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Old 22-11-2020, 09:11   #1
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Emotionally, I canít take this anymore. (Windows)

Hereís what I came out to today.

It appears the garbage polycarbonate I was sold locally doesnít behave like the stuff I built the boat from originally.

Iím losing it, to be honest.

This would me my 7th F^CKING time doing these windows. And I canít progress on the boat until itís watertight.

Help!!!

Do I just start driving screws through the stuff into the cabin top?

This is breaking me, emotionally.
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Old 22-11-2020, 09:12   #2
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Re: Emotionally, I canít take this anymore. (Windows)

What's the new stuff doing differently?
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Old 22-11-2020, 09:15   #3
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Re: Emotionally, I canít take this anymore. (Windows)

Quote:
Originally Posted by rslifkin View Post
What's the new stuff doing differently?
Itís bending in this Fn heat.

The old stuff is right next to it in the pics. It expands and contracts like crazy but doesnít bend in half.
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Old 22-11-2020, 09:22   #4
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Re: Emotionally, I canít take this anymore. (Windows)

Hmm... What about running to the hardware store for some aluminum Z channel? Smear some sealant on the window and the channel, apply channel to the un-secured edge and screw it to the boat to hold everything in place?
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Old 22-11-2020, 09:27   #5
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Re: Emotionally, I canít take this anymore. (Windows)

Quote:
Originally Posted by rslifkin View Post
Hmm... What about running to the hardware store for some aluminum Z channel? Smear some sealant on the window and the channel, apply channel to the un-secured edge and screw it to the boat to hold everything in place?
It’s bowing like that for the full length.

I put some VHB tape down each upright member it rests on and it tore off the VHB tape and is bowed like crazy in the middle for the whole length of it.

Here it is as of yesterday before it was in the hot sun. The entire length is bowed out now that the sun hit it.

Essentially, it’s collapsing under its own weight

Right next to it, the old window you see here aft of the new one is fine. It’s tearing away the Dow 795 but it’s not bending at all an never has.
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Old 22-11-2020, 09:28   #6
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Re: Emotionally, I canít take this anymore. (Windows)

if it is a glue failure i would suspect a poor bond letting go due to high humidity when it was glued
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Old 22-11-2020, 09:37   #7
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Re: Emotionally, I canít take this anymore. (Windows)

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if it is a glue failure i would suspect a poor bond letting go due to high humidity when it was glued
It’s not. It’s a sheet of polycarbonate sitting in an upper and lower aluminum track I just spent 2 days on.

There was significant VHB tape on the uprights to keep it snug against the boat, it tore off the VHB tape and is collapsing under its own weight.

No sealant or adhesive applied yet. But this should have sat in the tracks, not collapsed under its own weight in the heat. The original Sabic polycarbonate is sitting right next to it ripping the Dow795 and VHB tape off slowly but surely through standard thermal expansion but isn’t collapsing under its own weight.


What next? I can’t do this anymore. I’m losing my mind. 7th time now, I believe.
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Old 22-11-2020, 09:49   #8
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Re: Emotionally, I canít take this anymore. (Windows)

Change of heart and glasswork required, but go to smaller ports and be done quickly, no wheel re-invention. I must assume that we see few boats with what you're trying to do because it just isn't easy to to or won't work without big problems (or requiring fundamentally different construction techniques).

FWIW, a few pictures below of a style of cabin-type perhaps similar to yours (i.e. angular) to visualize smaller yet large windows.
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Old 22-11-2020, 09:56   #9
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Re: Emotionally, I canít take this anymore. (Windows)

This is why you do not see plastic windows on production boats. The expansion is too great for effective sealing. You need to bite the bullet and pony up for high strength glass.
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Old 22-11-2020, 10:01   #10
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Re: Emotionally, I canít take this anymore. (Windows)

no clue as to a solution,
just sending you a wave of positive "fix-it" energy, chotu

hang in there



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Old 22-11-2020, 10:02   #11
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Re: Emotionally, I canít take this anymore. (Windows)

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Originally Posted by Singularity View Post
Change of heart and glasswork required, but go to smaller ports and be done quickly, no wheel re-invention. I must assume that we see few boats with what you're trying to do because it just isn't easy to to or won't work without big problems (or requiring fundamentally different construction techniques).

FWIW, a few pictures below of a style of cabin-type perhaps similar to yours (i.e. angular) to visualize smaller yet large windows.
Iím dying here. Definitely at the ďrethinkĒ it stage after all the old polycarbonate was destroyed by mold anyway. $4000 of the stuff. Florida mold grew on it and etched it.

I think this could be done with glass, but the weight would be horrendous. About 400lbs for the two sides. However, it would stay in place, not have thermal expansion issues and would be more easily able to take tint films.

The front windows are not a problem. Maybe I could go with glass on those later?

Soooo heavy though.

I hate to change the whole thing.

Basically, I need some ďcurtainsĒ of something to hang on the side that will look nice. Polycarbonate isnít it. **** sucks if Iím allowed to show my frustration. Lol
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Old 22-11-2020, 10:03   #12
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Re: Emotionally, I canít take this anymore. (Windows)

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Originally Posted by Woodland Hills View Post
This is why you do not see plastic windows on production boats. The expansion is too great for effective sealing. You need to bite the bullet and pony up for high strength glass.
That’s where I’m at.

I hate to give up the weight penalty, but at this point, I will never finish if I don’t

It’s a 200lb weight hit to do just the sides out of glass.

Maybe worth it.
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Old 22-11-2020, 10:04   #13
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Re: Emotionally, I canít take this anymore. (Windows)

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Originally Posted by wolfgal View Post
no clue as to a solution,
just sending you a wave of positive "fix-it" energy, chotu

hang in there



wolfie
Thank you for the good vibes. 😊
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Old 22-11-2020, 10:04   #14
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Re: Emotionally, I canít take this anymore. (Windows)

Funny, I just came upon a thread on this yesterday, but now where is it... looking...
OK found from another forum that you should look into using GE Ultraglaze Glazing Sealant (GE SSG4000) You may have to order it from GE directly. It is used by Bomar for their windows and is used for windows on skyscrapers. Supposedly it is good for plastic too, but good to double check.
Still looking for the other thread about plastics for windows..
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Old 22-11-2020, 10:09   #15
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Re: Emotionally, I canít take this anymore. (Windows)

I think it is to tight in its aluminium track.
Take the sheets out of the track and see if you can shave 1/8 or less of the panels.
It can be the same vertical dimension as the old ones but maybe not have the same thermal expansion factor.
Hope you get it sorted. Chears!
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