ADAMA SCIENCE AND TECHNOLOGY UNIVERSITY SCHOOL OF CIVIL ENGINEERING AND ARCHITECTURE CONSTRUCTION TECHNOLOGY & MANAGEMENT PROGRAM Course title: Building Construction Course code: CEng 3205 Lecturer: Natnael Fantu Program: 3 rd year Architectural Regular Academic year: 2018/19 Semester: 1 st semester Feb. 2019
ASTU Building Construction By: Nati CHAPTER TEN FINISHINGS Instructor: Nati Mar. 2019
ASTU Building Construction By: Nati 10. FINISHINGS 10.1. INTRODUCTION Building finishes are used to give protective coating to the surface which preserves and protects the materials used in building from weather effects such has rain water, heat, frost, etc . and to provide decorative finishes which add to the appearance of the material surfaces and building as a whole. Plastering , pointing , white washing and color washing , painting , varnishing , and distempering , etc. are among the various types of building finishes.
ASTU Building Construction By: Nati SURFACE FINISHING The art of treating the surface of building materials with a suitable covering material to make them weather resisting and decorative is called surface finishing . The covering material used for surface finishing are called surface finishes which are plasters, paints, washes, tiles etc. PURPOSE To protect the surface from the effects of weathering agencies. To provide a smooth surface . To provide pleasing appearance to the surface.
ASTU Building Construction By: Nati IMPORTANT TECHNICAL TERMS Background : The surface to which first coat of plastering is applied is called background . Dubbing Out : The filling the hollow spaces of the back ground before applying the plaster is called dubbing out . Finishing coat : The final layer of the surface finish is called finishing coat. Hacking : The process of making the background rough to act as key for plastering is called hacking . Gauging : The mixing of various constituents of plaster is called gauging. Rendering coat: The first coat of plastering is called rendering coat .
ASTU Building Construction By: Nati Under coat: The layer providing base for the application of remaining coats is called under coat . Floating: The process of providing a finishing coat with a float is called floating . Peeling : The removal of the plaster from the background is called peeling . Blistering : The local swelling of a finished plastered or painted face is known as blistering . This is due to lack of adhesion of the plaster or paint with the surface. Cracking : The development of angular fractures or cracks in a plastered surface is called cracking . In case of painting it indicates the presence of a soft under coat.
ASTU Building Construction By: Nati Checking : The longitudinal split in a painted or plastered surface is known as checking .
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- Building materials, plaster, Plasterwork