Physics, 25.10.2019 23:43, elenagarcia123

Awell-insulated house should have insulation with an r-value of at least r-19 in the walls
and an r-value of r-30 to r-44 in the ceilings. why is a higher r-value needed in the ceilings?

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Awell-insulated house should have insulation with an r-value of at least r-19 in the walls
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