Cob: Earthen plaster over plywood siding?

[Carl Vilbrandt]

Peter - The glue was not blood based, but plastic based it however contained
blood.  As of three years ago blood was still used in the mix.   Boise Cascade
plywood could not find a (blood as a sorta substrate connections) replacement.
It seemed the size of the blood platelets gave the surface area necessary for
high strength. ( they said that and I have no idea ).  I wanted to try to get
them to drop the blood from the mix.  Dried blood is so small it is very hard to
handle.   They were spending a lot of money at that time to replace the dry
animal blood material handlers.  They were also reducing the size of the trees
that could be use from a minim of 12 inches to 6 inches.

I worked with the one company that makes most of the glue mixing machines for
the plywood plants in the USA and most of the plants I was told by the glue
salesman were still used blood at that time he said.  He told me that he thought
that one or two were not.......  again not blood based, but blood in the mix
none the less and they all used some type of toxin for fungus and mold.... most
all wood glues and caulking does with few exceptions.
The real problem is what and how much is used does not have to be on the label.
The toxic right to know about building material is very important.

What on earth would replace blood platelets in terms of size other than some bio
substance that was cheap....  I suspect that may be PR mis info is at work....
Do you work at a plywood plant or have you recently been in a plywood plant.....
or do you know a supplier of the materials.  What real practice and stated
practice is are very different.

Thanks for the heads up I will check with some people back at the plant and see
what's up.  Things do change.

Peter Bock wrote:

> Blood based glues are rarely used today.
>
> At 11:19 AM 8/04/2002 +0900, you wrote:
> >Robert   Plywood -- has depending on the glue mixture up to 17 pounds of
> >heavy metal to keep the glue for being eaten by mold and fungi.  The glue
> >mixtures for plywood contain  flour, arsenic, animal blood and a thermal
> >set plastic.  All of the above is bad to cut and or burn.  The amount of
> >plywood tonnage used continues to increase each year.  It is not a
> >sustainable material and its use should be very limited.  It was a bit
> >chilling to come to know that animal blood is a part of plywood and most of
> >the walls of  buildings (using plywood) we all live in are literally coated
> >with it.  It makes you want to believe in the "beast".  I think twice about
> >using plywood now and always wear a mask.  The blood (BSD) makes plywood a
> >bio hazard ..  P.S.  Don't' use sawdust from plywood on the garden  -  Carl
> >
> >Robert B Krueger wrote:
> >
> > > Hi cob list,
> > >
> > > Can anyone tell me if an earthen plaster would work over plywood (it is
> > > actually plywood with wooden bat over the seams)??  There is a moisture
> > > barrier under this plywood.  What are my options for using an earthen
> > > plaster over this building?
> > >
> > > Rob Krueger
> > >
> > > ________________________________________________________________
> > > GET INTERNET ACCESS FROM JUNO!
> > > Juno offers FREE or PREMIUM Internet access for less!
> > > Join Juno today!  For your FREE software, visit:
> > > http://dl.www.juno.com/get/web/.
>
> Peter A BOCK            PH  61 07 38644196
> TSS FIT QUT             FAX 61 07 38641959