➤ A building receives
most of the heat through roof by radiation. 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