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Old 03-16-2007, 11:53 AM   #15
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Advantec

If it's all about the money, go with plywood, marine grade or exterior grade. If it's about durability and the lifetime of the floor, consider this; visit your local lumberyard and inquire about ADVANTEC. I believe that I have the spelling correct, anyhow, they will know what to tell you. This 'plywood' comes with a guarantee that you will need to ask about. I've used it in construction and tested it in all kinds of weather over a yearlong project. It never changes in thickness or character. We utilized it from that point forward in subfloors that would be exposed to the elements for long periods until the roof was 'dried in'. The material is a little heavier than plywood and is costly; however, darned good insurance for the long haul. Good luck.
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Old 03-16-2007, 12:17 PM   #16
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. . consider this; visit your local lumberyard and inquire about ADVANTEC. I believe that I have the spelling correct, anyhow, they will know what to tell you.
The spelling is Advantech, manufactured by Huber.
I used exterior plywood on my floor, but if i was doing it again I would use Advantech. The specs are just to good to ignore.
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Old 03-16-2007, 12:27 PM   #17
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Thanks for 'spellchecking' me Mark! ;-) and for confirming my thoughts about the product. Modern technology is great, even if we do pay more for it at times.
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Old 03-16-2007, 06:22 PM   #18
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maybe 10-12lbs, the benefits out weight that many times over.
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Old 03-16-2007, 09:35 PM   #19
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I like your idea of using fiberglass cloth and the resin. I have a small area I need to repair and had no idea how to handle the situation til I read your article.
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Old 03-17-2007, 11:03 AM   #20
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The Airstream floor is 5/8 - however the tile on top of the floor (in which the shell sets on) is 1/8 - so 5/8 + 1/8 = 6/8 or 3/4. This is a calculation I missed when I did my floor - I saw the plywood was 5/8 so that is what I used - I wished I had used the 3/4 - oh well - the 5/8 is working well, the tile on top probably does not add any structure anyway and is just filler.

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Old 03-24-2007, 01:07 AM   #21
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After a discussion with a friend, I was thinking of using a 1/2" sub-floor plywood underlayment, then a 1/4" over the top for additional strength. Would a straight 3/4" be better?

Any thoughts about coating the plywood with a good primer (surface + edges) before installation? This should help slow any moisture seepage if any.

Is there a treated plywood sheating that helps resist termintes etc...? I will have to look into the Advantech stuff.

At Home Depot or Lowes, there does not seem to be 1/2" plywood.
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Old 03-24-2007, 06:42 AM   #22
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3/4 is stronger than 1/2+1/4, because the 3/4 is one set of plys acting together as a total unit.

At the lumber yard Lowes HD you get something that is close to the thickness as you can they are playing games with 32's of an inch as a price game.
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Old 03-24-2007, 10:21 AM   #23
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Europly

I am thinking that a stiff floor is what I want. I am in the middle of a frame off and I was thinking of using 'Europly' it is much stiffer than standard plywood due to the number of layers in the sheet. It is like Baltic Birch but is available in 4' x 8' sheets and is FSC Formaldehyde Free for those who care.
A 1/2" sheet is 9 ply and 3/4" is 15 ply. The prices I have found is $85.00 for 1/2" and $91.00 for 3/4". 24 foot trailer will take 5 sheets. I was planning on pre-treating it with some type of water repellent, and I'm trying to figure out what I'll use.
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Old 03-24-2007, 10:44 AM   #24
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Gary

Is this on the Argosy you are doing a frame off?

Anyway I coated my edges with epoxy and then sealed the floor with varathane. You have to be careful when using wood treatment in that it won't gas you out of the trailer....stuff should be made for indoor use.

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Old 03-24-2007, 10:49 AM   #25
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Yep, it is our 1977 24' rear door, number 60 of 60 made. The floor really is a pile of mush. It appears the 1/2" plywood originally used fractures internally and it loses its stiffness. No rot, just flabby. Thanks Ken, I'll look into the interior grade water proofing.
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Old 03-24-2007, 12:58 PM   #26
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Yep, it is our 1977 24' rear door, number 60 of 60 made. The floor really is a pile of mush. It appears the 1/2" plywood originally used fractures internally and it loses its stiffness. No rot, just flabby. Thanks Ken, I'll look into the interior grade water proofing.
Gary, I think Argosy trailers got 1/2" floors to save weight. Have you considered putting in the thicker flooring, like an Airstream of the same era would have had?
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Old 03-24-2007, 08:48 PM   #27
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Oh ok - its not the one you have had all along - you must have snuck another on in on me - I don't know if you know this, but I did look at your original Argosy in Boisie when I was up there visiting Charle - even thought about buying it - its a very nice trailer.

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Old 03-24-2007, 10:13 PM   #28
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my 1978 argosy used 15/32 5 ply plywood and it had voids all over. bruce
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