Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-02-2013, 16:34   #1
Registered User

Join Date: Sep 2010
Posts: 127
Opinions about Cored Hulls ...

Was lookin at a 40 foot sailboat. One of my reservations about the boat was that it was balsa cored above the waterline. am i over reacting?? the boat is a steal.... I mean arent there plenty of boats out there 35 to 42 foot that dont have cored hulls? that wood just seems like one more thing to worry about.. i cudnt imagine recoring the sides... So i guess im looking for something full keel solid glass. All advice greatly appreciated!!
__________________

__________________
albergsailor is offline   Reply With Quote
Old 10-02-2013, 16:44   #2
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,362
Re: opinions about cored hulls...

I've got no problem with above the waterline. Look for penetrations and ensure they dont go through raw core though.
Yes, more uncored than cored out there I would guess....
__________________

__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is online now   Reply With Quote
Old 10-02-2013, 16:48   #3
Don't ask if you can't handle it
 
sailorboy1's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: On the boat somewhere
Boat: Hunter 410
Posts: 12,311
Re: opinions about cored hulls...

Quote:
Originally Posted by albergsailor View Post
am i over reacting??
yes, 1000s and 1000s of cored boats out there, if the 1 you are looking at doesn't have any hull coring problems there isn't an issue

PS - a lot more problems are found in solid hull boats with cored decks with deck rot than in cored huls for the most part
__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 is offline   Reply With Quote
Old 10-02-2013, 17:50   #4
Registered User
 
jeremiason's Avatar

Join Date: Oct 2010
Location: Punta Gorda, Florida
Boat: Sea Ray 270
Posts: 1,427
Images: 2
Send a message via ICQ to jeremiason Send a message via Yahoo to jeremiason Send a message via Skype™ to jeremiason
Re: opinions about cored hulls...

There are not many boats made in the last 15 or 20 years that have solid core hulls.

Most manufactures are using solid core from the water line down and cored from the water line up. The purpose is for weight and cost.

Whatever boat you look to purchase... have a recommeded surveyor do a report on the boat
__________________
Tom Jeremiason
Punta Gorda, Florida

jeremiason is offline   Reply With Quote
Old 10-02-2013, 18:10   #5
Moderator
 
Hudson Force's Avatar

Cruisers Forum Supporter

Join Date: Nov 2008
Location: Lived aboard & cruised for 45 years,- now on a chair in my walk-in closet.
Boat: Morgan OI 413 1973 - Aythya
Posts: 7,894
Images: 1
Re: opinions about cored hulls...

I'd check the history of the manufacturer. I had a 1969 30' Whitney with a cored deck and hull that I sold in '73 when it had spongy decks. I saw the boat on the ways a few years later and the freeboard was a maze of warps and wrinkles! Having a cored deck and hull in itself is not a problem. The risk is with the type of coring material. Some early compressable foams are a total loss and some later composites are risk free.
__________________
Take care and joy, Aythya crew
Hudson Force is offline   Reply With Quote
Old 11-02-2013, 04:53   #6
Registered User

Join Date: Mar 2011
Location: Dublin, Ireland
Boat: Amel Santorin 46ft
Posts: 113
Are there really thousands of cores hull boats still out there. Looking around my home marina I know of only one and it is from a small specialised boat builder. Did any of the major boat builders follow or continue the route of building cored hulls. Having experienced walking on a spongy deck, I would not be to gone on the idea of sailing in a boat, with the possibility of it having a spongy hull. Regards Joe
__________________
joemac4sail is offline   Reply With Quote
Old 11-02-2013, 05:59   #7
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Re: Opinions about Cored Hulls ...

I would not buy a 50yo cored boat because in those days they had no clue how to build them

Most modern catamarans are fully cored, as are we and no trouble at all. There has been a motorboat manufacturer who messed it up real good and that, fueled by the crusade against them by a surveyor, is the source of most anti-core stories.
__________________
s/v Jedi is offline   Reply With Quote
Old 11-02-2013, 06:30   #8
Don't ask if you can't handle it
 
sailorboy1's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: On the boat somewhere
Boat: Hunter 410
Posts: 12,311
Re: Opinions about Cored Hulls ...

Quote:
Originally Posted by joemac4sail View Post
Are there really thousands of cores hull boats still out there. Looking around my home marina I know of only one and it is from a small specialised boat builder.
Just how does one tell by "looking around" whether a hull is cored?
__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 is offline   Reply With Quote
Old 11-02-2013, 07:19   #9
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Quote:
Originally Posted by Don Lucas View Post

Just how does one tell by "looking around" whether a hull is cored?
It must be the one with the wrinkled hull
__________________
s/v Jedi is offline   Reply With Quote
Old 11-02-2013, 07:32   #10
Registered User
 
jeremiason's Avatar

Join Date: Oct 2010
Location: Punta Gorda, Florida
Boat: Sea Ray 270
Posts: 1,427
Images: 2
Send a message via ICQ to jeremiason Send a message via Yahoo to jeremiason Send a message via Skype™ to jeremiason
Re: Opinions about Cored Hulls ...

