Although this method of laying over the attic floor won t lower the temperature of your attic space it will still reflect up to 97 of the radiant heat that strikes its surface thereby reducing heat transfer from the attic to living spaces resulting in lower utility bills.
Reflective foil in attic.
A secondary method of installation instead of installing under the attic rafters is to lay the foil insulation over the attic floor.
Yes but a foil product will work much better than a radiant barrier paint ceramic paint additive or micro spheres.
If installed on top of attic floor insulation the foil will be susceptible to dust accumulation and may trap moisture in fiber insulation so it is strongly recommended that you not apply radiant barriers directly on top of the attic floor insulation.
Note that reflective foil will conduct electricity so workers and homeowners must avoid making contact with bare electrical wiring.
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Northern california s different temperatures prompt many homeowners to install reflective foil in the attic to preserve the energy.