Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-15-2016, 09:23 AM   #1
1 Rivet Member
 
1962 24' Tradewind
Springfield , State
Join Date: May 2015
Posts: 8
Under floor insulation??

Hi all, I'm doing a frame off restoration on my 62 trade wind. I'm almost to putting new belly skin on and was wondering what others would recommend for insulation. I was thinking about 4 x 8 sheets of the pink closed cell foam, cutting it to fit and screwing it on in between the frame sections.

Any other ideas and can anyone confirm that insulating is worth the time effort and cash?

Thanks in advance!

Scott P
__________________

__________________
Scott P. is offline   Reply With Quote
Old 06-15-2016, 10:22 AM   #2
Rivet Master
 
Belegedhel's Avatar
 
1973 21' Globetrotter
Houston , Texas
Join Date: Sep 2009
Posts: 2,198
I did essentially what you are thinking of doing: a couple layers of closed cell foam with a final layer of she shiny bubble wrap looking down. Held in place with spray adhesive and screws with big plastic washers. Thickness of my assembly is about 1.5". I figured that it didn't make sense to obsess about the insulation in the walls and then leave the floor completely uninsulated. Can't really tell if it makes a difference or not, since I don't have anything to compare to. Just beware that if you have or will have tanks under your floor and inside your frame, that yo won't be able to insulate very thick, or maybe at all where the tanks go.

good luck!
__________________

__________________
Belegedhel is offline   Reply With Quote
Old 06-15-2016, 10:24 AM   #3
1 Rivet Member
 
1962 24' Tradewind
Springfield , State
Join Date: May 2015
Posts: 8
Thanks for the info!
__________________
Scott P. is offline   Reply With Quote
Old 06-19-2016, 11:08 PM   #4
2 Rivet Member
 
AlbertaBound's Avatar
 
1975 Argosy 28
1975 Argosy 22
1978 Argosy Minuet 6.0 Metre
Camrose , Alberta
Join Date: Aug 2013
Posts: 73
I decided not to insulate my floor. I typically do not use my trailer in extreme heat or cold. Just an occasional weekend. If I was full timing I would have insulated.
__________________
AlbertaBound is offline   Reply With Quote
Old 10-31-2016, 11:06 AM   #5
2 Rivet Member
 
1960 24' Tradewind
Tipp City , Ohio
Join Date: Aug 2015
Posts: 26
Has anyone had any luck using mineral wool insulation under floor? Roxul?
__________________
streaming24 is offline   Reply With Quote
Old 10-31-2016, 11:23 AM   #6
2 Rivet Member
 
1974 25' Tradewind
Calgary , Alberta
Join Date: Jul 2015
Posts: 69
Quote:
Originally Posted by streaming24 View Post
Has anyone had any luck using mineral wool insulation under floor? Roxul?
I think that will be our choice. But I won't use Airstream's method of retaining the batts (which is, to lay it down across the frame members and then crush it down with the wood floor. I think the notion of spray adhesive would work for when the material is first installed but then you have to expect the fibers to slowly separate over time. I will probably cut strips of Coroplast about 1.5 to 2 inches wide to act as bottom side straps, and use 3 inch screws to attach them to the floor from below. That way the insulation should stay out of the way of whatever moisture ends up on the bottom sheet metal. I know the Roxul is hydrophobic but the more you keep it away from moisture the better it will be.
__________________
Alumineer is offline   Reply With Quote
Old 10-31-2016, 12:20 PM   #7
Site Team
 
, Minnesota
Join Date: Aug 2003
Posts: 6,940
Images: 59
Quote:
Originally Posted by streaming24 View Post
Has anyone had any luck using mineral wool insulation under floor? Roxul?
I also thought the original method was less than satisfactory. I used 3" fiberglass batts, held off the bellyskin with steel strips.

