUBLESHOOTING AND REPAIR
16.1—General
16.2—Cracking
16.3—Weak plaster
16.4—Debonding and delamination
16.5—Discoloration of plaster
16.6—Long-term deterioration
CHAPTER 17—REFERENCES
Authored references