Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 19-12-2011, 08:21   #1
Registered User

Join Date: Apr 2011
Posts: 25
How do fix this?

How do fix this? This is on a side of a hull. Is the barrier coat and gel coat is the same thing? If not what barrier coat used for?
Attached Thumbnails
Click image for larger version

Name:	New London-20111212-00168.jpg
Views:	108
Size:	399.7 KB
ID:	34901   Click image for larger version

Name:	New London-20111212-00169.jpg
Views:	106
Size:	398.9 KB
ID:	34902  

Click image for larger version

Name:	New London-20111212-00170.jpg
Views:	106
Size:	401.1 KB
ID:	34903  
__________________

__________________
transiberian is offline   Reply With Quote
Old 19-12-2011, 09:02   #2
Registered User

Join Date: Oct 2007
Location: Isla Saboga, Las Perlas, Panama
Boat: 1994 Hunter 37.5
Posts: 163
Re: How do fix this?

Quote:
Originally Posted by transiberian View Post
How do fix this? This is on a side of a hull. Is the barrier coat and gel coat is the same thing? If not what barrier coat used for?
That appears to be cracking due to flexing of the hull against a hard interior bulkhead or something similar. Putting some additional stringers on the inside of the hull to keep it from flexing so much would help.

You can also try redoing the area where the bulkhead or cabinet, or whatever is creating the hard spot on the inside, meets the hull to try and spread out the load so it doesn't bear on that one sharp point. There are several ways to do that, but it means removing and reinstalling the bulkhead, and that might make it too much of a hassle depending on where it is.

What you have in the pictures is gelcoat. Barrier coat is applied below the waterline to keep water out of the fiberglass layers. Gellcoat is porous, so moisture will penetrate and encourage blisters to form. The barrier coat is non-porous, so it helps keep it out.

Hope this helps.
__________________

__________________
oldjags is offline   Reply With Quote
Old 19-12-2011, 09:03   #3
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,373
Re: How do fix this?

Hello,

First, in the marine industry barrier coat is a generic term usually used to refer to any resin or coating applied to the underwater parts of the hull to prevent absorption of water by the fiberglass and potentially causing blisters.

Gelcoat is a special type of resin that is the first layer applied in the mold when you are building a fiberglass boat. The gelcoat is a barrier to water and also includes the color and is pretty UV stable.

To repair the section in your photo depends. Is this just a superficial, surface crack? It looks in the picture like there could have been some impact there which could mean the glass under the gelcoat is also cracked.

Depending on how serious and how deep you would use different repair procedures.
__________________
The water is always bluer on the other side of the ocean.
skipmac is offline   Reply With Quote
Old 19-12-2011, 10:21   #4
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: How do fix this?

Definitely an impact fracture, if it was a hard edge as previously mentioned it would be more of a line of cracks and not the spiderweb you see here. I would suggest taking it to a pro, the fact that you don't know the difference between gel and barrier coat leads me to believe this repair is beyond your skill set for now. Only try to do it yourself if that is a skill set you wish to acquire, the learning curve is large.
__________________
minaret is offline   Reply With Quote
Old 19-12-2011, 10:35   #5
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,342
Re: How do fix this?

Looks like impact to me too.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 20-12-2011, 10:41   #6
Registered User

Join Date: Apr 2011
Posts: 25
Re: How do fix this?

Thanks everyone! I still want to do it myself. I am very resourcefull, I think I just buy a book that explains how to fix this. I looked inside a boat and that crack is located just where a bulkhead is but its a horizontal one (I am not sure if still called bulkhead)
__________________
transiberian is offline   Reply With Quote
Old 20-12-2011, 11:25   #7
Registered User
 
swagman's Avatar

Join Date: Sep 2005
Location: Winter land based UK New Forest. Summer months away. Making the transition from sail to power this year - scary stuff.
Boat: Super Van Craft 1320 Power Yacht
Posts: 2,175
Images: 10
Send a message via Skype™ to swagman
Re: How do fix this?

Quote:
Originally Posted by transiberian View Post
Thanks everyone! I still want to do it myself. I am very resourcefull, I think I just buy a book that explains how to fix this. I looked inside a boat and that crack is located just where a bulkhead is but its a horizontal one (I am not sure if still called bulkhead)
Which maybe makes the early suggestion that it could be a 'hard spot' thats caused the cracks, and perhaps making it worthwhile to not just treat it as am impact fracture, but to also strengthen inside.

Despite what others say working with fibreglass is not brain surgery. I'm sure you can master whats required.

Grinding back the inner surfaces and rebonding the horizontal support to the hull, and spreading the load over a wider area, is not hard.
Nor is using a small dremel type device to cut into the cracks from outside, and infilling with matching gel coat.

Enjoy
JOHN
__________________

__________________
Don't take life too seriously. No ones going to make it out alive......Go see our blog at http://www.sailblogs.com/member/yachtswagman/
swagman 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
Autopilot Fix - Need Ideas DRS Marine Electronics 9 27-10-2011 22:44
Engine Exhaust Outlet - What Does this Mean and How Do I Fix it ? Palarran Engines and Propulsion Systems 5 10-10-2011 15:02
Volvo 2002 injector sleeve fix Gerry Connolly Engines and Propulsion Systems 3 05-09-2011 21:20
Urgent Help Wanted - Emergency Self-Steering for a 42' Cat YachtRisky Multihull Sailboats 32 31-08-2011 21:12
Can I Fix Your Boat ? sabray Our Community 8 27-08-2011 19:21



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:58.


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.