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Open Roads Forum  >  Tech Issues

 > Skylight crack repair

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D.E.Bishop

Eagle Rock, CA

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Posted: 02/09/19 10:17am Link  |  Quote  |  Print  |  Notify Moderator

Has anyone here attempted to weld a cracked skylight made of polycarbonate? I finally found a new dome but if I can fix it for a few cents instead of $140 plus shipping for a new dome, it would be worth it.

I have a hot air type welder and the correct rods as I've done repairs on other items. I will drill a stop crack hole first and then weld. One crack is where a mounting screw is located and I'll weld and then install a new screw on either side of the crack.


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Posted: 02/09/19 10:22am Link  |  Quote  |  Print  |  Notify Moderator

It's hard to plastic weld polycarbonate. Not enough flex in the material.

I just put a strip of EternaBond on mine.


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gbopp

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Posted: 02/09/19 10:35am Link  |  Quote  |  Print  |  Notify Moderator

I stop drilled mine and applied a strip of Eternabond. It's been several years and no leaks or problems.

PenMan

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Posted: 02/09/19 10:46am Link  |  Quote  |  Print  |  Notify Moderator

I just replaced mine. It had several cracks in it.


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IB853347201

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Posted: 02/09/19 02:43pm Link  |  Quote  |  Print  |  Notify Moderator

$140? What a deal. I would definately just replace it as fast as you can. Water damage from a crack/leak will cause more than $140 damage in the blink of an eye..

mobeewan

Hampton, Va

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Posted: 02/09/19 03:17pm Link  |  Quote  |  Print  |  Notify Moderator

I have some water damage due to cracks where the Dome transitions into the flanges. I didn't realize it until water dripped on my head while I was taking a shower. The water was running down the roof framing and then wicked its way on top of the ceiling paneling spreading out.

You really need to go ahead and replace it now while you can before you have a lot of water damage and have to start tearing into the roof. A temporary fix would be to put some Eternal Bond over the cracks. That would have least stop any possible water from getting through if it hasn't been already.

loggenrock

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Posted: 02/09/19 08:13pm Link  |  Quote  |  Print  |  Notify Moderator

Consider Lexel - got it at Home Depot. Crystal clear non-silicone caulk/sealant. Very flexible. About $7 for a small tube. Can't speak for long term durability - only started using it last summer, but very good results so far.


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Cummins12V98

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Posted: 02/10/19 06:08am Link  |  Quote  |  Print  |  Notify Moderator

Replace it, WHY risk potential water damage over 140 bones???


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larry barnhart

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Posted: 02/10/19 08:56am Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

Replace it, WHY risk potential water damage over 140 bones???


That is what I did in July because of a hairline crack that dicor fixed it to wait to get home last winter. Time and sun on a 2001 was the reason.

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D.E.Bishop

Eagle Rock, CA

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Posted: 02/12/19 05:23pm Link  |  Quote  |  Print  |  Notify Moderator

Well Folks, I am following the replace it posts, not because I want to but because there are quite a few cracks and several, maybe thousands of little hairline fractures just waiting for a little twisting or a tree limb or maybe even a gull to land on the dome.

I am skipping on the $140, plus shipping and buying from Lichtsinn. It's $11 more but I know that it is an exact replacement for the original dome.

I am not however going to use the same adhesive that Winnie used. It nay work but not applied the way the factory used it. There is some damage to the roof substrate and in part it was cause by the adhesive being installed in a very narrow area and not adhering well.

The roof is fiberglass laid over luan and foam under the roof. The foam is not glued to the luan. A small area if the luan has delaminated and I have a excellent waterproof adhesive that I will use to glue the lams back together. The glue is from a mill in Oregon and is used to laminate beams. I have some 1.5" by .125" mild steel that I intend to put between the luan and the foam. I will drill holes for mounting in the steel and use sheet metal screw to put the skylight, fiberglass and luan tight together and give the screws a better bite that just the glass and luan. I'l start work nextweek after this current storm has past, I'll post some pictures whan I'm done.

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