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Old 26-01-2011, 20:20   #1
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Replacing Portlight Glass ?

We've got one portlight which has a crack in the tempered safety glass. We checked with New Found Metals and they don't have portlights like ours so rather than replace all of our portlights (if one didn't match it would drive us crazy) we'd really just like to get the glass replaced as the frame is in excellent condition. Anyone know where we might be able to get this done? Our local glass guys seem to freak at the thought of working on a boat item...
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Old 26-01-2011, 22:13   #2
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It would seem to me that any glass/tile place should be able to make up a replacement pane for you. I've had several small jobs that needed odd cuts and the local guy was just great. Tell him what you need, making sure he knows its gotta be tempered safety glass and he should be able to do it.


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Old 27-01-2011, 05:36   #3
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Thanks Sabrekai. I thought the local glass peeps should be able to dit as well but I am running into the same problems I've had with getting Corian on the boat. It all sounds doable until they find out it is for a boat, then they freak out and say they can not do it!
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Old 27-01-2011, 06:22   #4
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If you have traditional portlights, it's usually possible to remove the hinge pins and take the frame holding the glass off of the port. You need to to this to replace the glass, anyway. On most traditional bronze portlights, there is a bronze ring holding the glass into the frame. The ring is held in with tiny machine screws, which are often under the gasket.

Either take the whole assembly to your glass shop, or disassemble it and take them the glass. Automotive safety glass works well and is easy to find. Clean everything thoroughly to get rid of the old sealant. Put it back together with your favorite bedding compound to seal the glass in. I've used silicone, polysulfide, and others, with varying results. I would not use 5200, as someone will eventually want to take it apart again.

It's not a hard job. The tough part is usually getting the old glass out. A thin, sharp, flexible blade applied with patience works, but the best way is to use a Fein multimaster with the flush cut sawblade if you have one handy. It's certainly easier than replacing the whole portlight. I've done my dozen ports more than once, as the safety glass tends to delaminate after some years, clouding the view.

Good luck with your refit.
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