Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-08-2011, 09:27   #1
Registered User

Join Date: Sep 2010
Posts: 844
Images: 1
Is Age a Factor in the Seaworthiness of a Glass Hull ?

... Does the age alone of a glass hull necessarily increase the risk of delamination, osmosis or other problems?

To my way of thinking, a well maintained 30 year old glass boat is not necessarily a liability.

It would seem that the maintenance of the boat (or lack thereof) plus any possible collision damage to the hull would be much more of a factor than the age of a well-constructed glass hull.

Comments anyone?

G2L
__________________

__________________
Gone2long is offline   Reply With Quote
Old 05-08-2011, 10:12   #2
Registered User
 
Aussie_Sequoia's Avatar

Join Date: Apr 2011
Location: New South Wales, Australia
Boat: Prout Event 34
Posts: 250
Send a message via Skype™ to Aussie_Sequoia
Re: Is Age a Factor in the Seaworthiness of a Glass Hull?

I would agree. I think that a well maintained, late seventies, hand laid, solid hull may very possibly be stronger than some of the new production boat hulls available today.

I was talking the other day to an old boat builder who was making boats from that era and he reckons that there in no reason why some of those older hulls wouldn't last a hundred years.
__________________

__________________
Aussie_Sequoia is offline   Reply With Quote
Old 05-08-2011, 10:14   #3
Registered User
 
Butler's Avatar

Join Date: Feb 2010
Location: Los Angeles
Boat: Pearson 281
Posts: 678
Images: 18
Re: Is Age a Factor in the Seaworthiness of a Glass Hull?

"...well-constructed glass hull."
There we go, thats the key.
I had a freebie 32' LeComte Medalist built in the 60s with a very thin hull lay-up stiffened with stringers. This was bad enough for the oil canning on the stands but there were also largish patches of resin starved hull and one area near the turn down to the keel that was constantly damp. This is what convinced me to let go of the boat as pretty as she was. Would have made a nice classic plastic showboat for weekending/daysailing but not a cruiser!
Original lay-up is everything.
__________________
Butler is offline   Reply With Quote
Old 05-08-2011, 10:17   #4
Senior Cruiser
 
osirissail's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: A real life Zombie from FL
Boat: Gulfstar 53 - Osiris
Posts: 5,416
Images: 2
Re: Is Age a Factor in the Seaworthiness of a Glass Hull?

Quote:
Originally Posted by Aussie_Sequoia View Post
I would agree. I think that a well maintained, late seventies, hand laid, solid hull may very possibly be stronger than some of the new production boat hulls available today. . .
I would agree with that observation up to a point. Around the mid to late 90's the mainline boat manufacturers changed their whole process of "laying up" a hull. Using SCRIMP or similar procedures resulted in a superior hull with much less weight. Also some mainline manufacturers started using several layers of vinyl-ester resin as the exterior layers to a large part eliminating the osmosis problems of the "middle years" boats.
__________________
osirissail is offline   Reply With Quote
Old 05-08-2011, 10:22   #5
Registered User

Join Date: Feb 2009
Posts: 1,848
Re: Is Age a Factor in the Seaworthiness of a Glass Hull?

Quote:
Originally Posted by osirissail View Post
I would agree with that observation up to a point. Around the mid to late 90's the mainline boat manufacturers changed their whole process of "laying up" a hull. Using SCRIMP or similar procedures resulted in a superior hull with much less weight. Also some mainline manufacturers started using several layers of vinyl-ester resin as the exterior layers to a large part eliminating the osmosis problems of the "middle years" boats.
I agree but if a 70s boat was a good hull when new its probably still good today
__________________
motion30 is offline   Reply With Quote
Old 05-08-2011, 10:29   #6
Registered User

Join Date: Jun 2010
Boat: Far East Mariner 40
Posts: 303
Re: Is Age a Factor in the Seaworthiness of a Glass Hull?

Quote:
Originally Posted by motion30 View Post
I agree but if a 70s boat was a good hull when new its probably still good today
I sure hope so. Wish it were the same for wooden masts.
__________________
I do all my own stunts.
vintageray is offline   Reply With Quote
Old 05-08-2011, 10:29   #7
Registered User
 
sabray's Avatar

Join Date: Aug 2008
Location: Wash DC
Boat: PETERSON 44
Posts: 3,169
Re: Is Age a Factor in the Seaworthiness of a Glass Hull?

There is also more then just the glass hull. The hull to deck joint may need work after years of working or the Bulkhead tabbing, tanks etc... some of this may be maintenance I think it falls into more of a refit category. I own a 79 structurally I havent had to do much. Maintenance I have done a lot.
__________________
sabray is offline   Reply With Quote
Old 05-08-2011, 10:42   #8
Registered User
 
psneeld's Avatar

Join Date: Oct 2010
Location: Avalon, NJ
Boat: Albin 40 double cabin Trawler
Posts: 1,831
Re: Is Age a Factor in the Seaworthiness of a Glass Hull?

