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Old 07-27-2009, 09:14 AM
Serf
 
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Default portland cement to vermiculite

whats the mix ration porland cement to vermiculite for the below floor isalation layer.
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Old 07-27-2009, 09:45 AM
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Default Re: portland cement to vermiculite

complete instructions:

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Old 07-27-2009, 09:52 AM
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Default Re: portland cement to vermiculite

Some have used ratios as rich as 5 to 1 and many of us have used 9-10 to 1. I used 9+ to 1 using the slurry method (cvduke's method) and had no problems using that lean a mix. Do a search with "cvduke" in the search box and you should get his thread on the method.

The leaner the mix the better the insulation value for a given thickness.

Hope that helps,
Wiley
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