Thursday, May 22, 2008

Re: [papercreters] PC insulating board -mix question

The panels are difficult. I've done 4' x 8' using 4" thickness and it was quite a learning curve to generate 100 good panels that didn't break.


Portland mix to paper should be no less than 1:1 by dry weight.

I used salt cedar as reinforcement, you can try other things, but in general papercrete will shrink away from everything, but itself.

Definitely two or more people to move a 4' x 8' by 5" panel. 

I did a 300' fence using these panels - never again :). I traded my extras rest for a broken golf cart. Total cost of materials and labor was about $30 a running foot. Would have been a lot cheaper to do slip form, block, spray, or pump.

You don't need to use a real stucco. I used a paper stucco with higher portland content, then sprayed the whole thing with roofing sealer. Now I think I prefer lime washes. Lots of options to seal papercrete latex or acrylic paints are fine if you don't want the papercrete to breath. 

These videos will help.


On May 21, 2008, at 11:58 AM, sheelakasha wrote:

Hi all
I wish to cast 4'x8' or 4'x4' boards 4" thick that will provide
insulation & be placed on the outer side of a dry climate house. The
boards will be attached with screws and actually are replacing 2"
Styrofoam boards. after placing, will be stuccoed.
questions are:
1. what is my min Portland in the mix (since I want it insulative)?
what mix do you think is optimal for insulating purposes?
2. are there any materials that can harden the boards (not chicken wire)?
3. do you think 1 person can handle 4'x8'x5" if the mix is light? if
so can  he\she handle a 4'x8'x8" one?
4. HAS ANYONE TRIED TO USE PC IN THIS MANNER? or even for insulative
bricks?
5. about the stucco, what mix should i use in dry climate (20 mm rain
max- draught for 3 yrs now) or is it even necessary? 


waiting for replays while munching on fresh beautiful early summer
mulberries...

thanx all experts for all the help & info.



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at 6:58 PM