Core TradesQuestion 209 of 700
A radiant barrier installed in an attic reduces summer heat gain PRIMARILY by:
a.Adding mass that absorbs heat
b.Sealing air leaks in the ceiling
c.Increasing the R-value of the wall insulation
d.Reflecting radiant heat away from the conditioned space
Explanation
A radiant barrier is a low-emissivity reflective surface that reflects radiant heat from the hot roof deck, reducing heat transfer into the attic and living space. It does not work by adding thermal mass, sealing air leaks, or raising wall insulation R-value.
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