Reply
 
Thread Tools Display Modes
 
Old 05-15-2008, 02:04 PM   #1
Veteran Member
 
wingspar's Avatar
 
City: Blaine
Vessel Name: White Star
Vessel Model: Canoe Cove
Join Date: Jan 2008
Posts: 79
Plywood pilothouse repair

I'm looking into purchasing an 1970's trawler where the superstrcuture is glassed over plywood. Several area have leaked and is starting to rot the inner teak plywood. What is the proper method for repair as simply removing all the interior plywood doesn't seem like a good idea as the roof would cave in.

Dave
__________________
Advertisement

wingspar is offline   Reply With Quote
Old 05-16-2008, 03:44 AM   #2
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,534
RE: Plywood pilothouse repair

What is the proper method for repair as simply removing all the interior plywood doesn't seem like a good idea as the roof would cave in.


Cut off the entire house and rebuild it , in plywood for the short life, or in foam core for an unlimited service life.

Otherwise cut 2 ft wide slices out and replace them one at a time.

The cost of all this work is why these boats can be well done , well equipped and under $20K.

For a real patch job make up your own Git Rot and inject a few gallons where its really punky.

Don't venture out in the blue water afterwards.but the loop should be fine.

FF
__________________

FF is offline   Reply With Quote
Old 05-16-2008, 09:18 AM   #3
Veteran Member
 
wingspar's Avatar
 
City: Blaine
Vessel Name: White Star
Vessel Model: Canoe Cove
Join Date: Jan 2008
Posts: 79
RE: Plywood pilothouse repair

What I'm thinking is removing 2 to 3 foot sections of the teak faced plywood. I'm hoping the remaining fiberglass is thick enough to hold its shape. Build this up to about 1/4 inch with additional fiberglass and epoxy. Glass in some new 3"x3/8" fir battons running vertical spaced every foot or so. The new plywood would then be attached to the battons. Working around the house until all has been replaced.

Dave
wingspar is offline   Reply With Quote
Old 05-16-2008, 12:12 PM   #4
Senior Member
 
Join Date: Oct 2007
Posts: 138
RE: Plywood pilothouse repair

I've alsways believed if its rotten take it all out. before its over you'll be doing it anyway.
LarryW is offline   Reply With Quote
Old 05-19-2008, 10:42 AM   #5
Guru
 
Phil Fill's Avatar
 
City: Everett Wa
Country: US
Vessel Name: Eagle
Vessel Model: Roughwater 58 pilot house
Join Date: Oct 2007
Posts: 2,919
RE: Plywood pilothouse repair

You can repair from either side, so I would repair the side that is in the worse shape or has to be replaced.* The area cut out should be no larger than you can reach/work and back/in to good wood about 6 ft to secure/anchor into.* Save the old pieces as a pattern. You can by 4X8 pre make fiber glass sheets that you can epoxy to new plywood or epoxy the old.* ******

*
If you need more information/help let us know. We can sort of walk you through it. I have replaced the entire PortugueseBridge from the inside, under the 4 salon windows from the out side and same areas in the roof from the in and out side.* Not hard or expensive if you do it yourself. *
Phil Fill is offline   Reply With Quote
Old 05-19-2008, 05:03 PM   #6
Senior Member
 
Chris Foster's Avatar
 
City: Anacortes, WA
Country: USA
Vessel Name: Juz-B-Cuz
Vessel Model: 38' Rawson Trawler
Join Date: Oct 2007
Posts: 278
RE: Plywood pilothouse repair

Take a look at the CHB owners' group on Yahoo:

http://groups.yahoo.com/group/CHB/

There are numerous threads on different ways folks have done this repair - from filling with an epoxy slurry to cutting out the interior glass and replacing the plywood from the inside to doing the same from the outside. There are a few links to photo sites with detailed step-by-step photo logs of the whole process.

Sounds like you may have a little different situation - I guess you don't have a glass sandwich but rather just a plywood structure with glass on the outside?
Chris Foster is offline   Reply With Quote
Old 05-20-2008, 04:15 AM   #7
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,534
RE: Plywood pilothouse repair

The hassle with GRP is always stiffness.

The fiberglass thin skim that was supposed to keep the tain out for a while is not stiff enough even with " Build this up to about 1/4 inch with additional fiberglass and epoxy".

You will do best simply making light cuts in the inner surface of the replacement plywood , shmeering it with thickened epoxy (so it wont drain while curing) and pushing it in place to cure.

Finish the inside with paint or purchase a teak vineer and contact spray it up.

For a more EZ to clean surface formica is the traditional.

FF
FF is offline   Reply With Quote
Old 05-20-2008, 06:24 AM   #8
TF Site Team
 
Baker's Avatar
 
City: League City, Tx
Country: Texas
Vessel Model: Carver 356
Join Date: Oct 2007
Posts: 5,633
RE: Plywood pilothouse repair

Formica, baby, formica!!! It is also quite common to just rip it out and replace with formica. Obviously you want to keep enough teak trim to give that yachty feel but it can be tastefully done and still look quite good and last forever. I do know that boatyards will do this for you as well...... my wife is related to the business. Their yards do "formica jobs".
Baker is offline   Reply With Quote
Old 05-20-2008, 12:39 PM   #9
Veteran Member
 
wingspar's Avatar
 
City: Blaine
Vessel Name: White Star
Vessel Model: Canoe Cove
Join Date: Jan 2008
Posts: 79
RE: Plywood pilothouse repair

CHris:

What I'm looking at is a plywood house that has been fiberglassed over similar to the Pre 1978 CHB 34. I've tried to get into the CHB forum but need to be approved by the moderator.

Fred:

Removing the old plywood and building up the thickness of the outside fiberglass and installing vertical battons upon which the new plywood can be screwed to and a teak veneer glueed over it should be plenty stiff.

Sorry no formica in my boat, that is assuming I buy this one.

Dave
wingspar is offline   Reply With Quote
Old 05-21-2008, 04:20 AM   #10
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,534
RE: Plywood pilothouse repair

Removing the old plywood and building up the thickness of the outside fiberglass and installing vertical battons upon which the new plywood can be screwed to and a teak veneer glueed over it should be plenty stiff.

We will see when the first 5ft wave top climbs aboard .There a BIG hammer!

FF
__________________

FF is offline   Reply With Quote
Reply

Thread Tools
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pilothouse Windows stevensibs General Maintenance 42 03-08-2015 12:44 PM
Plywood swim platform? Daddyo General Discussion 31 06-03-2012 08:45 PM
Teak Plywood De laminating? larrylwill General Discussion 9 04-20-2011 05:04 PM
Interesting CRP on plywood concept. FF General Discussion 6 05-05-2010 10:02 PM
plywood fuel tanks sirkarl Power Systems 5 01-17-2009 06:19 PM




All times are GMT -5. The time now is 01:56 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012