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Frame house covered with stucco - wall R value

Vad
Vad Member Posts: 55
in THE MAIN WALL
Hello,

Stucco siding was done couple of years ago to cover frame house. Stucco has about 1'' foam in it. I do not know if there is any insulation at the house's walls. I do not know exactly what kind (make) of stucco it is as well.

  For Heat Loss calculation, Is it safe to count combine wall R value (together with stucco) equal to 10? As I understand stucco alone with 1'' foam can be about R4

Thank you,

Vad
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