Looking for advice on glass/perspex for boats.

Discussion in 'Boat Design' started by MurphyLaw, Jul 16, 2018.

  1. MurphyLaw
    Joined: Aug 2012
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    Location: Mars

    MurphyLaw Senior Member

    Anyone know what's good for windows/portholes on a boat I presume without any research that poylcarbonate will be the best as that is what is the toughest for eye glasses. I like real glass, from my experience in aviation I know how often the perspex windows get changed out, perspex clouds with UV and scratches easy.

    Am I wrong?

    1. What is the strongest if you are going to use for holes in your hull? what thickness ?

    2. I am thinking of going auto windscreen glass but putting a crossbeam in the middle otherwise I am sure a big enough wave will cave it in.

    3. What do most builders use?
     
  2. JSL
    Joined: Nov 2012
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    JSL Senior Member

    look at tempered or toughened glass as is required by classification societies (ABS, DNV, Lloyd's, etc) . Thickness depends on lens size. If in the hull, fit deadlights.
    Plastic, lexan, laminated glass not the best.
     
  3. Squidly-Diddly
    Joined: Sep 2007
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    Squidly-Diddly Senior Member

     
  4. Squidly-Diddly
    Joined: Sep 2007
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    Squidly-Diddly Senior Member

    which definition of Deadlights? I'm seeing both tough, solid shudders and fixed "lights" that can't be opened.

    Maybe fixed lights WITH outside shudders? Are the shudders themselves waterproof? Inside or outside mounted? Got examples?
     

  5. JSL
    Joined: Nov 2012
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    Location: Delta BC

    JSL Senior Member

    you can google 'porthole deadlights' (Sometimes called 'shutters')
    A good deadlight (for a round porthole) will have at least 4 'dogs'(2 in way of hinge), waterproof, and equivalent strength to the adjacent hull
     
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