Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-05-2017, 08:17 AM   #1
1 Rivet Member
 
1968 26' Overlander
Bonnington , British Columbia
Join Date: Mar 2017
Posts: 10
HELP! Replacing the sub floor leaving the shell on

We're about to replace the sub floor of our '68 Overlander, leaving the shell on and just wedging under the shell and the C channel ( or is it called the U channel?)
Any tips or advice would be so appreciated. I've done some research and I came up with two posts, one the job stopped half way through and the other one is informative but slightly confusing.
Thanks in advance!
__________________

Tracy Lynne is offline   Reply With Quote
Old 05-05-2017, 08:29 AM   #2
Rivet Master
 
Belegedhel's Avatar
 
1973 21' Globetrotter
Houston , Texas
Join Date: Sep 2009
Posts: 2,563
Try doing a google search from outside the forums using search terms like "airforums shell on floor replacement"--I just tried this and got half a dozen hits.

So my thoughts are that doing a floor replacement with the shell on is the hard way to do it. The things that make it especially difficult is wedging the plywood under the wall with the shell not fastened to the frame. You run the risk of knocking the edge of the shell off the outriggers, and if the whole thing comes off, this could be disastrous. Many people who do a shell-on floor replacement split the sheets of plywood down the middle and then scab them back together once both pieces are in place.

I always recommend building the standard wooden gantries, and lifting the shell. Once the shell is off, the gantries can be used to flip the frame during all the frame repair and painting. The under floor insulation, bellypan, new axles, and any retrofit tanks can be installed with the frame upside down, then flip it back over and set the shell back in position. Later, you can use the gantry frames as the basis for scaffolding while you replace an air conditioner, or reseal roof penetrations.

good luck!
__________________

Belegedhel is online now   Reply With Quote
Old 05-05-2017, 09:21 AM   #3
3 Rivet Member
 
1973 23' Safari
1970 27' Overlander
Boerne , Texas
Join Date: Jun 2015
Posts: 185
I did a shell on subfloor replacement. I admit, the best way to do this is shell off - but I did not have any help but had time. I was able to do it without getting the plywood in sections by getting a lot of tips on this site. One can clamp on some "extenders" to the outriggers to keep the shell from falling off as you wedge the plywood into the C-channel. For the back piece of subfloor, I did jack up the shell a couple inches and slide in the piece from the rear. There are some description of this in the forums. Straps with ratchets worked well to draw the lower shell back in once the subfloor was in place. All in all, turned out well and was not that bad.
Greg
Greg1410 is offline   Reply With Quote
Old 05-05-2017, 09:57 AM   #4
3 Rivet Member
 
mikextr's Avatar
 
1967 26' Overlander
Bugtussle , Oklahoma
Join Date: May 2014
Posts: 220
Here's the method I used: I lifted the shell from the inside by extending a 2x4 across the inside of the trailer about 12 inches above the frame and then fastened the 2x4 to the corresponding right and left ribs with (2) 1/4 inch bolts on each end. Next, I rested a section of 2x6 on the frame below the 2x4 and placed a bottle jack under each end of the 2x4 near the ribs making sure the jacks were firmly supported by the 2x6 on the frame. All I had to do was jack up the bottle jacks a little bit at time on each side and I was easily able to lift the shell a couple of inches allowing me to slide the new plywood into place as a single section from the inside. After finishing a section, I just moved my bottle jack rigging down to the next section. Getting the plywood into place was the hard part. Big hammers, prybars, ratcheting straps, and strong backs are a must. Sorry I don't have any pics handy.
__________________
1967 Overlander International 26ft
2006 Porsche Cayenne Turbo S 520hp 530ft-lbs torque 7700lb towing capacity
mikextr is offline   Reply With Quote
Old 05-07-2017, 09:26 AM   #5
1 Rivet Member
 
Currently Looking...
Bend , Oregon
Join Date: Mar 2013
Posts: 5
You Need A Really Good Reason To Do A Shell-on Restoration

I am restoring a 1964 28 foot long streamline empress trailer. Very similar in construction to an airstream of that era.

75% of the plywood subfloor had water damage and needed to be replaced. I decided to leave the Shell on to replace the subfloor. I just finished doing that, and I think I regret it. My primary reason for leaving the Shell on was concern about the gold anodized aluminum trim on the outside of the trailer down at the bottom of the exterior walls. I would've had to drill out many many gold anodized rivets, and I was concerned about being able to get replacement rivets of the same color. Also, I was going to do this part of the work In the midst of a very cold winter, and I thought it expedient to work inside the warmth of a heated trailer.

