Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 30-10-2017, 12:25   #1
Registered User

Join Date: Aug 2015
Location: Port Townsend, WA
Boat: Tashiba-31
Posts: 269
Images: 1
Bottom paint flaking off

I had my boat hauled and the bottom painted back in Jan-Feb. The boat was put back in the water in May. Today I had a diver replace the zinc on the propeller and he noticed a hand-size patch of bottom paint that flaked off the hull.

She's only been in the water for 5 months and only away from the slip twice and never ran into anything. Is this something that the yard should repair?

If not the yard, what are my options for dealing with this?
__________________

dmksails is offline   Reply With Quote
Old 30-10-2017, 12:32   #2
Registered User
 
UNCIVILIZED's Avatar

Join Date: Jun 2014
Location: Up the mast, looking for clean wind.
Boat: Currently Shopping, & Heavily in LUST!
Posts: 5,629
Re: Bottom paint flaking off

Quote:
Originally Posted by dmksails View Post
I had my boat hauled and the bottom painted back in Jan-Feb. The boat was put back in the water in May. Today I had a diver replace the zinc on the propeller and he noticed a hand-size patch of bottom paint that flaked off the hull.

She's only been in the water for 5 months and only away from the slip twice and never ran into anything. Is this something that the yard should repair?

If not the yard, what are my options for dealing with this?
The yard may have goofed & mixed paints in a manner which is incompatible. Such as applying a hard paint overtop of an ablative. It's worth finding out what's on there in terms of paints, & if the yard goofed, take it up with them. As you're paint shouldn't be coming off by any means, this quickly. They also may not have prepped the bottom sufficently for the new paint to adhere well, meaning not sanding the bottom sufficiently for the paint to have something to grip onto. Which some paints need more roughed up surfaces for good adhesion than do others.
__________________

__________________

The Uncommon Thing, The Hard Thing, The Important Thing (in Life): Making Promises to Yourself, And Keeping Them.
UNCIVILIZED is offline   Reply With Quote
Old 31-10-2017, 14:16   #3
Registered User

Join Date: Oct 2009
Location: Out cruising
Boat: Bruckmann 50
Posts: 556
Re: Bottom paint flaking off

Quote:
Originally Posted by dmksails View Post
I had my boat hauled and the bottom painted back in Jan-Feb. The boat was put back in the water in May. Today I had a diver replace the zinc on the propeller and he noticed a hand-size patch of bottom paint that flaked off the hull.

She's only been in the water for 5 months and only away from the slip twice and never ran into anything. Is this something that the yard should repair?

If not the yard, what are my options for dealing with this?
Before you blame the yard too much be sure the underlying layers were not coming off too. We had an older boat that we were fortunate enough to change the color on the bottom. The problem wasn’t the paint we applied coming off it was several of the previous layers separating. You could see the old paint color on both sides of the chip that fell off. We ended up getting the bottom stripped and repainted because no amount of sanding and prepping worked unless you actually got down to barrier coat.

Jim
jkleins is offline   Reply With Quote
Old 31-10-2017, 15:07   #4
Registered User
 
Suijin's Avatar

Join Date: Feb 2013
Location: Annapolis MD; currently in Oriental NC
Boat: Valiant 40
Posts: 3,527
Re: Bottom paint flaking off

Yeah there is not enough information to know why it came off and who is responsible.

What kind/brand of paint was on the boat previously? What was the condition of the old paint? How was the bottom prepped for the new paint? What new paint was applied?

If a hand-sized piece "flaked" off, I suspect that one of the older layers flaked off and took the new paint with it. But that's just a hypothesis in the absence of more information. If the old paint was rough and "alligatored" with previous flaking and was not taken down/prepped adequately, then it's not surprising that a big chunk came off, and more will likely come off over time.
Suijin is offline   Reply With Quote
Old 01-11-2017, 10:41   #5
Registered User

Join Date: Aug 2015
Location: Port Townsend, WA
Boat: Tashiba-31
Posts: 269
Images: 1
Re: Bottom paint flaking off

Here is a picture of the affected area. It is less than palm size in area. The old bottom was ablative as is the new one. I'm asking the yard what they used.

Putting aside any blame for now, what do I need to do about this? Do I have to haul out immediately or is this something that would wait for the next haul-out?
Attached Thumbnails
Click image for larger version

Name:	Bottom Flake.JPG
Views:	35
Size:	178.4 KB
ID:	158652  
dmksails is offline   Reply With Quote
Old 01-11-2017, 10:51   #6
Registered User
 
phantomracer's Avatar

Join Date: Aug 2010
Location: Boston, MA
Boat: 1968 Ohlson 38 Sloop
Posts: 806
Images: 9
Send a message via Yahoo to phantomracer
Re: Bottom paint flaking off

how many layers? I try and keep no more than 2-3 on the boat at any time. I repaint (alblative) when the barrier coat starts to come through, then put one coat on. Usually lasts 2 seasons per coat here in the Boston area.

The issue is either in poor prep by the boat yard, incompatible paints, or too many layers on the hull

Not an emergency. deal with it when it comes out of the water.
__________________
Paul S
Blog - https://www.facebook.com/ohlson38project
website http://www.mildredrose.com
phantomracer is offline   Reply With Quote
Old 01-11-2017, 12:45   #7
Registered User
 
Suijin's Avatar

Join Date: Feb 2013
Location: Annapolis MD; currently in Oriental NC
Boat: Valiant 40
Posts: 3,527
Re: Bottom paint flaking off

Quote:
Originally Posted by dmksails View Post
Here is a picture of the affected area. It is less than palm size in area. The old bottom was ablative as is the new one. I'm asking the yard what they used.

Putting aside any blame for now, what do I need to do about this? Do I have to haul out immediately or is this something that would wait for the next haul-out?
To me that looks like failure of the underlying paint layer, but it's hard to tell. You can see a deeper chunk came out too, and the cracking along the top edge at one point looks like the same deal. But you won't really know until you haul out next and can get a closer/better look at what's going on.

As for what do do, it's fine until the next haul out. Not going to damage the boat. At most you'll have more bottom growth growing there. That said, I'd be prepared for more paint loss to occur over time.
__________________

Suijin is offline   Reply With Quote
Reply

Tags
bottom paint, paint

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
To Bottom Paint, or Not to Bottom Paint (or Just a Touch-Up) OrangeCrush Monohull Sailboats 43 20-04-2018 07:43
Bottom Paint over Bottom Paint Adrenaline Construction, Maintenance & Refit 3 13-02-2016 13:05
New Bottom Paint Peeling off Old Paint catalina38 Construction, Maintenance & Refit 1 26-02-2013 13:02
Bottom Paint For Textured Bottom chas5131 Construction, Maintenance & Refit 2 29-08-2012 00:07
Flaking Paint smilingbobby Construction, Maintenance & Refit 4 21-09-2010 01:51



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:50.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.