Explain the prevention of leakages in flat roofs. How leakages through junctions of walls and sunshades are prevented? What are the steps to be taken to maintain electrical systems. Discuss the...

Explain the prevention of leakages in flat roofs. How leakages through junctions of walls and sunshades are prevented? What are the steps to be taken to maintain electrical systems. Discuss the objectives of construction planning. Explain different stages of planning. What is job planning?