CAUSES OF BOAT HULL BLISTERS
 

http://www.daviscoltd.com/nams/Docum...er_Report.html

By Thomas J. Rockett, Ph.D. and Vincent Rose, Ph.D.

Department of Chemical Engineering; University of Rhode Island;
Kingston, Rhode Island

This report is the product of work accomplished under U. S. Coast
Guard Grant #1501.83

Mic,

Thanks for all the information you are contributing to this group.
I've found it informative and helpful.

Don W.

Mic wrote:
http://www.daviscoltd.com/nams/Docum...er_Report.html

By Thomas J. Rockett, Ph.D. and Vincent Rose, Ph.D.

Department of Chemical Engineering; University of Rhode Island;
Kingston, Rhode Island

This report is the product of work accomplished under U. S. Coast
Guard Grant #1501.83

On Fri, 26 Aug 2005 15:14:11 GMT, Don W
wrote:

Mic,

Thanks for all the information you are contributing to this group.
I've found it informative and helpful.

Don W.

I appreciate your comments.

There are so many that contribute to those of us interested in
sailing. From their cruising logs and well thought out practical
experience to restorations. The time and effort those people put into
their contribution is so great it does make a difference.


Mic wrote:
http://www.daviscoltd.com/nams/Docum...er_Report.html

By Thomas J. Rockett, Ph.D. and Vincent Rose, Ph.D.

Department of Chemical Engineering; University of Rhode Island;
Kingston, Rhode Island

This report is the product of work accomplished under U. S. Coast
Guard Grant #1501.83

Yes I want to say thanks for this as well.
Very interesting stuff

Tony uk


"Mic" wrote in message
...
On Fri, 26 Aug 2005 15:14:11 GMT, Don W
wrote:

Mic,

Thanks for all the information you are contributing to this group.
I've found it informative and helpful.

Don W.

I appreciate your comments.

There are so many that contribute to those of us interested in
sailing. From their cruising logs and well thought out practical
experience to restorations. The time and effort those people put into
their contribution is so great it does make a difference.


Mic wrote:
http://www.daviscoltd.com/nams/Docum...er_Report.html

By Thomas J. Rockett, Ph.D. and Vincent Rose, Ph.D.

Department of Chemical Engineering; University of Rhode Island;
Kingston, Rhode Island

This report is the product of work accomplished under U. S. Coast
Guard Grant #1501.83

On Fri, 26 Aug 2005 22:49:15 +0000 (UTC), "Tony"
wrote:

Yes I want to say thanks for this as well.
Very interesting stuff

Thanks for the inspiration, I have found much of this info.
interesting and useful. Enjoy....

Such appreciation has inspired me to provide further sailing info,
thanks.



Tony uk


"Mic" wrote in message
...
On Fri, 26 Aug 2005 15:14:11 GMT, Don W
wrote:

Mic,

Thanks for all the information you are contributing to this group.
I've found it informative and helpful.

Don W.

I appreciate your comments.

There are so many that contribute to those of us interested in
sailing. From their cruising logs and well thought out practical
experience to restorations. The time and effort those people put into
their contribution is so great it does make a difference.


Mic wrote:
http://www.daviscoltd.com/nams/Docum...er_Report.html

By Thomas J. Rockett, Ph.D. and Vincent Rose, Ph.D.

Department of Chemical Engineering; University of Rhode Island;
Kingston, Rhode Island

This report is the product of work accomplished under U. S. Coast
Guard Grant #1501.83

Interesting material. However, I intend to re-start the debate over
the effects of blisters. Can anybody find any examples of hull failure
due to normal blisters? I maintain that such blisters are at worst a
cosmetic problem that are ussually hidden under water. I have seen a
web site that says 80% of all blister repairs, even by gelcoat peeling
are failures.

Its fairly rare, but I have seen 1 case where the blistering was so bad as
to weaken the hull considerably and this boat was kept in freshwater

Tony uk

wrote in message
ups.com...
Interesting material. However, I intend to re-start the debate over
the effects of blisters. Can anybody find any examples of hull failure
due to normal blisters? I maintain that such blisters are at worst a
cosmetic problem that are ussually hidden under water. I have seen a
web site that says 80% of all blister repairs, even by gelcoat peeling
are failures.

Harry,
Are you saying that only a crook would tell you blisters are not important?


"Harry Krause" wrote in message
...
DSK wrote:
wrote:
Interesting material. However, I intend to re-start the debate over
the effects of blisters. Can anybody find any examples of hull failure
due to normal blisters?

You mean, like a boat coming apart or sinking? No.

But I do know of several cases of blisters the size of softballs, eaten
right thru the laminate. IMHO that's a significant problem even if it's
not structural. And IMHO (again) it *is* structural.

.... I maintain that such blisters are at worst a
cosmetic problem that are ussually hidden under water.

In many cases, yes.

... I have seen a
web site that says 80% of all blister repairs, even by gelcoat peeling
are failures.


That depends on who you listn to (Pascoe?) and how the repair is done.
There are several facilities that do blister repairs warranted for ten
years. They generally seal the hull and dry it out thoroughly before
barrier coating. Most blister repairs that fail address only the cosmetic
issue, not the underlying cause... wonder why they fail???

Fresh Breezes- Doug King


Many of those who claim that blisters are not serious are either selling
their blister-infested boats, or are engaged in the sale of boats with
blisters. Boat brokers are notorious for telling prospective buyers that
"those blisters are not serious."

Yeah, right.

I think that if you buy a boat, you directly ask the surveyor his
opinion on whether or not the blisters are a structural issue.

I have owned two boats with blisters. The first I repaired by drying
for 3 months and then grinding them out and filling with epoxy and then
several epoxy barrier coats (I know, not the same as a gelcoat peel)
and when it looked beautiful, it went back in the water and all my work
was hidden. A total waste of time as none of the blisters was into the
lam. The inside of the boat showed no problems at all.
My current boat has some blisters and my strategy is to repair any that
look bad and ignore the others. I had a surveyor look over the boat
(not a real survey) for insurance purposes recently and he stated "No
obvious blisters" even though I had seen them . I think that if a boat
is over 20 yrs old and the blisters have not becom a structural prob,
they arent likely to ever be.