I created a little "marine service company" so I could buy direct from
several distributors. Bought direct from Soundown http://www.soundown.com/.
They are the best but a bit pricy as they work primarily in the marine
market. They do have a couple of manuals on line with lots of technical
information.

A more industrial oriented site is http://www.soundprooffoam.com/. They
have a 1" thick 1 lb/ft barrrier on line price about $115 for a 4x8 sheet.
It comes rolled so it can ship UPS. Not quite as effective as Soundown but
about the same price as you were planning to spend for lead.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

"Ignoramus1606" wrote in message
...
On Thu, 20 Jan 2005 23:58:24 -0500, Glenn Ashmore
wrote:
I am using SoundDown in my engine room. It and Whispermat are the
standard
sound insulation for marine engine compartments. Panda, Onan and other
genset makers use it in their cabinets. Basicly they are 1/2 to 3/4" of
PVC
acustical foam either side of a 1 lb/ft lead filled vinyl sheet. It is
appiled with spray on adhesive and welded or epoxied spikes and caps.

Are you talking about "Barrier Composite Insulation" or some other
type of insulation. They have a lot of choices. What was the retailer
whom you used?

The general recomendation is to design baffel boxes so that the air has
to
make at least one 180 turn so there is no direct path and the baffel
should
be lined with the acustical barrier. Being cooled by a seawater heat
exchanger my diesel doesn't need quite that much vent area but here is
an
example. The 28"wide x 6"high vent is on the back wall of the engine
compartment. The baffel box is 30"D x 8"H x18"D. It is oversize
because
the first chamber is lined with 1.25" sound barrier. (I hope this comes
out
in fixed width font.)

I got it. Thanks.

+----------------+
| |
| | |
| | Vent
| +--------+
Engine Compartment



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