Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-09-2017, 10:43 PM   #1
2 Rivet Member
 
Can't Get There From Here , Maryland
Join Date: Sep 2017
Posts: 25
Question Subfloor protection: 6 mil poly under SMARTCORE vinyl planks?

Hi everyone,

I'm researching options for a full reno and thinking about how to protect the subfloor from water from above. This is for a reno where the belly pan would not go back on, so the wood could breathe in one direction.

Before laying the flooring, why not place a single, continuous layer of 6 mil poly over the entire subfloor, then float the vinyl floor on top of that? I think about the kitchen and the bathroom area, where water could end up sitting on the floor and seep through cracks to sit on the wood, and just the general desire to keep moisture out.

It sounds easier and faster than rolling on 200+ sq feet of sealant before putting the floor down, and is a complete barrier. What do you think?

(I also am considering the feasibility of wrapping this poly around the edges of the plywood before inserting it into the C channel, but that's a separate question.)

Thanks,
e
__________________

elektrik is offline   Reply With Quote
Old 12-10-2017, 06:28 AM   #2
Dazed and Confused
 
Isuzusweet's Avatar

 
Currently Looking...
1983 31' Airstream310
Hillsburgh , Ontario
Join Date: Sep 2012
Posts: 2,867
IMHO opinion, a very very bad idea. Condensation could set in between the plastic and the plywood and any moisture that does manage to get into the plywood would not be able to get out. Your floor would rot from the top down.

It amazes me that people still want to use plywood as a subfloor in an Airstream and not an impervious, non-organic substrate like Coosa. Coosa doesn't absorb moisture, so it will not rot; non-organic material, so it won't promote the growth of fungus or mold; 40-45% lighter than plywood and just as strong, if not stronger.

http://www.coosacomposites.com

Lay it and forget about it. You don't have to epoxy it or glass it.

Pricey? Yes, but you will recoup the cost should you ever sell the trailer as it would show that you used only the best materials in your renovation.

Cheers
Tony
__________________

__________________
Per Mare, Per Terram and may all your campaigns be successful.

Its a recession when your neighbor loses his job; its a depression when you lose your own. "Harry S Truman"
Isuzusweet is offline   Reply With Quote
Old 12-10-2017, 07:28 PM   #3
2 Rivet Member
 
Can't Get There From Here , Maryland
Join Date: Sep 2017
Posts: 25
Quote:
Originally Posted by Isuzusweet View Post
Pricey? Yes, but you will recoup the cost should you ever sell the trailer as it would show that you used only the best materials in your renovation.
Thanks, @Isuzusweet.

I am considering AdvanTech engineered wall/roof sheathing panels (not their subfloor product). Lots of water resistance there, and for a trailer that will be towed exactly once after I renovate it, and parked for 10+ years and used in the summer, I suspect that will suffice.

I looked at Coosa, but at >10x the price, I don't think I can justify it. In a small trailer, sure, but not when I'm going to need 9 or 10 sheets. I need this to last 10-15 years, not 50. I get the resale angle, but that premium would eat up too much of my budget in the short term.

Thanks,
e
elektrik is offline   Reply With Quote
Old 01-22-2018, 08:51 PM   #4
1 Rivet Member
 
1969 27' Overlander
Stockton , California
Join Date: Mar 2012
Posts: 6
Quote:
Originally Posted by elektrik View Post
Thanks, @Isuzusweet.

I am considering AdvanTech engineered wall/roof sheathing panels (not their subfloor product). Lots of water resistance there, and for a trailer that will be towed exactly once after I renovate it, and parked for 10+ years and used in the summer, I suspect that will suffice.

I looked at Coosa, but at >10x the price, I don't think I can justify it. In a small trailer, sure, but not when I'm going to need 9 or 10 sheets. I need this to last 10-15 years, not 50. I get the resale angle, but that premium would eat up too much of my budget in the short term.

Thanks,
e
How much is it?
silvercabin2 is offline   Reply With Quote
Old 01-22-2018, 09:06 PM   #5
Rivet Master
 
A W Warn's Avatar
 
2000 25' Safari
1999 34' Excella
Davidson County, NC , Highlands County, FL
Join Date: Aug 2006
Posts: 2,975
I used some Advantech OSB sheathing last summer when I built a house, it held up well being rained on during construction, but it did swell.
I also use some Advantech plywood sheathing a few years ago in my own house. It held up well being rained on during construction.

