Roofing

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Roofing

  1. 1. 1. 2. 3. 4. 5. 6. 7. INTRODUCTION ALUMINIUM SHEET a) PRORETIES b) DESIGNS AND COLOUR c) APPLICATIONS d) COST GALVANIZED IRON SHEET a) PRORETIES b) DESIGNS AND COLOUR c) APPLICATIONS d) COST ALUMINIUM SHEET a) PRORETIES b) DESIGNS AND COLOUR c) APPLICATIONS d) COST COMPARISION INFERENCES REFERENCES
  2. 2. Galvanised iron Galvanized iron, formerly, iron coated with zink by electrical deposition; now more commonly, iron coated with zink by plunging into a bath of melted zink, after its surface has been cleaned by friction with the aid of dilute acid. Galvanizing is a process of coating iron or steel with zinc in order to provide greater protection against corrosion for the iron or steel base. The process of galvanizing is named after 18Th century itallian scientist galvani. • • • • • • • • • Features :Made up of rust resistant galvanized steel High durability Special metallic coating Light weight High strength steel Resistant to high temperature Corrosion resistant Easy to install
  3. 3. Galvanised iron sheet The galvanized iron sheet are prepared by pressing flat wrought iron plates between rollers with grooves or teeth then they are galvanized with zinc . Corrugation helps to increase the strength and rigidity They permit easy flow of rain water Available in varying length 1.2m to 3.6m Width 600-1200 These sheets are economical and fire resistant.
  4. 4. FEATURES OF G.I. SHEET
  5. 5. VARIOUS PROFILES OF G.I. SHEETS
  6. 6. VARIOUS PROFILES OF G.I. SHEETS
  7. 7. DIFFERENCE BETWEEN G.I., A.I. & AC SHEETS S.N. A.C. SHEET G.I. SHEET A.I. SHEET 1. BREAKABLE AND REQUIRES MORE CARE IN HANDLE. NON-BREAKABLE AND CAN BE HANDLED WITH LITTLE CARE. NON-BREAKABLE AND CAN BE HANDLED WITH LOW CARE. 2. CAN NOT MADE AS THIN AS G.I. SHEET CAN BE MADE VERY THIN SHEET CAN BE MADE VERY THIN 3. CHEAP IN INITIAL COST HIGH IN INITIAL COST COSTLY THAN A.C. SHEET CHEAPER THAN G.I. SHEET 4. DO NOT CORRODE EASILY CORRODE BY ATMOSPHERIC ACTIONS DO NOT CORRODE 5. FIRE RESISTANT NON FIRE RESISTANT DEFORMES WHEN FIRE OCCURES NON FIRE RESISTANT DEFORMES WHEN FIRE OCCURES 6. HEAVY IN WEIGHT LIGHT WEIGHT LIGHT WEIGHT 7. LESS NOISY NOISY LESS NOISY 8. MAINTENANCE COST NIL MAINTENANCE COST DUE TO PERIODIC PAINTING TO RESIST THE CORROSION MAINTENANCE COST NIL 25-30YRS WITHOUT MAIMTENANCE 9. NOT AFFECTED BY ACIDS AND FURNS AFFECTED BY ACIDS AND FURNS 10. SOUND PROOF NOT SOUND PROOF SOUND PROOF
  8. 8. CLIP LOCK PROFILE
  9. 9. APPLICATIONS-
  10. 10. INSTALLATION PROCEDURE-

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