Insulation composed of small nodules that contain voids or hollow spaces. Granular insulation may be calcium silicate, diatomaceous earth, expanded vermiculite, perlite, cellulose, or microporous insulation.
Insulation composed of small nodules that contain voids or hollow spaces. Granular insulation may be calcium silicate, diatomaceous earth, expanded vermiculite, perlite, cellulose, or microporous insulation.