Reply
 
Thread Tools Display Modes
 
Old 08-22-2011, 01:00 PM   #1
Veteran Member
 
Dom61's Avatar
 
City: Grand Island NY
Country: USA
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 81
Replacing Aft cabin Sub Flooring

Hi, I need to replace my sub flooring in my aft cabin of my MT34 any ideas would be great also I think I may need to do the v berth sooner or latter** Thanks Dom
__________________
Advertisement

Dom61 is offline   Reply With Quote
Old 08-22-2011, 02:02 PM   #2
Guru
 
Anode's Avatar


 
City: Missourah
Country: USA
Vessel Name: M/V Scout
Vessel Model: Sundowner Tug 30'
Join Date: Jul 2010
Posts: 645
RE: Replacing Aft cabin Sub Flooring

So what's there now?
__________________

Anode is offline   Reply With Quote
Old 08-22-2011, 02:10 PM   #3
Veteran Member
 
Dom61's Avatar
 
City: Grand Island NY
Country: USA
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 81
RE: Replacing Aft cabin Sub Flooring

Rotted plywood subflooring and teak parquae floors
Dom61 is offline   Reply With Quote
Old 08-22-2011, 03:23 PM   #4
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 5,726
RE: Replacing Aft cabin Sub Flooring

We were on a boat a few weeks ago that had replaced all of the flooring in the galley and the main cabin with teak and holly plywood.* It looked great.* I think this is simlair.

http://www.jamestowndistributors.com...t.do?pid=51940
Larry M is online now   Reply With Quote
Old 08-22-2011, 04:25 PM   #5
Guru
 
ARoss's Avatar
 
City: Chocowinity NC
Vessel Name: My Yuki
Vessel Model: 1973 Marine Trader 34
Join Date: Nov 2007
Posts: 625
RE: Replacing Aft cabin Sub Flooring

Same boat, same problem.* Since mine's 38 years old, I decided just to cover the floor with 1/2" exterior plywood, and cover that with a berber-style carpet remnant I got at the Big Box. I got some binding for the carpet edges, looks pretty good, to my less-than-perfectionist eye.* The salon and fwd cabin decks are ok. Looks to have been old water damage from before the windows were replaced. Not a lot of traffic back there anyway.

*
ARoss is offline   Reply With Quote
Old 08-22-2011, 04:37 PM   #6
Guru
 
Tony B's Avatar
 
City: Joe Wheeler State Park, Al
Country: Cruising/Live-Aboard USA
Vessel Name: Serenity
Vessel Model: Mainship 36 Dual Cabin -1986
Join Date: Jul 2011
Posts: 1,250
RE: Replacing Aft cabin Sub Flooring

Don't use exterior plywood. It is generally crap. Marine grade plywood is the way to go. It is much stronger and wont try to curl up. It is more expensive than exterior grade plywood but this is a one time expense. Find a local cabinet shop and they can usually tell you where to get marine grade plywood at a decent cost. 3/4" should be under $100 per sheet. If you go to a local lumber yard you will probably pay twice that. Buy marine grade at a specialty lumber yard - they will be cheaper than you think.
Tony B is offline   Reply With Quote
Old 08-22-2011, 05:52 PM   #7
Guru
 
ARoss's Avatar
 
City: Chocowinity NC
Vessel Name: My Yuki
Vessel Model: 1973 Marine Trader 34
Join Date: Nov 2007
Posts: 625
RE: Replacing Aft cabin Sub Flooring

Thanks, Tony. This isn't a "permanent" fix of any kind. Not even screwed down. Just something to keep the floor stable enough for carpet and to walk on. I do not think the subfloor is structural, is it? There's really only one spot that's really soft, near the head door, but I laid the plywood down over the whole floor just to keep it even.
ARoss is offline   Reply With Quote
Old 08-22-2011, 06:17 PM   #8
Guru
 
Edelweiss's Avatar
 
City: PNW
Country: USA
Vessel Model: 1976 Californian Tricabin LRC
Join Date: May 2011
Posts: 1,834
Replacing Aft cabin Sub Flooring

As long as, it isn't constantly exposed to water,*it should be fine. *Be sure and*check it over for obvious flaws. *But don't buy something like a poor quality CDX (common house subflooring). *One side will have cracks and open knot holes. *I got a couple of sheets in a bundle recently, where the internal voids, cracks/splits all came together and it was very weak.

