The very first issue you will have to fully grasp is that a roofing contractor is in business enterprise is to set up and replace roofs. Roof repairs are a incredibly modest element of his business enterprise, which brings him the least amount of profit. In a lot of situations, irrespective of whether to replace or repair is incredibly borderline, and you can bet that most roofing contractors will recommend replacement.
The 1st and most vital process is the waterproofing of the selected location. Buildings not older than 30 years that are RCC (Reinforced Cement Concrete) structures can be viewed as for a terrace garden. To commence with, the slab porosity is checked (for leakage) and accordingly actions are taken for waterproofing. At weak points, pressure grouting is done i.e. holes are drilled into the RCC slabs and by means of nozzles cement neat slurry is forced into them. Foam is formed and this fills all the holes, making the concentration of the slab denser.
Hence it seems for the roof we definitely need two barriers- against heat and against water. The traditional strategy has been to give a lime terracing (100 to 200 mm thick) comprising of lime, surkhi and brick bats along with a lot of indigenous admixtures- each organic and inorganic. Such a layer functioned to deliver each courses of weathering course- the insulation portion and the water proofing part the top level of the course being so adjusted to have the water flow freely into the drain outlets.
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