Just my opinion:
I would definitely NOT use OSB in a trailer floor. I would use plywood.
I would definitely not use any polyethylene as a water/vapor barrier.
__________________
Alan
2014 Silverado 1500 Crew Cab 5.3L maximum trailering package (yes, I'm towing the 34')
A W Warn is offline   Reply With Quote
Old 01-23-2018, 09:33 AM   #6
Rivet Master
 
rugjenkins's Avatar
 
1975 Argosy 28
Springville , Alabama
Join Date: Apr 2010
Posts: 757
I used the advantech Osb sheets to build my house and used for the new floor in my argosy 8 years ago. I couldn't ask for a more reasonable price worth product for my build. I paid under $250 for the sheets and they are waterproof. I left a few sheets outside in the weather for 2 yrs then found a need for them and was surprised that the still looked unharmed. That's the reason I choose advantec.
__________________
Matt
rugjenkins is offline   Reply With Quote
Old 01-31-2018, 09:33 AM   #7
3 Rivet Member
 
rowdyATX's Avatar
 
1956 26' Cruiser/Overlander
1961 28' Ambassador
Currently Looking...
Austin , Texas
Join Date: Jan 2013
Posts: 120
For those of you who have used Coosa, did you go with 3/4 or 1/2?
rowdyATX is offline   Reply With Quote
Old 01-31-2018, 12:08 PM   #8
Rivet Master
 
Foiled Again's Avatar
 
2012 25' FB Eddie Bauer
Vintage Kin Owner
Virginia Beach , Virginia
Join Date: Sep 2004
Posts: 6,203
How much does Coosa cost? Just nosy - don't need it (yet) but don't like to lose control of my bodily functions from extreme sticker shock either.
__________________
Today is a gift, that's why they call it the present.
Foiled Again is offline   Reply With Quote
Old 02-04-2018, 07:35 AM   #9
3 Rivet Member
 
rowdyATX's Avatar
 
1956 26' Cruiser/Overlander
1961 28' Ambassador
Currently Looking...
Austin , Texas
Join Date: Jan 2013
Posts: 120
Quote:
Originally Posted by Foiled Again View Post
How much does Coosa cost? Just nosy - don't need it (yet) but don't like to lose control of my bodily functions from extreme sticker shock either.


Im finding between $230-$300 depending on thickness. And yes, that is price per 4x8 sheet
rowdyATX is offline   Reply With Quote
Old 02-04-2018, 09:14 AM   #10
2 Rivet Member
 
1989 29' Land Yacht
St. Catharines , Ontario
Join Date: Aug 2016
Posts: 82
I thought of using Coosa, but at $400CDN each....that's too rich for my blood. I needed seven sheets and I botched one, so eight in total. That would've been $3200CDN!! I just used 3/4 plywood and coated all cuts and edges, and previous problem areas with penetrating epoxy, then over top with bilgekote. The bottom is untreated. I put drains in the channels that drain into the belly pan. I know now the problem areas that caused the floor to rot in the first place, so I took step to correct them. I figure the trailer should last another 40years! By that time it will be somebody else's problem.
As far as using 6mil.....I think it would wear through over time with movement.
ktmkirby is offline   Reply With Quote
Old 02-04-2018, 11:04 AM   #11
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 7,005
Images: 16
Blog Entries: 1
I have seen lots of Airstreams some 40 to 50 years old and have never seen a water problem from the bottom up. It has all been skin and window leaks.
__________________

__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic 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
Smartcore vs. ???? frjeff Floor Finishes 2 05-09-2017 05:15 AM
Installing Wood Planks Trixella Repairing/Replacing Floor &/or Frame 51 11-17-2014 06:40 AM
Allure sticky side planks Silverflames Floor Finishes 41 12-30-2013 03:53 PM
Allure Trafficmaster Vinyl Planks hippiechick Floor Finishes 53 06-09-2013 09:11 PM
Quarter mil A/S Astrodokk Airstream Motorhome Forums 17 06-30-2003 07:54 PM


Featured Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:11 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.

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