Chapter 4 Exterior Finish of Walls

Builder 3&2 Volume 02 - Construction manual for building structures
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CHAPTER 4 EXTERIOR FINISH OF WALLS In this chapter, we’ll continue our discussion of exterior finishing. In chapter 3, we covered roof finishing; here, we’ll examine the exterior finishing of walls, including exterior doors, windows, and glass. EXTERIOR WALL COVERINGS LEARNING OBJECTIVE: Upon completing this section, you should be able to identify the types of exterior wall coverings and describe procedures for installing siding. Because siding and other types of exterior wall covering affect the appearance and the maintenance of a structure, the material and pattern should be selected carefully. Wood siding can be obtained in many different patterns and can be finished naturally, stained, or painted. Wood shingles, plywood, wood siding (paneling), fiberboard, and hardboard are some of the types of material used as exterior coverings. Masonry, veneers, metal or plastic siding, and other nonwood materials are additional choices. Many prefinished sidings are available, and the coatings and films applied to several types of base materials may eliminate the need of refinishing for many years. WOOD SIDING One of the materials most used for structure exteriors is wood siding. The essential properties required for siding are good painting characteristics, easy working qualities, and freedom from warp. Such properties are present to a high degree in cedar, eastern white pine, sugar pine, western white pine, cypress, and redwood; to a good degree in western hemlock, spruce, and yellow popular; and to a fair degree in Douglas fir and yellow pine. Material The material used for exterior siding that is to be painted should be of a high grade and free from knots, pitch. pockets, and uneven edges. Vertical grain and mixed grain (both vertical and flat) are available in some species, such as redwood and western red cedar. The moisture content at the time of application should be the same as what it will attain in service. To minimize seasonal movement due to changes in moisture content, choose vertical- grain (edge-grain) siding. While this is not as important for a stained finish, the use of edge-grain siding for a paint finish will result in longer paint life. A 3-minute dip in a water-repellent preservative before siding is installed will result in longer paint life and resist moisture entry and decay. Some manufacturers supply siding with this treatment. Freshly cut ends should be brush-treated on the job. Patterns Some wood siding patterns are used only hori- zontally and others only vertically. Some may be used in either manner if adequate nailing areas are provided. A description of each of the general types of horizontal siding follows. PLAIN BEVEL.— Plain bevel siding (fig. 4-1) can be obtained in sizes from 1/2 by 4 inches to 1/2 by Figure 4-1.-Types of wood siding. 4-1

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