Hull Blisters - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 08-02-2009
CKH CKH is offline
Junior Member
 
Join Date: Jul 2009
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
CKH is on a distinguished road
Hull Blisters

Blistering seems to be a big issue, and a serious problem, with many sailboats.
And because I have no knowledge, training or experience in the subject matter, any explanations, simple or scientific, will be wasted on me.
This brief survey, however, will help me greatly.
Thank you in advance for your help. This could be a teachable moment for me.
Would all boat owners who have had their boat sink due to blistering as the original causal factor simply list here the:

Length - Year Keel Laid - Manufacturer - Date Of Loss
Reply With Quote Share with Facebook
  #2  
Old 08-02-2009
LarryandSusanMacDonald's Avatar
SaltwaterSuzi/CapnLarry
 
Join Date: Apr 2005
Location: Permanent Vacation
Posts: 600
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
LarryandSusanMacDonald will become famous soon enough
I'm going to answer this one with the risk of getting my head chewed off because there are differing opinions. I work in a marina. I thought I had a blister problem on my boat. (Turned out it was just some blisters in the bottom paint - no big deal.) But I was concerned.

I asked some of the pro's who have worked here for 20 or 30 years. No one had ever heard of a boat sinking because of blisters.

If it's a problem that you want to address, pull the boat, pressure wash as usual, have it blocked on tripods. Pop the blisters and let them dry out for a couple of days, inject some epoxy in to them and let them dry. Sand any rough spots. Apply bottom paint. Launch. Go sailing. If anyone mentions blisters again, drink rum until they can't be heard anymore.

Or spend lots and lots of money and have the bottom ground out and redone. Screw that, I say.
__________________
Saltwater Suzi and Cap'n Larry


"A sailboat is a fickle mistress. You’ve got to buy her things. You’ve got to understand everything about her. What you don’t know she’ll use against you." -Captain Larry


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



Reply With Quote Share with Facebook
  #3  
Old 08-02-2009
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,878
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
Consider your head chewed off.

FROM ZAHNISERS CRAIG BUMGARNER

"In real life, we are starting to see failures in hull bottoms we think are directly related to hydrolysis damage to laminate resin. In six separate cases, we have seen serious, though the hull fractures at the keel roots on fin keeled sail boats. In each case, the laminate resin was severely hydrolyzed. We have seen two cases of laminate fracture across bulkhead hard spots in two powerboats which we thought were related to hydrolysis of the laminate resin. The good news is that eight boats is not a lot of boats, but consider that these are only the ones that we have seen. Surely there are more out there and surely there have been boats lost for these reasons as well. Accident investigation on sunk boats is not like aircraft crash investigation. Unless the boat is in the way, it is usually not raised and the cause of sinking investigated."
Source: Blister & Laminate Hydrolysis in Fiberglass Boat Hulls
2003.

********
And that is evidence from ONE yard on the Chesapeake...a very good yard.
__________________
No longer posting. Reach me by PM!
Reply With Quote Share with Facebook
  #4  
Old 08-02-2009
CKH CKH is offline
Junior Member
 
Join Date: Jul 2009
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
CKH is on a distinguished road
Thank you for the replies

Thanks for the replies.
I actually wanted to see responses from real owners who had lost their vessel(s) due to this specific cause. The world seems to be full of "reports" and sightings but I have always viewed them with suspicion, while owners would, I believe, tend to be objective and certainly less prone to bias.
Reply With Quote Share with Facebook
  #5  
Old 08-02-2009
night0wl's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,401
Thanks: 0
Thanked 17 Times in 17 Posts
Rep Power: 9
night0wl is on a distinguished road
I dont think anyone will post that they actually had a hull loss due to blisters. Mostly because it would force a boat owner to admit that they made a bad choice in selection of their vessel...
__________________
S/V Jendai
Beneteau 343
Reply With Quote Share with Facebook
  #6  
Old 08-02-2009
CKH CKH is offline
Junior Member
 
Join Date: Jul 2009
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
CKH is on a distinguished road
Or, no boats have been sunk or lost due to blister condition.
Reply With Quote Share with Facebook
  #7  
Old 08-02-2009
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,878
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
You might try calling or writing to Craig at Zahnheisers to ask for more detailed and or up to date info CKH.
I don't think owners are gonna come forward voluntarily. I also think some sinkings where hull failures are involved could easily be blister related since it reduces hull strength particularly at stress/flexion point.
I think about the abandoned Vagabond42 recently at sea and wonder if the bulkhead separation due to hull flex may have been caused by an underlying delam weakness due to hyrolysis that allowed the hull to flex too much. Knowing how heavily the bots were initially built, this seems to be a cause worth considering.
Maybe some of the boats lost at sea to keel loss, rudder loss etc. may actuallybe arributed to blister damage but we'll never know.
__________________
No longer posting. Reach me by PM!
Reply With Quote Share with Facebook
  #8  
Old 08-02-2009
CKH CKH is offline
Junior Member
 
Join Date: Jul 2009
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
CKH is on a distinguished road
Vagabond not sunk

"1969, July 12: yacht Vagabond found derelict on edge of Sargasso Sea."
They may have abandoned ship due to distaste for blisters, but she apparently didn't sink because of them.
My concern is that all these reports seem to be third party, and there are far too many vested interests in selling fixes, cures and treatments.
Hence the question for owners stands.
Reply With Quote Share with Facebook
  #9  
Old 08-03-2009
oscilating or persistant?
 
Join Date: Jul 2009
Location: on a yacht!
Posts: 27
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
slippery is on a distinguished road
hull blisters cause sinking.

After more than thirty years in the marine coatings industry and most of that dealing with Bottom issues it is fair to say that i have never seen a GRP boat (Eeven a poorly built one) sink from osmosis.

even the earliest examples of 60's American patrol boats built of polyester GRP laminates that had been immersed for years with no epoxy "barrier coat" or any "anti osmosis" barrier had never suffered osmosis blisters to and extend as to compromise hull integrity and enabel them to sink via water ingress.

Are you sure you are not confusing osmosis blistering with lamination or poor layup issues or maybe stress related cracking.

How old is the boat and what make is it?
Reply With Quote Share with Facebook
  #10  
Old 08-03-2009
oscilating or persistant?
 
Join Date: Jul 2009
Location: on a yacht!
Posts: 27
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
slippery is on a distinguished road
After more than thirty years in the marine coatings industry and most of that dealing with Bottom issues it is fair to say that i have never seen a GRP boat (Eeven a poorly built one) sink from osmosis.

even the earliest examples of 60's American patrol boats built of polyester GRP laminates that had been immersed for years with no epoxy "barrier coat" or any "anti osmosis" barrier had never suffered osmosis blisters to and extend as to compromise hull integrity and enabel them to sink via water ingress.

Are you sure you are not confusing osmosis blistering with lamination or poor layup issues or maybe stress related cracking.

How old is the boat and what make is it?
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ryobi vs. Makita vs. Poliglow?? CLucas Gear & Maintenance 61 05-05-2012 06:02 AM
Theory on cause of Fiberglass Hull Blisters travistowle Gear & Maintenance 119 10-31-2011 08:59 AM
Blisters Michael201 Gear & Maintenance 5 02-07-2009 05:36 PM
Spring Hull Cleaning Tom Wood Gear and Maintenance Articles 0 04-05-2004 08:00 PM
Hull Blisters Don Casey Gear and Maintenance Articles 0 09-11-2000 08:00 PM


All times are GMT -4. The time now is 03:32 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.