8. Finishing worksReciprocity involves giving back to the community, whether through sharing findings, providing resources, or contributing in meaningful ways.pptx

Reciprocity involves giving back to the community, whether through sharing findings, providing resources, or contributing in meaningful ways. Transparency about research goals,

1. 1 ADDIS ABABA SCINECE AND TECHNOLOGE UNIVERSITY College of Engineering Department of Civil Engineering General workshop practice (CEng2110 ) 8.Finishing works Learning Outcomes(CLO): After completion of this chapter, students will be able to : Identify the activities process involved in Plastering and pointing, Tiling (for floors and walls), Skirting , Ceiling , and Painting works Lecture material by: Zemu Gina AASTU , Addis Ababa Ethiopia March 2024

2. Introduction to Building Finishing works 2 Building finishes comprise of plastering, pointing, painting, varnishing, white/colour washing or distempering. These finishes are performed to satisfy the following functions: These finishes primarily form protective coating to the exposed surface . This implies that the finishes preserve and protect the materials and thereby increase the life span of the materials . These finishes add to the aesthetic view of the building and form a sort of decorative item . Plastering is performed in majority of the cases and pointing is preferred in stone masonry and brick-masonry built by machine-moulded bricks . Painting, varnishing, white/colour washing or distempering are applied to different type of materials which give a protection to the adverse weather and at the same time adds to the beauty of the building.

3. Plastering Plastering is the process of covering rough walls and uneven surfaces in the construction of houses and other structures with a plastic material, called plaster, which is a mixture of lime or cement concrete and sand along with the required quantity of water . Plastering is the method of covering rough and uneven surfaces of the various components of a building with a plastic material, i.e., mortar which is called the plaster . Mortars are used in masonry for joining stones, bricks, blocks etc. and plasters are used for rendering on the outside and inside of walls. The differences between mortar and plaster lie in the capacity of plasters to take better finish, which depend to a very large extent on the type of sand used in the mix. Based on precedence of coatings : 1st coat plastering :Cement mortar plaster, 2nd coat plastering : Cement mortar plaster and 3rd coat plastering: eg . Quartz painting for exterior surfaces of exterior walls whereas gypsum plastering for Interior surfaces of walls Some of the external finishes are Sand-faced finish, Pebble-dash finish, Rough-cast finish, Scrapped finish, Smooth-cast finish, Textured finish, Depter finish and Machine-applied finish. 3

4. Pointing 4 Pointing: the technique of reshaping mortar joints between bricks or other masonry elements. It is the process of finishing mortar joints, whether it is brick masonry or stone masonry. The advantages of pointing work - Improve structure integrity of the building structure. - Provide weather proof external walls. - Restore overall building appearance. - Maintain or significantly increase the overall value of your home or property - Reduce any ongoing maintenance on your brickwork The disadvantages are: - Time consuming, - Requires a skilled mason

5. Painting Work 5 Paints are coatings of fluid materials which are applied as a final finish to surfaces like walls, ceiling, wood and metal works . Types of paints : Enamel paints, Cement paints, Oil paints, Cellulose paints, Aluminum paints, Emulsion paints (Synthetic resins), Anticorrosive paints, Synthetic rubber paints Painting is done to protect the surface from the effects of weathering, to prevent wood from decay and metal from corrosion, to provide a decorative finish and to obtain a clean, hygienic and healthy living atmosphere. Varnish is primarily used only for wood work. For decoration purposes it is also used on stone and brick facings. To protect the surface from weathering effects of the atmosphere and the actions by other liquids, fumes and gases. To prevent decay and corrosion in metal. To give good appearance to the surface. To provide a smooth surface. The purposes of painting can be:

6. Painting Work… 6 White/color washing or distempering : Methods of painting: Depends on the type of painting tool used, purpose and number of coatings . Based on tools:- - Brush Paintings, - Rag Roll painting, - Spray painting , etc. Based on purpose and number of coating: Primer painting 1st , 2nd , …coat painting Decorative painting, etc

7. Skirting Work 7 Skirting is basically a board that runs along the border between the interior wall and the floor. It covers the improper edges, avoids scratches from furniture and gives a room a good finish (aesthetics). Its purposes can be: Hide exposed electrical wiring, cover the gap between the walls and floors, avoids marks from furniture as well as beautification. Based on Materials  Metal skirting board  Marble skirting board  Wooden skirting board  MDF Skirting board  PVC skirting board

8. Tiling Work: For floors and walls 8 Tiles in building construction are thin plates or elements used to cover surfaces like roofs, floors, and walls. Types of tiles and their applications are discussed. Tiles in the present scenario are a primary element in bringing building interior as well as exterior finishing and beauty. Tiles can be manufactured from a wide range of substances, both hard (e.g. ceramic, porcelain, stone, marble, clay, slate, glass, etc .) Types of Tiles:  Marble Tiles  Granite Tiles  Ceramic tiles  Porcelain Tiles  PVC Tiles

9. 9 Ceiling Work Ceilings are often used to hide floor and roof construction. They have been favourite places for decoration from the earliest times: either by painting the flat surface, by emphasizing the structural members of roof or floor, or by treating it as a field for an overall pattern of relief . In addition to providing an interior finish, ceilings also fulfil other functions ranging from acoustic conditioning or thermal insulation to reducing the scale of rooms and concealing structural elements, unevenness or installations to conceal irregularities in ceilings . Ceiling materials include fiberglass, metal, mineral fiber , polyvinyl chloride (PVC), gypsum board, and thermoplastic . The eight most common types of false or suspended ceiling materials are : Plaster of Paris (POP), Wood or plywood, Gypsum, Metal, PVC, Fabric or cloth, Mineral fiber , and Glass .

10. 10 Suspended ceiling systems Suspended ceilings (also referred to as dropped ceilings, drop ceilings or false ceilings) are secondary ceilings suspended from a structural floor slab above, creating a void between the underside of the floor slab and the top of the suspended ceiling.

11. Suspended ceiling systems … 11

12. 12 Suspended ceiling systems …

13. 13 PVC suspended ceiling system

14. 14 Dado false ceiling and POP work Gypsum board or Plaster of Paris (POP) ceiling work Available in powdered form, the paste is made to design the ceiling. The paste made mixing the powder with water is applied to chicken mesh for it stay afloat. Plaster of Paris (POP) is a building material having hard substance Gypsum as its main component. It is used for coating walls and ceilings and also for creating architectural designs.

15. The End! Thank You!! 15