Here is an article on Cored Hulls that might help

Cored Hull Bottoms
__________________
Tom Jeremiason
Punta Gorda, Florida

jeremiason is offline   Reply With Quote
Old 11-02-2013, 07:39   #11
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Quote:
Originally Posted by jeremiason View Post
Here is an article on Cored Hulls that might help

Cored Hull Bottoms
Yep, that's the crusader I hinted at
__________________
s/v Jedi is offline   Reply With Quote
Old 11-02-2013, 07:44   #12
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Opinions about Cored Hulls ...

Quote:
Originally Posted by s/v Jedi View Post
I would not buy a 50yo cored boat because in those days they had no clue how to build them

Most modern catamarans are fully cored, as are we and no trouble at all. There has been a motorboat manufacturer who messed it up real good and that, fueled by the crusade against them by a surveyor, is the source of most anti-core stories.


LOL! On this website alone there are countless stories of people dealing with rotten saturated core. I'd say at least 50% of the people here who have owned cored boats have experienced some sort of core problem. That's not a good track record. Sea Ray was a drop in the bucket, core problems are legion. Talk to any pro boatyard worker. Coring hulls below the waterline is just not smart. I'd say that's the source of most "anti-core stories", owners who have had to pay tens of thousands to fix the problem. And there are lots of them.
__________________
minaret is offline   Reply With Quote
Old 11-02-2013, 07:51   #13
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Cowes (Winter), Baltic (Summer) (the boat!); somewhere in the air (me!)
Boat: Cutter-Rigged Moody 54
Posts: 19,748
Re: Opinions about Cored Hulls ...

Cored hulls are much stronger and lighter than solid, and much more expensive to make properly.

Virtually all modern catamarans have cored hulls, because they are so sensitive to weight.

Inexpensive production boats like Bene, Jennie, Bav, Hunter, etc., are always solid fiberglass.

High end monos like Swan, Hallberg Rassey, etc. are almost always fully cored, with Oyster being the notable exception.


Cored hulls definitely create some risk of problems. The risk is less with quality builders. Certain techniques are better than others. Resin-encapsulated end-grain balsa blocks are apparently the best way to do it, although many cats use different kind of synthetic materials. Another disadvantage of cored hulls is that it is difficult and expensive to put in new through-hulls properly.

A significant advantage of cored hulls is that they are warmer, less prone to condensation, and also provide significant sound insulation.


I would avoid cored hulls on very old boats, or boats made by lesser quality yards. Nick is right -- it took a few decades of building cored hulls before the industry figured it out.
__________________
Dockhead is online now   Reply With Quote
Old 11-02-2013, 07:55   #14
Registered User
 
capttman's Avatar

Join Date: Apr 2011
Location: Satellite Beach Florida
Boat: Bruce Roberts 434
Posts: 716
Send a message via Skype™ to capttman
If the boat is balsa cored the core is probably impregniated with resin so it should be fine, just saying. My hull is aired cored hull and balsa deck and no problems for 15 years
__________________
Capttman

"When the bow be in the trees we'll be running out of seas"
capttman is offline   Reply With Quote
Old 11-02-2013, 07:58   #15
Don't ask if you can't handle it
 
sailorboy1's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: On the boat somewhere
Boat: Hunter 410
Posts: 12,311
Re: Opinions about Cored Hulls ...

Quote:
Originally Posted by Dockhead View Post
Inexpensive production boats like Bene, Jennie, Bav, Hunter, etc., are always solid fiberglass.

Well that's not true. My Hunter's hull is cored above the waterline and solid below. Far as I know they have been dong it that way for some time!

Should always be real careful about using the word "always"
__________________

__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 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
Fiberglass vs Steel Hulls larryb Monohull Sailboats 24 21-08-2016 00:31
Replacing Through Hulls 10yearplan Construction, Maintenance & Refit 22 05-02-2013 21:08
Most Reliable Hull Construction ? lorenzoSF Construction, Maintenance & Refit 26 21-10-2012 20:11
Capsize Ratio's topfish Monohull Sailboats 266 06-07-2012 19:44
Cored Hulls holmek Construction, Maintenance & Refit 8 03-08-2011 08:26



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 10:16.


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.