1#KochFord 6 j2 ^4 P0 Z: y/ v5 Z; oThe higher R value, The better insulation performance.$ k) ]/ z$ {/ a& J9 }
In winter, the hot air always floats up due to thermal buoyancy, so R value for the roof is normally higher than that for exterior wall.! r0 `# X8 i3 n' n
Hope my answer helps.