"JoeSpareBedroom" wrote in message
...


Hang on tight! Sudden left turn: Does anyone make aluminum hulls in the
30-ish foot range? If not, why not? Please provide a 3 page essay, single
spaced.

Yes.

"Eisboch" wrote in message
...

"JoeSpareBedroom" wrote in message
...


Hang on tight! Sudden left turn: Does anyone make aluminum hulls in the
30-ish foot range? If not, why not? Please provide a 3 page essay, single
spaced.

Yes.


You get an A minus.

Harry Krause wrote:
BTW, no matter what anyone tells you or what you read, if you see
evidence of osmotic blistering on a boat you are thinking of buying,
move on.

Depends on the boat, depends on the blisters.


Chuck Gould wrote:
Please do tell how the typical gelcoat blisters found on most used
boats have a "far greater impact" than cosmetic.


I dunno about "far greater" impact, but one certainly sould
not take it for granted. After all, a fiberglass boat has a
great deal of structural integrity depending on the skin.
That means any diminution of the skin is diminishing the
structure, no?



David Pascoe

ummm, yeah. Him.

One might want to take his web site with a grain of salt. He
thinks diesel engines have spark plugs and that pressboard
is the same as laminated composite.


after examining 4000 used boats with some degree of blistering he found
only about 10 where the blisters actually created an issue with
structural integrity.

Measured how?

I've seen blisters that were in the paint and not affecting
the fiberglass at all; I've seen some that were in the
surface and either did not affect the strength, or affected
it very very little... and some that certainly would affect
the structural integrity of the boat, since they were almost
baseball-sized craters.

As for claims of affecting or not affecting the strength,
the only way to tell would be to place a load on the hull
and measure the deflection, then compare that result to a
similar test result done when the boat was new.

Most boats do not get such loads under normal use, which is
why you don't hear much about blistered boats crumpling at
sea. OTOH to buy a severely blistered boat and head around
Cape Horn, just to prove the boat's strength, would probably
not be smart.

Fair Skies
Doug King

"Harry Krause" wrote in message
. ..
On 11/7/2006 12:02 PM, JoeSpareBedroom wrote:
"Eisboch" wrote in message
...
"JoeSpareBedroom" wrote in message
...


Hang on tight! Sudden left turn: Does anyone make aluminum hulls in
the 30-ish foot range? If not, why not? Please provide a 3 page essay,
single spaced.
Yes.


You get an A minus.


Here's an interesting site:

http://www.billmunsonboats.com/

I was thinking of more stylish, traditional hulls, like my magnificent Lund
yacht, but bigger.

"JoeSpareBedroom" wrote in message
...
"Harry Krause" wrote in message
. ..
On 11/7/2006 12:02 PM, JoeSpareBedroom wrote:
"Eisboch" wrote in message
...
"JoeSpareBedroom" wrote in message
...


Hang on tight! Sudden left turn: Does anyone make aluminum hulls in
the 30-ish foot range? If not, why not? Please provide a 3 page essay,
single spaced.
Yes.


You get an A minus.


Here's an interesting site:

http://www.billmunsonboats.com/

I was thinking of more stylish, traditional hulls, like my magnificent
Lund yacht, but bigger.



http://www.winninghoff.com/pho9mbass.htm

"DSK" wrote in message
...

Harry Krause wrote:
BTW, no matter what anyone tells you or what you read, if you see
evidence of osmotic blistering on a boat you are thinking of buying,
move on.

Depends on the boat, depends on the blisters.


Chuck Gould wrote:
Please do tell how the typical gelcoat blisters found on most used
boats have a "far greater impact" than cosmetic.


I dunno about "far greater" impact, but one certainly sould not take it
for granted. After all, a fiberglass boat has a great deal of structural
integrity depending on the skin. That means any diminution of the skin is
diminishing the structure, no?



David Pascoe

ummm, yeah. Him.

One might want to take his web site with a grain of salt. He thinks diesel
engines have spark plugs and that pressboard is the same as laminated
composite.


after examining 4000 used boats with some degree of blistering he found
only about 10 where the blisters actually created an issue with
structural integrity.

Measured how?

I've seen blisters that were in the paint and not affecting the fiberglass
at all; I've seen some that were in the surface and either did not affect
the strength, or affected it very very little... and some that certainly
would affect the structural integrity of the boat, since they were almost
baseball-sized craters.

As for claims of affecting or not affecting the strength, the only way to
tell would be to place a load on the hull and measure the deflection, then
compare that result to a similar test result done when the boat was new.

