Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-13-2019, 10:54 AM   #21
Guru
 
Steve DAntonio's Avatar


 
City: Deltaville
Join Date: Dec 2015
Posts: 1,069
Quote:
Originally Posted by Dixie Life View Post
In need of advice. Ran across a boat for sale I like. After investigating found out it has leaks that got into the cored hull above the waterline. This info came from people in the harbor. I really like the boat and need some advice on how big of a problem this may be. Could I find and stop the leaks and repair the damage? Or is a cored hull boat just not worth the trouble. Don't need to get in the weeds with a lot of details, just some opinions on leaking cored hulls.

Thanks
Cored decks, cabin and hull above the WL are very common, essentially most FRP vessels are built this way. Many lighter planing vessels also core below the WL. The latter is by no means a deal killer, but buyers need to be wary of potential water intrusion, which can occur in any of these locations, and especially below the WL for obvious reasons, water is entering the core under pressure rather than simply leaking in (it can also enter from the bilges). In many cases water intrusion is the result of after market installations, antennas on deck, transducers below the WL (several years ago I encountered a 26 foot planing vessel, 4 years old, wherein virtually the entire bottom was "wet", the result of an improperly installed transducer on the transom, making the vessel all but un-sellable)

Under no circumstances should caulk be the sole barrier between water and core. Caulk's life is finite and when it fails you have no way of knowing, so a water path to core that relies on caulk is only a delayed certainty for wet core. All core penetrations, above and below the WL, should be properly and permanently closed out.

Also, many surveyors do not use moisture meters because they do not trust the results, and that's a good thing. Moisture meters should only be used by those who know how to use them and are able to interpret the results. For instance, a moisture meter will read a block of ice as dry, and a sheet of metal as wet. I carry two with me on every FRP vessel inspection. More on moisture meters here https://stevedmarineconsulting.com/p...-construction/

This article delves into the subject of cored composite construction in detail https://stevedmarineconsulting.com/c...deck-hardware/

The subject is also covers moisture meters and wet core starting on page 109 http://stevedmarineconsulting.com/wp...ing-With-1.pdf
__________________
Steve D'Antonio Marine Consulting, Inc.
https://www.stevedmarineconsulting.com
Steve DAntonio is offline   Reply With Quote
Old 02-13-2019, 11:27 AM   #22
Guru
 
MurrayM's Avatar
 
City: Kitimat, North Coast BC
Vessel Name: Badger
Vessel Model: 30' Sundowner Tug
Join Date: Jul 2012
Posts: 5,946
Here's one cored hull vessel I wouldn't kick out of bed:

https://www.devlinboat.com/wordpress...03/sockeye-42/

https://www.yachtworld.com/boats/200...awler-2722005/
__________________
"The most interesting path between two points is not a straight line" MurrayM
MurrayM is offline   Reply With Quote
Old 02-14-2019, 05:40 AM   #23
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 22,553
". Caulk's life is finite and when it fails you have no way of knowing, so a water path to core that relies on caulk is only a delayed certainty for wet core."

These words of wisdom should be painted near the control position of almost every boat built.

Too many folks do not realize replacing calk is required PM , much ungood to wait till the deck rots and water pours into your bunk.
FF is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 04:34 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012