I ended up getting all the floor replaced and I am happy with the outcome however Ended up spending many many hours on my hands and knees, getting up and down and that in itself was exhausting. Also there were many hours of frustration removing the floor in tight spaces, I definitely should have removed the cabinets, which I stubbornly left installed out of fear of disturbing their fit and alignment on re-installation.

I think you can expect to find Rust on parts of the frame, and by removing The shell and all of the subfloor it will be much easier to identify and remediate the rust damage. I recommend you purchase or fabricate a gray water tank system and embed it within the frame. Having the frame completely opened that job will be much easier.

If I were to do it all over again I think I would figure out a way to get some new gold anodized rivets and do a shell off restoration.
kmuinch is offline   Reply With Quote
Old 05-10-2017, 09:02 AM   #6
Rivet Master
 
DavidsonOverlander's Avatar

 
1964 26' Overlander
1974 31' Sovereign
Milton , ON
Join Date: Oct 2002
Posts: 978
Images: 4
Either way will work

Floor replacement can be done shell-on or shell-off, and each has their plusses and minuses. We did it shell on. If I had had a big enough indoor space I would have removed the shell.

I started at the rear and as I removed sections of floor I left small pieces where the shell was connected to the frame. I had to do a lot of welding, which would have been easier with the shell off. I didn't find it a problem to get the new plywood into the C-channel. The first section (rear most) I cut in half, but after seeing how easily the rest of the floor went in I think I could have installed it in one piece.

Here's a photo as I was getting started. After replacing the floor I decided to removed all interior skins to re-insulate and rewire. If I'd known from the beginning I was going to do that I would have removed the interior skins before replacing the floor.

__________________
Grant Davidson
Milton, ON

1946 Spartan Manor
1954 Va-Ka-Shun-Ette
1964 Overlander
1965 Avion C-10 Truck Camper (65avion.home.blog)
1974 Sovereign
2005 F-350 SRW 4x4 crew cab long box
TAC ON-5
DavidsonOverlander is offline   Reply With Quote
Old 05-11-2017, 08:27 AM   #7
Rivet Master
 
sgschwend's Avatar
 
1986 25' Sovereign
2008 F350, 6.4L diesel , Oak Harbor, WA
Join Date: Sep 2015
Posts: 580
Images: 13
It has likely been pointed out:
Shell on works well for specific areas, such as a rear bathroom floor. Most trailer only have small areas that need to be fixed.

If you want to replace the interior including the skins then shell off is the way to go.

The trick is to know how far you want to go,
sgschwend is offline   Reply With Quote
Old 05-11-2017, 08:38 AM   #8
Rivet Master
 
Minno's Avatar

 
1972 31' Sovereign
Lexington , Minnesota
Join Date: Feb 2009
Posts: 3,548
We did shell on floor replacement. It's in our thread "Little Girl Refurb" in the '70's section. It took us a weekend and 2 of us to do a 31 ft trailer. Shell off would have been easier in hind sight, but we're NOT going to re-do it now!
It's do-able.

Kay
Minno is offline   Reply With Quote
Old 05-11-2017, 10:30 AM   #9
Rivet Master
 
Dingo Girl's Avatar

 
1967 17' Caravel
Cadillac , Michigan
Join Date: Jul 2009
Posts: 1,185
Images: 3
I did a shell on because of mostly working alone.
There is a lot of crawling around, banged up shins and numerous scrapes.
But I survived and the trailer is now nearing completion.
If I had help I'd have done a shell off.
Dingo Girl is offline   Reply With Quote
Old 05-11-2017, 12:57 PM   #10
Rivet Master
 
Aerowood's Avatar

 
1971 21' Globetrotter
Arvada , Colorado
Join Date: May 2006
Posts: 2,963
I did mine shell on also. Only problem I had was the front sheet at the "C" channel due to the hidden fasteners. It was easily overcome with a Saws All.
__________________

Aerowood is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lift-Off: Leave C-Channel Attached to Shell vs Sub Floor? LifeIsRiveting General Repair Forum 10 01-23-2016 01:21 PM
Replacing sub floor aaronschaefe Repairing/Replacing Floor &/or Frame 5 04-03-2014 11:14 AM
Help!!! Just found rotten sub floor. Leak advice... Modern South Repairing/Replacing Floor &/or Frame 2 02-22-2013 12:37 AM
Sub-Floor with Belly Pan and Shell On Llano Repairing/Replacing Floor &/or Frame 31 09-07-2010 09:06 PM
sub floor replacement help Terry J Repairing/Replacing Floor &/or Frame 13 06-26-2010 09:50 AM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:29 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.