I have an early 70s 27 foot sailing boat with a single cylinder 10HP
Yanmar diesel. This is in a box formed of 1/2" ply on each side with a
removable front and lid. The current soundproofing seems to be some kind
of foam or mat held in place by perforated hardboard. What suggestions
to people have rather than paying £50 per sq m for a lead sandwich foam?

Regards,
Jerry

1973 Marcon Sabre 27 bilge keel
Plymouth, UK

Accoustic ceiling tiles

(The Floating Bear) wrote:

I have an early 70s 27 foot sailing boat with a single cylinder 10HP
Yanmar diesel. This is in a box formed of 1/2" ply on each side with a
removable front and lid. The current soundproofing seems to be some kind
of foam or mat held in place by perforated hardboard. What suggestions
to people have rather than paying £50 per sq m for a lead sandwich foam?

Regards,
Jerry

1973 Marcon Sabre 27 bilge keel
Plymouth, UK

grandma Rosalie

"Rosalie B." wrote in message
...
Accoustic ceiling tiles


Ouch! They are normally covered with a combustible vinyl/plastic film on
one side. Not good for soundproofing an engine cover/box. ;-)

JimH wrote:
"Rosalie B." wrote in message
...

Accoustic ceiling tiles



Ouch! They are normally covered with a combustible vinyl/plastic film on
one side. Not good for soundproofing an engine cover/box. ;-)

I don't see what the problem is with rigid foil backed foam. Here in the
US you can get a 4'X8' sheet of 1" foil on both sides polycyanourate for
about $30.


--
Stephen

-------

For any proposition there is always some sufficiently narrow
interpretation of its terms, such that it turns out true, and
some sufficiently wide interpretation such that it turns out
false...concept stretching will refute *any* statement, and will
leave no true statement whatsoever.
-- Imre Lakatos

" JimH" jimh_osudad@yahooDOT comREMOVETHIS wrote:


"Rosalie B." wrote in message
.. .
Accoustic ceiling tiles


Ouch! They are normally covered with a combustible vinyl/plastic film on
one side. Not good for soundproofing an engine cover/box. ;-)

I don't mean the suspended ceiling ones, but the ones they use for
recording studio walls - solid square tiles.


grandma Rosalie

I looked at that and it is not very sound protective. The lead stuff is
just real heavy.

I was at the Miami boat show a few years back and saw something like
the lead line stuff that was not so heavy and something like 3 or 4
times as good but it was also about that much more money.

i would love to find someting myself so if you figure it out, post it.

The Floating Bear wrote:
I have an early 70s 27 foot sailing boat with a single cylinder 10HP
Yanmar diesel. This is in a box formed of 1/2" ply on each side with a
removable front and lid. The current soundproofing seems to be some kind
of foam or mat held in place by perforated hardboard. What suggestions
to people have rather than paying £50 per sq m for a lead sandwich foam?

Regards,
Jerry

1973 Marcon Sabre 27 bilge keel
Plymouth, UK


Make sure the box is airtight except for baffled / convoluted openings
to let air in/out. Sound is like water - a little opening and it
leaks right through.

Replace the engine mounts if worn out - are they still soft? Is the
engine bottoming out on them?

Don't pay for sound insulation at the chandlery. Find industrial
sources of sound insulation.

Evan Gatehouse

Don't pay for sound insulation at the chandlery. Find industrial
sources of sound insulation.

Suggestions? Dealers or what to look for?
I see lots of listings but "engine room" not a common choice.

thnx