Radiant barriers might or might not show large Visible reflectivity. Though reflectivity and emissivity will have to sum to 1 in a supplied wavelength, reflectivity at just one set of wavelengths (noticeable) and emissivity at another set of wavelengths (thermal) will not automatically sum to one. Pumping or 'blowing? bulk https://lanetpnno.wikilinksnews.com/3806804/top_residential_insulation_contractors_secrets