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Old 06-29-2020, 07:55 PM   #1
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How to stop leak from open deck into sunroom


Greetings from Chicago:

See attached pictures. I have a 16 feet x 9 feet open deck above my sunroom. It leaks when rains. I put a tarp on the side where it was leaking and the leaking stopped. So the water is getting between the decking and flowing on top of the current roof membrane to the gutter and in that process there are some leaks on the roof membrane which lets the water down into the sunroom. I have a half inch clearance between the bottom of the door and the top of the deck where I can lay waterproof material - permanent - and fix this leak. I don't want to rip the deck and posts to get to the current roof membrane under the decking. What material can I use to lay upto half inch in thickness that will work as a deck flooring and water proof roofing? Can the material be painted to match the deck post color ?
Or is there another suggestion?

Thanks!
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How to stop leak from open deck into sunroom-deck-pic-1.jpg   How to stop leak from open deck into sunroom-ceiling-1.jpg   How to stop leak from open deck into sunroom-deck-pic-2.jpg  
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Old 06-29-2020, 11:45 PM   #2
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Re: How to stop leak from open deck into sunroom


You are pretty much asking the impossible. The only thing you could do (depending on how well it is done, it might not last very long and would likely need constant monitoring and repair is to put down plywood and a fiberglass membrane.

See
for an example of how it could be done. (Not mine)
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Old 06-30-2020, 12:01 AM   #3
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Re: How to stop leak from open deck into sunroom


Hi Xsleeper,

How about 2 ply modified bitumin torch down roofing system?


start watching at 6:33 and you can see the kind of finish - white - that can be achieved

Thoughts?
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Old 06-30-2020, 12:37 AM   #4
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Re: How to stop leak from open deck into sunroom


Possibly, but its thicker and not nearly as attractive and it would still need to be applied over plywood. I doubt you would find anyone who would apply it directly to your decking.
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Old 06-30-2020, 06:59 AM   #5
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Re: How to stop leak from open deck into sunroom


So quarter inch plywood can be laid on top of the current decking before applying it ?
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Old 06-30-2020, 07:49 AM   #6
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Re: How to stop leak from open deck into sunroom


I would use the thickest sheathing grade plywood you possibly can.
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Old 06-30-2020, 10:23 AM   #7
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Re: How to stop leak from open deck into sunroom


Quote:
Originally Posted by johnbalc View Post
I don't want to rip the deck and posts to get to the current roof membrane under the decking.
Why not?

So you'd rather spend, guessing $3500, for someone to put a new membrane over your deck making it half-a$$, rather than just take up a few boards, and probably spend $80 on some flashing at a couple post penetrations or along the wall where it's leaking?

If you were to find the existing roof in complete disrepair, wouldn't you rather spend the same $3500 fixing the real roof then?
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