Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-09-2016, 07:20 AM   #1
2 Rivet Member
 
gYpsydreamin's Avatar
 
1975 31' Sovereign
Waldorf , Maryland
Join Date: Jul 2014
Posts: 29
Cutting new subfloor today

I'm planning to cut the wood for my new subfloor today but I want to make sure what I'm doing isn't a terrible idea. I've only cut out about a foot of my old subfloor, in the very rear. Is it okay to replace such a small amount back there? Should I cut further back past a crossmember?
Click image for larger version

Name:	ImageUploadedByAirstream Forums1457529652.723820.jpg
Views:	200
Size:	106.8 KB
ID:	258459
__________________

__________________
gYpsydreamin is offline   Reply With Quote
Old 03-09-2016, 05:01 PM   #2
4 Rivet Member
 
rugjenkins's Avatar
 
1975 Argosy 28
Springville , Alabama
Join Date: Apr 2010
Posts: 424
Sure. If that is the extent of the rot. Many have patched and spliced. Put a few overlapping pieces on the bottom from the old to new after you attach it to the frame. Some will disagree but structurally it will be fine.
__________________

__________________
Matt
rugjenkins is offline   Reply With Quote
Old 03-10-2016, 10:58 PM   #3
4 Rivet Member
 
sgschwend's Avatar
 
1986 25' Sovereign
2008 F350, 6.4L diesel , Oak Harbor, WA
Join Date: Sep 2015
Posts: 436
Images: 11
I agree, get the new ply into the channel and then when you splice just glue and screw together.
__________________
sgschwend is offline   Reply With Quote
Old 03-11-2016, 07:58 AM   #4
3 Rivet Member
 
brokeboater's Avatar
 
Currently Looking...
High Springs , Florida
Join Date: Jul 2006
Posts: 148
I'm no expert and I've seen commentary by some I respect that say the method weakens the structure, but I did pretty much what you are doing. I cut mine back maybe 18/24" and then another 8" for a splice. I made a cardboard template to make sure my repair piece would fully insert into the channel. I epoxied the whole thing, drove it fully into the channel and replaced all the bolts connecting the shell to the trailer. I screwed in 6" plywood supports under each side of the remaining opening then inserted my two piece 8" splice, driving both sections fully into the channel also. Seems pretty rock solid to me but if the back end of my trailer falls off on the road somewhere I'll post pictures, if I can ever figure out how to post pictures on here.
__________________
brokeboater is offline   Reply With Quote
Old 03-11-2016, 09:45 AM   #5
Rivet Master
 
Minno's Avatar

 
1972 31' Sovereign
Lexington , Minnesota
Join Date: Feb 2009
Posts: 3,323
The only issue with putting a gusset underneath the seam is if that's where the waste tanks go. You'll lose 3/4" of space for the tanks because of the gusset. If the tanks don't go there, then no issues provided the remaining piece of plywood is still sound. Use good exterior wood glue, epoxy, or gorilla glue (or similar).
__________________
Minno is offline   Reply With Quote
Old 03-11-2016, 12:08 PM   #6
Oldmanvader
 
1973 27' Overlander
1967 26' Overlander
Surrey , British Columbia
Join Date: Jun 2015
Posts: 9
Floor replacement

I have done both, generally I try to find a crossmember wherever possible. In all my floor replacement I always resin coat at least the edge, about 3 or 4 inches in, especially at the back. In my 73 I coated the whole rear bath floor (top only) in resin to limit any future water intrusion. I Used marine grade plywood as well. The rears of vintage airstreams are particularly vulnerable in rear bath models. Good luck, you will appreciate the work once it is all done!
__________________
oldmanvader is offline   Reply With Quote
Old 03-11-2016, 12:35 PM   #7
Rivet Master
 
1998 30' Excella 1000
Livingston , Texas
Join Date: Jan 2014
Posts: 546
I'm not familiar with your floor plan, but if that seam is in an exposed area where you will walk, you might feel it flex if it doesn't have a gusset or lie on a cross-member.
__________________
Siegmann is offline   Reply With Quote
Old 03-14-2016, 04:40 PM   #8
3 Rivet Member
 
