On Jun 8, 2010, at 4:59 AM, Tony Renshaw wrote:
> I am after advice on stiffening bulkheads in my tunnel, now that I
> have opened it up at the top to gain access to finger brake shelf
> etc. Like all of us, I have blue foam coming out of my ears, but
> I've also used ply as a substrate here and there, and I know about
> light weight composite substrates like Divinycell. So, does anyone
> speak positively about using a specialised foam substrate instead of
> blue foam with BID either side, or should I just use ply, or is even
> good old blue foam good enough???
Tony,
Personally, I would never use blue foam where thin sheets are called
for, even if I could make a simple jig and sand it down to say 1/8" or
1/4". For what you describe, I would find some LastaFoam...however,
since the amount you're talkin bout is so small, I would think 1/8"
birch acft plywood would serve.
Fred
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