In response to your statements about plaster cloth over Styrofoam. I have
used both methods (plaster cloth or without). When applying rock moulds to
vertical surfaces I find that I get a stronger bond using plaster cloth.
Actually, you cannot use the method of attaching rock castings I mentioned
without it.
Your second point is very interesting. I've been in the construction
industry for most of my life and have done a lot of restoration work.
Plaster is applied to a layer of wire mesh which is fastened to wallboard or
wood lathe in many old homes, etc. Wallboard does not allow moisture to pass
through it so why isn't there a lot of mould growing in these old houses. I
have never seen any sign of mould as a result of using plaster against a
solid backing. By the way, technically, Styrofoam does allow air
penetration. That's why you can glue the stuff with adhesives that require
air to set up and dry.
The original posting that I responded to (don't have it any more and can't
remember the name of the gentleman!) stated that he didn't like carving
Styrofoam. Plaster cloth does allow for some shaping of terrain as you place
it. Also, I have never had any problem planting trees etc. in the plaster
cloth, just make sure that the pin at the bottom of the tree is sharp and it
will go through the cloth with no problem.
Manfred L
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