Tbeck11931's Avatar
 
1990 34' Limited
2013 23' FB Flying Cloud
Conroe , Texas
Join Date: Jul 2012
Posts: 167
I went to a cross member for structural integrity.
__________________
Tbeck11931 is offline   Reply With Quote
Old 03-15-2016, 03:29 AM   #9
2 Rivet Member
 
gYpsydreamin's Avatar
 
1975 31' Sovereign
Waldorf , Maryland
Join Date: Jul 2014
Posts: 29
So if you went to a cross member, did you have the two ends (the old but good floor and the new piece of floor) meet and share one crossmember together?
__________________
gYpsydreamin is offline   Reply With Quote
Old 03-15-2016, 05:42 AM   #10
2 Rivet Member
 
1971 18' Caravel
1970 27' Overlander
Vintage Kin Owner
Hawthorne , Florida
Join Date: Nov 2015
Posts: 82
I presume you've looked underneath and made sure that the next cross member is ok. I was going to do something like you're doing and oops! Looks like the cross member has succumbed to moisture.
__________________
sandgrubber is offline   Reply With Quote
Old 03-15-2016, 06:00 AM   #11
Rivet Master
 
MarkR's Avatar
 
1951 21' Flying Cloud
1960 24' Tradewind
Folsom , California
Join Date: Dec 2003
Posts: 725
Images: 12
Just to be clear, the gusset plate should be continuous from outside edge to outside edge (except at the main frame rails). It should be 6" wide min. (3" overlap (or "underlap") per side). I'd use 3/4 CDX (or better) Plywood. Glue and Screw w/ "deck screws" (or some other "substantial" wood screw) at something like 3" on center staggering back and forth (side to side) on each side of the lap. It'll end up being stronger than an un-interrupted piece (in my opinion anyway . . . your mileage may vary)
__________________

Aluminumbskull with Led Balloon in Drag
***
Birch Plywood and Aluminum go together like
Peanut Butter and Chocolate
MarkR is offline   Reply With Quote
Old 03-16-2016, 07:52 AM   #12
3 Rivet Member
 
Tbeck11931's Avatar
 
1990 34' Limited
2013 23' FB Flying Cloud
Conroe , Texas
Join Date: Jul 2012
Posts: 167
Quote:
Originally Posted by gYpsydreamin View Post
So if you went to a cross member, did you have the two ends (the old but good floor and the new piece of floor) meet and share one crossmember together?

I ran my skill saw with the depth set where it cut 90% through the old subfloor and then made my cut halfway over the support beam.
Make sure the saw blade cannot come in contact with the support beam and there are no screws or bolts in your path.
That way my new floor overlapped the support beam and the adjacent old floor is still supported by the beam.
I found pressure treated plywood at my local lumber yard. (Not easy to locate).
After I cut my new piece I painted the outside edge and all cut locations with kilz paint for added protection.
Maybe over kill but that's the aircraft mechanic in me. Lol
__________________
Tbeck11931 is offline   Reply With Quote
Old 03-16-2016, 02:00 PM   #13
2 Rivet Member
 
gYpsydreamin's Avatar
 
1975 31' Sovereign
Waldorf , Maryland
Join Date: Jul 2014
Posts: 29
Tbeck, so you did indeed have two ends of wood both meeting and sharing the support of one crossmember. Did you secure either piece of wood to that cross member? Seems difficult to do since the cross members aren't but so thick.
__________________
gYpsydreamin is offline   Reply With Quote
Old 03-17-2016, 12:21 AM   #14
3 Rivet Member
 
Tbeck11931's Avatar
 
1990 34' Limited
2013 23' FB Flying Cloud
Conroe , Texas
Join Date: Jul 2012
Posts: 167
Yes
If the crossmember is 2" wide you cut the old floor out 1" over the crossbeam.
When a carpenter installs new roof decking he always puts the edge of the OSB or plywood halfway over a ceiling joist or rafter.
Just adds strength to your new floor.
__________________

__________________
Tbeck11931 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
Advice needed - Cutting new AC in '64... robwok Furnaces, Heaters, Fireplaces & Air Conditioning 4 05-26-2011 12:31 PM
New black tank, cutting a new hole? akmntman Waste Systems, Tanks & Totes 8 07-24-2010 12:19 AM
New subfloor for new hardwood floors joe77 Repairing/Replacing Floor &/or Frame 0 10-24-2009 11:57 AM
RV Story in USA Today--Today SteSpot On The Road... 0 05-18-2009 03:14 PM
Today's today, You know what that means? codybear Off Topic Forum 20 11-09-2006 12:31 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:14 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.