[papercreters] Re: Cellulose Insulation

I use bales of cellulose because they are very convenient (compressed, dry, ready to mix). In my formula I use about 1/3 of a bale (which cost about $8-9 around here) and one bag of portland, along with about 5-7 cubic feet of EPS beads to make one batch of fairly stout EPIC. Adding more EPS will give more volume but less strength.

The blown cellulose fiber is treated with boric acid which reacts with the portland to give off a nasty ammonia smell so its not suitable for indoor use. I use either a gas powered (towable) mortar mixer or an electric hand held mortar mixer, depending on how many batches I need to make.

A set of pictures of the dome built from this material is here: http://groups.yahoo.com/group/papercreters/photos/album/861895350/pic/list



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