Question re foam building construction

B

bob Petritsch

Active member
Recently went to a restaurant with a fancy exterior walls. They looked like concrete. Someone had backed up and damaged a section. It was foam underneath. Over the foam there was a cloth product and the external covering.
Anyone know what the process is. Looked like it could be used to make some decoys.
 
I believe the product was called Driveit or Drivit or Drive It or something like that I tried it on Herters decoys a few years ago , eh... not so much.
 
2" foam is a pretty common underlayment for Dryvit/stucco. Not sure if you would want to use it for decoys, if you got it to the thickness needed to make it stable and not crack it would be really heavy. Here's how it's applied to a building-
http://theandrewagency.com/wp-content/uploads/2014/12/Dryvit-Outsulation-X.gif

The tile mastic and burlap method works pretty well for foamers but it's quite messy and takes weeks to dry before you can paint it. It does make for a solid decoy though!
 
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Good morning, Cody~

I agree with your thoughts about mastic + burlap - I am hoping I've burlaped my last bird....

However, IF one has a heated shop, I have found they cure very quickly with dry wood stove heat nearby. Hot, humid summer air is a whole different kettle of fish.

All the best,

SJS
 
That's a good tip Steve! I'm a tile guy and I personally hate mastic, I won't use it anywhere except maybe a on a backsplash with mosaic sheets. The super long dry time is one reason that it's awful for anywhere that needs structural integrity, I have seen 12x24 floor tiles installed with mastic that still had uncured mastic in the center a year after they were installed.
My favorite finishing method for foamers is to have some bodies pre-carved, and when I'm working on boats if I have any epoxy left over I'll give my foamer bodies a coat and restle coat them with some sawdust. An epoxy shell is strong and lasts forever!
 
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