Use exterior grade, it is made with phenol-formaldehyde based glue and is water resistant. *I would still seal it to protect it from moisture though.

Larry B

*


-- Edited by Edelweiss on Monday 22nd of August 2011 09:16:40 PM
Edelweiss is offline   Reply With Quote
Old 08-22-2011, 08:29 PM   #9
Guru
 
Keith's Avatar
 
Vessel Name: Anastasia III
Vessel Model: Krogen 42
Join Date: Oct 2007
Posts: 2,716
RE: Replacing Aft cabin Sub Flooring

Exterior plywood will be fine. Marine grade is just exterior grade with no flaws for better looks.
Keith is offline   Reply With Quote
Old 08-22-2011, 08:58 PM   #10
Guru
 
Moonstruck's Avatar
 
City: Hailing Port: Charleston, SC
Country: USA
Vessel Name: Moonstruck
Vessel Model: Sabre 42 Hardtop Express
Join Date: Nov 2008
Posts: 7,848
RE: Replacing Aft cabin Sub Flooring

Marine grade plywood is bonded with the same glue as exterior plywoods.* The difference is that the voids in the cores are plugged or patched to give a core with no voids* This makes it stronger to endure more stress.* For a floor underlayment, their is an underlayment grade that has the first two cores solid to pevent heel penetration.* It comes in nominal 5/8' and nominal 3/4' thickness.* Their faces are plugged and touch sanded.* There is also a nominal 1/4" luan floor underlay and an MDF underlay.* You will pay a hefty premium for marine grade plywood that is meant for hulls and stressed bulkheads.
Moonstruck is offline   Reply With Quote
Old 08-23-2011, 05:44 AM   #11
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,515
RE: Replacing Aft cabin Sub Flooring

In many farm locations the feed stores will sell wood to use as fencing.Can be chewed ,by farm critters, unlike treated wood.

Forget if its cedar or cypress , but its cheap and usually fairly nice wood in terms of grade.

This would make a fine planked floor , sanded and oiled , it would be grand.

The last sheets of "teak & holey" we purchased were 3/4 thick , but the overlay was so thin , I doubt it could be refinished even once!

The current "teak & holey" is testimony to the ignorance of the purchaser for 50 years.

A classic teak and holy flooring has the holey proud about 1/8 of an inch to serve as no skid.

Weather plywood is "better grade" is simple , count the ply's .

a piece of 3/8 ply that is 5 or half inch of 7 layers is FINE.
FF is online now   Reply With Quote
Old 08-24-2011, 03:55 PM   #12
Veteran Member
 
Dom61's Avatar
 
City: Grand Island NY
Country: USA
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 81
RE: Replacing Aft cabin Sub Flooring

I want to replace the entire floor but need ideas on getting under the beds and cabinets DOm
Dom61 is offline   Reply With Quote
Old 08-25-2011, 06:41 AM   #13
Guru
 
Sailor of Fortune's Avatar
 
City: Saint Augustine, Fl.
Country: Port of St Augustine ,FL
Join Date: Sep 2009
Posts: 1,946
Replacing Aft cabin Sub Flooring

I would use MDO one side plywood. It is usually nicer than exterior grade and has the smooth craft paper inpregnated in it. This product is made for road signs and is made to be constantly wet/dry. Cost is about
$32/sheet in 3/8" size. It comes in 3/8 and 3/4", sold at every lumberyard . NOT to be confused with MDF.
I have built skiffs out of this stuff with excellent results. Prime it with kilz, paint with exterior latex house paint and your in biz-cover with carpeting or your choice of flooring!


-- Edited by Sailor of Fortune on Thursday 25th of August 2011 06:47:16 AM
Attached Thumbnails
Click image for larger version

Name:	img_0565.jpg
Views:	79
Size:	214.9 KB
ID:	7156   Click image for larger version

Name:	img_0608.jpg
Views:	84
Size:	148.6 KB
ID:	7157  
Sailor of Fortune is offline   Reply With Quote
Old 08-25-2011, 07:11 AM   #14
Guru
 
ARoss's Avatar
 
City: Chocowinity NC
Vessel Name: My Yuki
Vessel Model: 1973 Marine Trader 34
Join Date: Nov 2007
Posts: 625
RE: Replacing Aft cabin Sub Flooring

