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Old 05-14-2012, 01:22 PM   #1
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Help to waterproof skylight.


I'm making a shed, I'm gonna put the plywood on the roof soon, but I don't really know how to waterproof the skylight. Do I have to buy some flashing kit, or can I just use some roofing caulking? My skylight is 2 feet by 2 feet.

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Old 05-14-2012, 02:51 PM   #2
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Help to waterproof skylight.


the roofing forum may be a better place for this.

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Old 05-14-2012, 03:28 PM   #3
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Help to waterproof skylight.


No opening in a roof can just be caulked; flashing is critical. Some skylights come with a flashing kit. The box stores sell these kits, as well.
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Old 05-14-2012, 04:25 PM   #4
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Help to waterproof skylight.


Quote:
Originally Posted by humberguy
I'm making a shed, I'm gonna put the plywood on the roof soon, but I don't really know how to waterproof the skylight. Do I have to buy some flashing kit, or can I just use some roofing caulking? My skylight is 2 feet by 2 feet.
Skylights come with a flashing kit. Where's yours?
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Old 05-14-2012, 04:33 PM   #5
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Help to waterproof skylight.


They don't all come with kits. Especially that craigslist brand.

They all do need flashing though. Post a picture of what you got.
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Old 05-14-2012, 06:06 PM   #6
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Help to waterproof skylight.


my skylight didn't come with a flashing kit. Im guessing ill check home depot to see if they have a flashing kit.
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Old 05-14-2012, 06:16 PM   #7
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Help to waterproof skylight.


HD won't have a kit. You'll need a roofer to design the correct kit for your application. Each skylight kit is unique to each skylight.

Do anything less, and it'll be just as good as cutting the hole and just leaving it that way. There are plenty of flashing pix on my website that would give you some idea of what's involved, though I don't recall any SL pictures.
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Old 05-14-2012, 06:17 PM   #8
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Help to waterproof skylight.


Velex sky lights all come with a flashing kiit.
There was to many sky light leaks years ago that now most come with it incuded to avoid DIY flashing.
For a sky light that size your going to have to do some reframing of the rafters.
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Old 05-14-2012, 06:37 PM   #9
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Help to waterproof skylight.


This is all you need for something that small.


http://www.cofair.com/butyl.aspx
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Old 05-14-2012, 07:36 PM   #10
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Help to waterproof skylight.


Is the skylight a deck mount or a curb mount ?

Velux lids do not come with a flashing kit to accomodate all rooof types.

If its a curb mount then your roofer or you need to flash it yourself. This flashing will vari depending on the roof type.

I have 8 skylights being install on a roof atm, all are velux deck mounts. Each flashing kit was $200 extra and are in fact all useless for the roof type we are installing. We are making our own flashings and the customer is returning the kits.

The question is, what kind of roof do you have and what type of skylight do you have.

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