Heat moves in and out of your home (or about any other structure) in four ways: by conduction (which R-Value measures), and by convection, radiation (which S.R.I value measures) and air infiltration. Hence a minimum R value of 2.1 or 3.5 is specified by ECBC. Combination of S.R.I and R value will give the best & everlasting terrace. Roof Tiles offers solution for R value also
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