Quote:
Dom61 wrote:
I want to replace the entire floor but need ideas on getting under the beds and cabinets DOm
*Sounds like you have an ambitious project!* I assume you've tracked down and fixed the leaks that caused the damage in the first place.
ARoss is offline   Reply With Quote
Old 08-25-2011, 01:40 PM   #15
Veteran Member
 
Dom61's Avatar
 
City: Grand Island NY
Country: USA
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 81
RE: Replacing Aft cabin Sub Flooring

I have already replaced the entire back wall and the roofs were done before I got the boat so I believe that has been done
Dom61 is offline   Reply With Quote
Old 08-25-2011, 09:07 PM   #16
Guru
 
Daddyo's Avatar


 
City: Cruising East Coast US
Country: USA
Vessel Name: Grace
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 2,441
RE: Replacing Aft cabin Sub Flooring

Second the MDO, the stuff is great but heavy! Built new style bars on the last boat out of the 1".
Daddyo is offline   Reply With Quote
Old 08-26-2011, 05:07 AM   #17
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,515
RE: Replacing Aft cabin Sub Flooring

"Second the MDO, the stuff is great but heavy!"

Remember the area under the cabin sole will at times be awash, with bilge water with oil.

I am not convinced MDO long term useful here.

Take a cut off and boil it for an hour and see if at least the glue is OK.
FF is online now   Reply With Quote
Old 09-03-2012, 06:38 PM   #18
Senior Member
 
SeaMoose's Avatar
 
City: Anchor Pointe, Ohio
Vessel Name: Sea Moose
Vessel Model: 1976 34' D/C Taiwanese Trawler
Join Date: Oct 2007
Posts: 136
You can replace the wood under the bunks and the floor by using 3 pieces of marine ply -- and fiberglass tape. Start with the larger bunk on the starboard side, rip out everything but the outer cabinet frame and you can slide the new wood under the existing frame. You'll probably have to raise the stringers a bit by laminating a small strip on top of them.

You probably have a wet, stinky balsa sandwich on both sides where the floor meets the hull, get rid of that and fiberglass the new floor right to the hull...

Do the other side the same way. You end up with one seam not taped on the main sole - (as that would leave a high spot), fill that with epoxy/filler paste and sand smooth. Then lay whatever flooring you want.

This is also your one and only chance to replace water lines to the tanks, and run the wiring to the stern light...

It can be done, good luck.
SeaMoose is offline   Reply With Quote
Old 09-04-2012, 03:42 PM   #19
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,390
Quote:
Originally Posted by ARoss View Post
Thanks, Tony. This isn't a "permanent" fix of any kind. Not even screwed down. Just something to keep the floor stable enough for carpet and to walk on. I do not think the subfloor is structural, is it? There's really only one spot that's really soft, near the head door, but I laid the plywood down over the whole floor just to keep it even.
I would assume that it is structural unless I had it from a reliable source that it was not. I would remove any damaged wood, check what is beneath it, and replace any damaged structure, subfloor, and flooring with equal or better quality materials..

That's just me though, I have learned that it's easier and less expensive to make a repair the right way the first time.
rwidman is offline   Reply With Quote
Old 09-04-2012, 04:26 PM   #20
Senior Member
 
SeaMoose's Avatar
 
City: Anchor Pointe, Ohio
Vessel Name: Sea Moose
Vessel Model: 1976 34' D/C Taiwanese Trawler
Join Date: Oct 2007
Posts: 136
@rwidman - The Floor isn't structural. The stringers on the walls, that help support the decks between the aft engine room bulkhead and the lazerrate bulkhead - they very much are - they contribute to supporting the weight of the aft cabin itself.

This is a boat with a 3/4" solid fiberglass hull from the waterline down, that's what the floor is sitting on.
__________________

SeaMoose 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
M.T. Aft Cabin Bed belizebill Taiwanese Makes 19 04-29-2013 07:03 PM
Mainship 36 Aft Cabin Tony B Marlow - Mainship 3 02-02-2012 10:14 PM
1987 Symbol Aft Cabin pontypool General Discussion 0 07-11-2011 06:50 PM
'73 38' DeFever Aft Cabin Cruiser (wood) Craig Cranic Classifieds 0 06-30-2011 11:07 AM
Flooring Gulf Comanche General Maintenance 7 05-05-2009 12:55 PM




All times are GMT -5. The time now is 02:34 PM.


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