Most boats do not get such loads under normal use, which is why you don't
hear much about blistered boats crumpling at sea. OTOH to buy a severely
blistered boat and head around Cape Horn, just to prove the boat's
strength, would probably not be smart.

Fair Skies
Doug King


I think the biggest effect blisters have is on the boat's resale value.

Eisboch

"JoeSpareBedroom" wrote in message
...
"Harry Krause" wrote in message
. ..
On 11/7/2006 12:02 PM, JoeSpareBedroom wrote:
"Eisboch" wrote in message
...
"JoeSpareBedroom" wrote in message
...


Hang on tight! Sudden left turn: Does anyone make aluminum hulls in
the 30-ish foot range? If not, why not? Please provide a 3 page essay,
single spaced.
Yes.


You get an A minus.


Here's an interesting site:

http://www.billmunsonboats.com/

I was thinking of more stylish, traditional hulls, like my magnificent
Lund yacht, but bigger.

http://www.fairmetalboats.com/

Eisboch

Harry Krause wrote:
On 11/7/2006 9:51 AM, Chuck Gould wrote:
Harry Krause wrote:

BTW, no matter what anyone tells you or what you read, if you see
evidence of osmotic blistering on a boat you are thinking of buying,
move on. Those in the broker business will try to convince you it is
"only cosmetic," but it can have a far greater impact than that. I was
looking at a boat that had had some blistering repaired and noticed that
more pustules were breaking out elsewhere.


Please do tell how the typical gelcoat blisters found on most used
boats have a "far greater impact" than cosmetic.

David Pascoe, a surveyor who hates dealers and brokers as much as
anybody possibly could, has written that the idea the blisters damage
the structural integrity of a boat is a "misperception" and states that
after examining 4000 used boats with some degree of blistering he found
only about 10 where the blisters actually created an issue with
structural integrity. By my math, that's 0.25%- hardly the sort of
probability that should foster a rule of thumb "run away quickly if you
spot a blister". If a prospective buyer hires a decent surveyor and the
blisters are classified as "cosmetic", there would be no reason to pass
on a boat that was otherwise attractive. In fact, it's pretty common to
demand a further discount once blisters are discovered (most of the
time they are under the waterline and won't be seen until the survey
haulout), and then once the deal closes boat for many many years
without doing a darn thing about the unsightly but harmless pimples on
the bottom.

Pascoe's entire text on the subject:

http://www.yachtsurvey.com/BuyingBlisterBoat.htm


Please elaborate on your rule of thumb.



Not worth the effort, but here is someone else's opinion. Note the
reference to delamination. SeaView site.



Glad you liked that Seaview article, it happens to be one of mine. I
did that interview with Phil for the magazine several years ago, and
they use it for their website.

When I had my boat in for its redo last spring, I had planned to have
the bottom completely stripped, a barrier coat applied, and new bottom
paint. Seaview stopped stripping off the old bottom paint when they
found some blisters. At no charge to me (at least for that) they did
some "test peels" where the skin out mat was removed and the laminate
below was examined. In each and every area tested there was *no*
evidence of delam below the mat, and that is the case in the
overwhelming majority of boats with gelcoat blisters. Seaview didn't
want to proceed with a barrier coat because of the possibilty that
blisters might continue to form and that could be confused with a
warranty issue in the future, but even Seaview agreed that there would
be no need to address the blisters unless I was concerned about
cosmetics.

Blistering can be evidence of delam, but there is no basis to conclude
that whenever one sees a blister there is likely delamination as well.
Nor is there any evidence that blistering will "lead to" delamination.

Thereby leading to my opinion and an opinion shared by a probable
majority of people who have looked into the blistering issue; in most
cases a blister is entirely cosmetic and a decent surveyor will be able
to tell a prospective buyer whether a specific case of blisters might
be that rare situation where the blisters are a visible indicator of a
deeper and structural problem.

"Chuck Gould" wrote in message
ups.com...


Glad you liked that Seaview article, it happens to be one of mine.

..

You could peel all the gelcoat off a fiberglass boat and throw it away,
without sacrificing any structural integrity. Gelcoat is a porous,
cosmetic, alternative to paint.

When you find "baseball sized craters" on a boat, you're dealing with
an extreme situation that goes well beyond cosmetic gelcoat blisters. I
would agree that a boat with baseball sized craters should be avoided,
but that's not what one finds in most cases. I diagree that gelcoat
blisters are a "kiss of death" that should take any boat with typical
cosmetic blistering out of consideration.