Therre are WWII hulls (old navy whale boats and tenders) that are still in service today with NO blisytering or weak issues problems.

So yes...the original layup is an issue...mid 70's boats had a lot of blistering issues due to polyester reformulation due to the "gas" shortage.

A hard tap with a hammer (I prefer a 5 pound slegde) will tell a lot.

In my current job I run a boat (mid 80s) that has NO wood where the stringers should be....the lapping glass is taking up the strength...and the boat is in hard commercial operation.
__________________
psneeld is offline   Reply With Quote
Old 05-08-2011, 12:48   #9
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,576
Images: 240
Re: Is Age a Factor in the Seaworthiness of a Glass Hull ?

See: "Heart of Glass: Fiberglass Boats and the Men Who Made Them" ~ by Daniel Spurr,
International Marine/McGraw-Hill
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is online now   Reply With Quote
Old 05-08-2011, 16:51   #10
Senior Cruiser
 
s/v Beth's Avatar

Cruisers Forum Supporter

Join Date: Oct 2008
Location: Coos Bay, Oregon
Boat: Valiant 40 (1975)
Posts: 4,066
Re: Is Age a Factor in the Seaworthiness of a Glass Hull ?

I run a 1975 boat with no problems with the hull. I doubt there will be problems 35 years from now either, but your not taking a 5 lb sledge to it!.
__________________
s/v Beth is offline   Reply With Quote
Old 05-08-2011, 17:15   #11
Registered User
 
callmecrazy's Avatar

Join Date: Jun 2010
Boat: Tartan 30
Posts: 1,548
Images: 1
My '74 hull is blister free (and no major bottom jobs ever done), hardwood bulkeads still solid, no tabbing issues, hull/deck joint is leak free, and the keel bolts are as good as new after living in murky water their whole life. The boat hasn't even had a working bilge pump in 15 years

Depends on the builder. If it was done well to start with, and treated well enough, age is not a factor.
__________________
My Blog
callmecrazy is offline   Reply With Quote
Old 05-08-2011, 19:04   #12
Senior Cruiser

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Cruising NC, FL, Bahamas, TCI & VIs
Boat: 1964 Pearson Ariel 'Faith' / Pearson 424, sv Emerald Tide
Posts: 1,531
Re: Is Age a Factor in the Seaworthiness of a Glass Hull ?

Quote:
Is Age a Factor in the Seaworthiness of a Glass Hull ?
No....


... not unless you get the dreaded glass worms.
__________________
s/v 'Faith' is offline   Reply With Quote
Old 05-08-2011, 19:17   #13
Registered User
 
sabray's Avatar

Join Date: Aug 2008
Location: Wash DC
Boat: PETERSON 44
Posts: 3,169
Quote:
Originally Posted by callmecrazy
My '74 hull is blister free (and no major bottom jobs ever done), hardwood bulkeads still solid, no tabbing issues, hull/deck joint is leak free, and the keel bolts are as good as new after living in murky water their whole life. The boat hasn't even had a working bilge pump in 15 years

Depends on the builder. If it was done well to start with, and treated well enough, age is not a factor.
And we know the keel bolts are okay because? The keel is stool there or some other method. Not being screwey just curious.
__________________
sabray is offline   Reply With Quote
Old 05-08-2011, 20:37   #14
Registered User
 
callmecrazy's Avatar

Join Date: Jun 2010
Boat: Tartan 30
Posts: 1,548
Images: 1
Quote:
Originally Posted by sabray

And we know the keel bolts are okay because? The keel is stool there or some other method. Not being screwey just curious.
Because there is no sign of corrosion, the keel has never moved, no leaks, no bolts worked loose, no separation from the hull joint... What else is there? The bolts are embeded in lead, then the keel is bonded to the hull, then it's bolted through about 6 (or more) inches of glass (&?) reinforcement. Nothing to worry about there any time soon

Did I mention, This boat is older than I am?
__________________
My Blog
callmecrazy is offline   Reply With Quote
Old 05-08-2011, 20:46   #15
Registered User
 
Khagan1227's Avatar

Join Date: Oct 2010
Location: Kansas City, MO
Boat: In the hunt again, unknown
Posts: 1,330
Re: Is Age a Factor in the Seaworthiness of a Glass Hull ?

Quote:
Originally Posted by callmecrazy View Post
Did I mention, This boat is older than I am?
The USS Constitution and HMS Victory bearly have a few people I could name on here beat.

I'd agree with the 40 year old hulls still sailing, if they made it this long, they are pretty sound.
__________________

Khagan1227 is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to 'Sound Out' a Hull . . . Gone2long Construction, Maintenance & Refit 11 01-08-2011 17:10



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:24.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.