what thickness plywood is on your bed?

Discussion in 'Slide-Outs / Bunkends' started by Rideswithchrist, Nov 1, 2017.

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  1. Rideswithchrist

    Rideswithchrist Member

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    our bed is 1/2"

    We took out the sagging rotted OSB and replaced it with plywood but it does not feel as strong. I am not sure why, maybe because we are not fully buttoned back up yet.
    How thick is your bed? Will 1/2" plywood hold two adults (under 400 lbs total)
     
  2. lquinn1

    lquinn1 Member

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    I think mine is 3/4" but not sure if it is original or the PO did it.
     
  3. Rideswithchrist

    Rideswithchrist Member

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    3/4 sure would be better! I think we may lap another 1/4" over it
     
  4. Halford

    Halford Well-Known Member

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    with good wood glue in between. add brace underneath.
     
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  5. f5moab

    f5moab Retired from the Federal Government

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    I'm not sure, but whatever it is, it has held me (200 lbs) and another approx 240 pounds of dogs over the years with no problem.:D
     
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  6. Fless

    Fless Active Member

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    Unless it's cabinet-grade plywood, I'd rather use OSB. The plywood they sell these days is crap, unless you spend some $$. Don't buy the cheap stuff.
     
    Last edited: Nov 1, 2017
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  7. nineoaks2004

    nineoaks2004 Every meal is a picnic and every Day is a holiday

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    3/4 would be a best bet at least on most units, OSB is (as stated) also a good choice, but needs to be sealed, in fact I would seal any wood used top and bottom.
     
  8. Rideswithchrist

    Rideswithchrist Member

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    Well, our Lowes does not carry OSB in 1/2" (15/32) so we had to go with Plywood. From what we read OSB turns to mush when it gets wet and humidity alone will cause it to sag sooner.
     
  9. Rideswithchrist

    Rideswithchrist Member

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    Original was 1/2". We wanted to go 3/4" and router the edges but we do not have a router so that limited our plans a bit.
     
  10. tombiasi

    tombiasi Well-Known Member

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    OSB won't turn to mush, particle board will.
     
  11. Fless

    Fless Active Member

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    You can also seal your wood with SPAR Urethane (not Polyurethane). It allows the wood to breathe and is waterproof -- to a point.
     
  12. Rideswithchrist

    Rideswithchrist Member

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    The chipboard/OSB that was on it was pretty much mushy expanded crumbles where it had gotten wet-plus it had a horrid sag, which makes me wonder why the newer builds use plywood...BUT the 1/2" plywood Lowes had was not very good.
    For now we are going to lap 1/4 plywood" over the 1/2" we have and for the other side...we will use 3/4" and find a router to get it to fit.
     
  13. tombiasi

    tombiasi Well-Known Member

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    Must have been a severe case. It takes prolonged wetness for that to happen, unless they are selling really crap wood lately.
     
  14. Halford

    Halford Well-Known Member

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    yea my previous popup had rotten OSB board in the cargo storage area. Caused by prolonged wetness in same area. Won't hurt if it got wet once but constant wetness is the problem with OSB. Plywood gets ruined in short time... much shorter than OSB board.
     
  15. Rideswithchrist

    Rideswithchrist Member

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    1992... so 26 year of whoknowswhat :) PLUS it was from Michigan so I am guessing snow/humidity took a tool, plus maybe leaky spots.

    We sandwiched another 1/4" on top and it is heavy and solid. Not sure what we will do on the Queen side as it is not as long so may be ok with a nice 1/2" Plywood-? Oddly, the 1/4" was stronger and nicer than the 1/2" from a different store so I guess we got C grade the first time.
     

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