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Im almost ready for insulating layer. What should I use vermiculite or perlite. Someone said that perlite has more insulating value. Is that true? I thought I saw that perlite is cheaper than vermiculite at HD.
I used half and half. I found it more workable than the straight vermiculite.
1 part cement to 6 parts vermiculite and 6 parts perlite. Just enough water to make it workable. Mix the water and cement separately then add to the vermiculite / perlite very gently to avoid "breaking down" the particles.