I don't think Coroplast was available, or I wasn't aware of it at the time. I might go that route if doing it today.
Attached Thumbnails
Click image for larger version

Name:	DSC00012.JPG
Views:	172
Size:	60.4 KB
ID:	274590   Click image for larger version

Name:	insulation01.JPG
Views:	189
Size:	59.6 KB
ID:	274591  

__________________
markdoane is offline   Reply With Quote
Old 10-31-2016, 08:05 PM   #8
2 Rivet Member
 
1992 29' Excella
seattle , Washington
Join Date: May 2016
Posts: 20
concerned about water sloshing about

I too am trying to figure out what type of insulation to use instead of the pink stuff for my sub floor. I am replacing only the front and rear sections of sub floor, but in so doing, I've definitely noticed areas under the good parts of the sub floor with sloshy insulation. (times like these I wish I had x-ray vision)

Plan after finding and repairing all leaks.
1. get all sloshy insulation all dried out otherwise it will just rot the remaining floor sections
2. cover the holes in frame with a rubber plug or spray foam insulation to prevent water from coming in from below. But I also think this is a way for water to get OUT so I need advice. IF I cover holes in frame, I was thinking of putting some vents UPWARD into the floor to allow any water that got trapped down there a chance to evaporate.
3. use either rigid foam OR that space suit (silvery) insulation
__________________
stephseattle is offline   Reply With Quote
Old 11-01-2016, 08:57 AM   #9
Rivet Master
 
Belegedhel's Avatar
 
1973 21' Globetrotter
Houston , Texas
Join Date: Sep 2009
Posts: 2,198
Don't seal up your belly pan or things will never dry out. That being said, you don't want gaps and holes that are big enough to allow rodents in, those should be patched, but not sealed.
__________________
Belegedhel is offline   Reply With Quote
Old 11-02-2016, 08:43 AM   #10
2 Rivet Member
 
1960 24' Tradewind
Tipp City , Ohio
Join Date: Aug 2015
Posts: 26
Under floor indulation

What about between new grey tank and plywood floor? Insulation? Vapor barrier? Nothing?
__________________
streaming24 is offline   Reply With Quote
Old 11-02-2016, 09:32 AM   #11
4 Rivet Member
 
rugjenkins's Avatar
 
1975 Argosy 28
Springville , Alabama
Join Date: Apr 2010
Posts: 424
Rigid foam is lite and insulates good with no water retention. Click image for larger version

Name:	ImageUploadedByAirstream Forums1478097151.521785.jpg
Views:	219
Size:	87.0 KB
ID:	274681
Batts of anything may collect moisture.
__________________
Matt
rugjenkins is offline   Reply With Quote
Old 12-19-2016, 05:25 PM   #12
New Member
 
1966 30' Sovereign
Boulder , Colorado
Join Date: Apr 2016
Posts: 3
What thickness/R Value did you go for with this material? I am finishing (tomorrow?!!) replacing my entire subfloor and the Mrs wants toasty toes. I see that rigid foam from HD comes in a full range 2 to 7 and $11-20. Is there a diminishing return at some point?
__________________
Garrett7m is offline   Reply With Quote
Old 12-22-2016, 09:00 AM   #13
1977 31' Excella 500
 
1977 31' Excella 500
Dallas , Texas
Join Date: Feb 2016
Posts: 68
On fiberglass batts. please read installation instructions. I believe the paper is a moisture barrier and faces the conditioned airspace. Also, I believe fiberglass insulation should dry out if water is not ponding and wicking up constantly.
__________________
Jack Moore is offline   Reply With Quote
Old 12-22-2016, 09:47 AM   #14
Rivet Master
 
r carl's Avatar
 
Vintage Kin Owner
Lin , Ne
Join Date: Dec 2009
Posts: 2,056
Quote:
Originally Posted by streaming24 View Post
Has anyone had any luck using mineral wool insulation under floor? Roxul?
Rock wool in the walls and ceiling for sure. Fiberglass batting should not be considered for a camper. Blue or pink board can be fitted under the floor.
__________________

__________________
The higher your expectations the fewer your options.
r carl 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
Insulation under the floor vanster Repairing/Replacing Floor &/or Frame 7 03-06-2015 08:57 AM
Under floor insulation? colin57 Repairing/Replacing Floor &/or Frame 10 05-02-2011 03:15 PM
What insulation did you use under the floor? adwriter73 Repairing/Replacing Floor &/or Frame 32 03-04-2010 09:01 AM
Should there be insulation under the floor? rlindberg Interior Restoration Forum 9 05-18-2009 12:10 PM
Under floor insulation Rick Alston Repairing/Replacing Floor &/or Frame 18 01-26-2004 09:02 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:02 AM.


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.