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Old 04-28-2014, 01:06 PM   #1
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Best Mold Resistant Subfloor Material

Wow - Airstream Forum threads have now become my favorite daily past-time! Such a welcome wealth of information out there. Thank you all.

The search is on now for the most suitable subfloor option. Anyone have any recommendations or feedback in reference to Hardie Board, Polyboard, or Nyloboard? I'm considering using Marmoleum flooring - don't know if that has any bearing on what type of subfloor I use.
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Old 04-28-2014, 01:31 PM   #2
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Engineered wood like product. That Airstream still uses plywood amazes me.
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Old 04-28-2014, 01:32 PM   #3
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Well, welcome aboard AirForums!

IMO, the best mold solution is to seal the trailer so it doesn't leak. The water primarily comes in the exterior seams and runs down the cavity between the walls and attacks the wood where it connects the shell/wall channel/frame. If the water can't get in, you won't have to worry about mold. Rarely, is it from the inside out...

As far as Marmoleum goes - we have installed it directly over the plywood subfloor. My concern wih some of the alternate products you mention is adhesion. Th glue used for the Marmoleum needs to be compatable - I know it is with plywood, not so certain with the others.

I would also be concerned about the rigidness of some of the alternate products...Airstreams flex as they move down the road...when we replaced our floor, we went with marine grade plywood. Figuring if the original plywood lasted 50+ years, I won't have to worry about it again in my lifetime.

Shari
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Old 05-13-2014, 10:02 PM   #4
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Thanks for the info on the type of flooring to use. I plan on using the marine board also for my 1958 overlander.
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Old 05-14-2014, 04:33 PM   #5
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Need Help saving my Airstream, broken frame

Hi all
Well after 6 months of full timing in our 1975 Sovereign the sagging frame
broke just aft the rear wheel. It had a 1/4 inch boiler plate bolted to it,
also another layer of steel with large holes in it, cracked em all.
I need some help. I am 78, retired, live on SS and that trailer is the
apple in my eye> I have removed the banana rap, there is some floor rot
but don't think that is fatal. So looking for some local help/...
We spent the 6 months house hunting and just settled in Pelzer SC, near
Greenville. Any nearby Airstream guys give a look and suggestions,
frame off is out of the question $$$$$ wise.
Thanks
Jim
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Old 05-14-2014, 05:29 PM   #6
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We used plywood with System Three epoxy. System Three epoxy worked great building my wooden kayak, so I figured should work well to keep water out of the plywood. A little expensive but should be no problems with rot.

System Three Resins - System Three Resins, Inc.

I purchased mine from Pygmy boats.

http://www.pygmyboats.com/
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Old 05-14-2014, 07:03 PM   #7
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I coated the subfloor with thompsons and the top with polyurethane so that the wood can breath and resist mold. The top was sealed to slow the effects of leaks and as long as they are sealed after we find them there should not be a problem. Keeping it clean and dry will keep the mold at bay.
Cliff
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Old 05-16-2014, 08:45 AM   #8
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I would like hear about the synthetics as well. Floor replacement is way down the road for me but I was looking at the Nyloboard option as I can get a solid 9X16 ft piece, if it seems better and not cost prohibitive.
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Old 05-17-2014, 01:19 PM   #9
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I have never heard of nyloboard but I heard of marine board and was told a product that will last along time. My 58 Overlander needs the whole floor replaced as there are 4 windows out of it. I'm doing a complete redo with modern stuff in it. I about to put glass in the windows and then cover the floor so I can do the side walls then do the floor. I am sure that the frame will need help too.
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Old 05-17-2014, 02:09 PM   #10
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Bar none the finest you will find is Gillfab 5065 an aircraft grade sandwich panel made from unidirectional fiberglass reinforced epoxy facings bonded to an aluminum honeycomb core. Used as flooring in commercial airlines cargo aircraft. Once installed as a direct replacement sized sheet you will never have too worry about rot, mildew, softening, delaminating, etc, etc. It is the final solution for all existing problems as seen here on ASF. Yes a little pricey - But the final fix for the total life of your baby. I was a little hesitant to do so, But after having a H2O fitting break while on a 4CU rally during New Years I committed and am ecstatic at the performance, quiet, warmth, weight savings I have received from doing so. I have pics somewhere and will attempt to find for all too see the results during installation and finish.
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Old 05-17-2014, 02:34 PM   #11
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Is that stuff easy to get?
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Old 05-17-2014, 02:42 PM   #12
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www.professionalplastics.com & Gillfab 5065

Can be purchased from "professionalplastics.com" as I did or any decent wholesaler in the aircraft repair business will do.
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Old 05-17-2014, 09:43 PM   #13
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Quote:
Originally Posted by shivtik View Post
Bar none the finest you will find is Gillfab 5065 an aircraft grade sandwich panel made from unidirectional fiberglass reinforced epoxy facings bonded to an aluminum honeycomb core. Used as flooring in commercial airlines cargo aircraft. Once installed as a direct replacement sized sheet you will never have too worry about rot, mildew, softening, delaminating, etc, etc. It is the final solution for all existing problems as seen here on ASF. Yes a little pricey - But the final fix for the total life of your baby. I was a little hesitant to do so, But after having a H2O fitting break while on a 4CU rally during New Years I committed and am ecstatic at the performance, quiet, warmth, weight savings I have received from doing so. I have pics somewhere and will attempt to find for all too see the results during installation and finish.

What do you mean by "direct size replacement"? Sorry I am a complete novice here. Do you mean you order the whole subfloor in "one" piece?

Also how pricey can I expect here? I am seriously considering this solution. I have a 70 globetrotter that I am trying to budget for.
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Old 05-18-2014, 07:22 AM   #14
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This sounds like the perfect fit. I was also reading about aluminum sub flooring.

I would like to hear from Aerowood and the other aviation mechs/engineers about this product
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