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Old 02-08-2014, 11:32 AM   #1
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Window sill water damage


I have a 2y/o 2 story house in coastal Ga. I have 5 windows in the house that show significant water damage on the interior window sills. All 5 are on the NE and SE sides of the house, 3 upstairs and 2 downstairs.

See the attached pic.

My questions are; 1. Is this common and 2. How do i diagnose the source?

I've looked around the exterior of the windows and don't see anything that was an obvious red flag. Also confirmed these windows close tightly.

Any ideas?
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Window sill water damage-image-661827337.jpg  

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Old 02-08-2014, 12:02 PM   #2
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Window sill water damage


Unless you have water dripping from above on the inside, a better picture to post would be of the windows from the outside.

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Old 02-08-2014, 12:09 PM   #3
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Window sill water damage


Sounds like a poor install job. Possibly no flashing or wrong flashing. When you figure out the issue with one window I would bet that every window in your house is the same. You may need to remove some of the siding to see and repair the issue.
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Old 02-08-2014, 01:14 PM   #4
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Window sill water damage


Quote:
Originally Posted by joed View Post
You may need to remove some of the siding to see and repair the issue.
May be brick, stucco or a brick veneer on the outside
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Old 02-08-2014, 01:21 PM   #5
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Window sill water damage


Here are 3 good threads in my opinion on this forum that deal with window water issues. Look thru them. May answer some of your concerns.

Moisture through brick wall


Front windows leaking


Builder pay for his mistake?
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Old 02-10-2014, 08:18 AM   #6
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Window sill water damage


Thanks for all the responses.

I'm going to get a pic of the outside of one of the windows tonight and take a look at those other threads.

BTW: the entire exterior is Vinyl siding.
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Old 02-10-2014, 08:41 AM   #7
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Window sill water damage


It's common to find windows that where not installed properly.
EG: House wrap not installed over the top nailing fin.
No caulking behind the nailing fin.
No window sealing tape over the nailing fins or it was installed wrong.
Simple enough to pop a piece of siding loose to take a peek to see what's up.
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Old 02-10-2014, 10:55 AM   #8
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Window sill water damage


I'm going to pop the siding off later this week and take a look.

Is there a tutorial with pictures somewhere that I can look at to see what correct installation looks like?
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Old 02-10-2014, 11:00 AM   #9
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Window sill water damage


http://www.finehomebuilding.com/how-...correctly.aspx
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Old 02-10-2014, 07:46 PM   #10
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Window sill water damage


Be sure to check the following as well:

Blocked pocket sill
Leaky interior sill dam leg

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