[Cob] AE & Rub-R-Slate foundations and waterproofing

[dirtcheapbuilder-Charmaine Taylor]

On Oct 31, 2005, at 5:46 PM, Amanda Peck wrote:

> http://www.epdmcoatings.com/
>
> Could the same thing be done with asphalt emulsion?  That does tend to  
> be inexpensive.
>


AMANDA, straight AE gets very hard when laid down in thin layers, and  
may crack I would suspect.    there are many formulations sold as roof  
and basement coating, put on with a brush, the stuff is very low  
processed tar- bentonite clay and some fibers ( prolly nylon  type)    
it is cheap 5 gallons is $22. here, but lower in bigger cities.
   regular AE:   FIRE FIGHTING MEASURES  FLASH POINT:  Water-based, not  
applicable.  Will not burn until cured.


If clay is added to the AE mix, with some fiber, say paper or  
cellulose, etc... then it is more rubbery..hence Rub-R-Slate, which  
will  conform to any shape, edge, etc as the other stuff.


With the liquid rubber- the  VOCs . Naptha, and the flammability of it  
is a concern. and  very low flash point 115F  ( I means, isn't a hot  
tub 112 deg? The hot tub industry states that 109 degrees F is the  
maximum temp that a spa should be set to)   really scares me.  once  
applied it is prolly just fine.  the catalyst is Stoddard solvent...  
smelly stuff...http://www.atsdr.cdc.gov/tfacts79.html

I've used the Jack Bay's Rubberslate recipes with regular  AE  ( non  
toxic    Black Jack or Henry 107  
http://www.alliedbuilding.com/products/productDetail.asp? 
ProductID=18380170   brand, fibered) and mixed with clay and sand,  
paper pulp and been very happy. sawdust works great too.

for the curious her is a link to the info on it at  my site.     
http://store.yahoo.com/dirtcheapbuilderbooks/rubles.html

Home made stuff can do the job, but the    super flat look of the EPDM  
rubber is attractive too.
>
Charmaine Taylor Publishing
   www.paperartists.com
PO Box 375 Cutten CA  95534 USA  707-441-1632
www.dirtcheapbuilder.com    www.papercrete.com