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If pool crete is just perlite and Portland cement then yes, otherwise no. You want just perlite or vermiculite and portland without any other aggregates for maximum R value. If you have a large percentage of sand or other filler it will transfer the heat to fast. There are several threads here where people even want to limit the amount of Portand cement used to boost R value. I would stick with the recipe in the manual. It not hard to mix because the stuff is so light. If you have a mixer its a breeze, if you have to mix in a tub its still not that bad when compared to mixing concrete.
The value of mixing your own vermiculite and portland cement is that you control the proportions and resulting R value. After reading through the many threads here regarding vermiculite-to-cement ratios, (from 5:1 through 11:1) I decided on an 8:1 ratio for a little bit higher insulation value and because the sides of my insulating layer would not be exposed. The 8:1 mix was easily mixed in a wheel barrow (gently!) like folding egg whites into waffle batter only on a larger scale. I placed 2" of Insboard 19 on top of 3 1'2" of vermicrete and the resulting compressive strength of the install turned out solid as ever.
Hi Guys, just jumping in with a question, Is perlite and vermiculite the same? I thought they were different. I thought perlite was like whitish pelllets and vermiculite was the stuff in pool bases. If they are different is one better then the other?
The perlite we get here tends to abrade with mixing more than vermiculite. It is a slightly better insualtor, ie it is slightly less dense,but the difference is marginal. I prefer to use vermiculite because it contains less dust than perlite, which I find irritating to inhale.
PRODUCT NAME: Pool-Krete
GENERAL USE: To provide a firm, protective foundation for vinyl pool liners.
PRODUCT DESCRIPTION: A blend of Portland cement, aggregates and additives to
enhance performance and workability.
the aggregates are sand from what i have read , correct me if im wrong ,but that will not make a good insulator as it will transfer heat and that cancels out the vermiculite.