How to install aluminum foam insulation to keep the heat out?

I want to install a 1 sided aluminum foam insulation to keep the heat out. do i install it aluminum side facing the sun or foam side facing the sun?

Aluminum facing the sun, to reflect back the heat.

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One Response to How to install aluminum foam insulation to keep the heat out?

  1. dancer5224 says:

    Aluminum facing the sun, to reflect back the heat.
    References :