Old 11-13-2010, 07:23 PM
Join Date: Oct 2010
Location: new zealand
Posts: 62
Default Perlite / vermiculite mix

Hi there

I did a 2.5 part perlite, 2.5 part vermiculite to 1 part cement mix. I made what I thought was an oatmeal slurry. It feels quite brittle at present, is this normal? will it hold the bricks on top without crushing? I have attached a pic.

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Perlite / vermiculite mix-insulation-floor.jpg   Perlite / vermiculite mix-insulation-floor-close-up.jpg  
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Old 11-13-2010, 07:31 PM
Join Date: Oct 2005
Location: Gilbert, AZ
Posts: 423
Default Re: Perlite / vermiculite mix


After it has cured for several days, it will be fine. If it feels slightly spongy after a couple of days, that is normal. I had to extend my pad a few inches due to, uh, designer error. I poured the extension on Thursday and had my bricks on it Friday. Please keep in mind that the original pad was still there, just not enough to support the bricks by themselves.
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Old 11-14-2010, 03:06 PM
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Il Pizzaiolo
Join Date: Oct 2006
Location: Vancouver Island
Posts: 1,374
Default Re: Perlite / vermiculite mix

Looks fine Kriso. Keep it damp for at least 7 days.
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