Coating on OSB?

Discussion in 'Coop & Run - Design, Construction, & Maintenance' started by ducks_rcool329, May 7, 2011.

  1. ducks_rcool329

    ducks_rcool329 Chillin' With My Peeps

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    Apr 17, 2011
    Black Forest, Colorado
    So for my coop that is being built right now, I used spran-urithanie deck coating to water-poof it. Its drying now.... Its clear and it says it works great for water, temps, sun, wear-and tear (walking).
    What I would like to know is, should i put something over it, like an exterior latex paint? Thanks!!
     
    Last edited: May 7, 2011
  2. JackE

    JackE Chillin' With My Peeps

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    North Eastern Md.
    I don't think paint would stick to the urethane. You might want to think of vinyl siding, Kinda cheap, easy to work with. Thats what usually goes over waferboard sheathing.
    Jack
     
  3. Yetti

    Yetti Chillin' With My Peeps

    As of late I have had very bad luck painting OSB. I build bird houses and the ones I make with flat roofs were weathered and I thought I would give them a coat of good paint to make them last longer. turns out the paint made the wood hold water and it turned to wet paper machete! it crumbled in my hands this spring after the winter here in Michigan. I had to replace about 50 and burn the remains of the ones that rotted. I suggest covering the osb with a secondary coat like a shingle or siding. whatever you do the material has to breath so the wood can dry out.
     
  4. cooper38

    cooper38 Out Of The Brooder

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    Paint over poly never works especially when done on a exterior application. When ever you use osb on the exterior it will pay in the long run to cover it with something designed for the exterior. You could even use a T1-11, or any 4' x 8' type siding instead of osb.
     
  5. ducks_rcool329

    ducks_rcool329 Chillin' With My Peeps

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    Apr 17, 2011
    Black Forest, Colorado
    Thanks for all the suggestions, but the OSB is not the siding, i got artificial siding for that [​IMG] (sorry, should have specified that)

    The OSB is just for the floor, and it will have a heavy layer of shavings on it, It will be protected from the weather.
    So far i have...
    2 layers of SPRAN-urithans
    2 layers of rubber roof sealer
    1 layer of exterior latex stain

    Should I add more layers, or cover it with something? thanks!
     
    Last edited: May 8, 2011
  6. JackE

    JackE Chillin' With My Peeps

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    Apr 26, 2010
    North Eastern Md.
    Quote:I hope you didn't put down the spar urethane first. I don't think anything will stick to it properly. You should have just went with the rubberized roof coat by itself.
    Jack
     
  7. ducks_rcool329

    ducks_rcool329 Chillin' With My Peeps

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    Apr 17, 2011
    Black Forest, Colorado
    I put the rubber stuff down, then the spar, then the rubber, then the pain... and now that its dry I poured a little water on it, well it just slid off like it was plastic lol...
     
  8. okieski

    okieski New Egg

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    Why not just spray it with Kilz then paint it with a good exterior paint? That is what I did over the roof of our coop. I've never applied spar over OSB but I would think with a coat of shellac for a sealer/primer you would be ok. Zinseer makes a sealer that works great.

    Jeff
     
  9. okieski

    okieski New Egg

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    Apr 24, 2011
    I should have read the post more...Scuff the poly you applied then finish with shellac or kilz.

    Jeff
     

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