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Old 07-23-2021, 11:04 PM   #1
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Location: Tucson AZ
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Resealing leaking windows?

So, after our huge monsoon last night, two of my windows are leaking. From what I understand, and tell me if I'm wrong, the best thing to do is take the window off, butyl tape it, clean the area of old sealant and reattach the window, then reseal it with new caulk. Maybe not in that particular order. Lol. Could anyone tell me if there's something better to do or something to try first, and please link me to what caulk I should use if not.
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Old 07-24-2021, 06:23 AM   #2
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I've done dozens of RV windows & doors.

Use both of these:

Lay the tape on the window flange, then run a heavy bead of butyl in the corner of the window frame.

A bead of clear silicone across the top and down the upper corners after the window is installed for good measure.
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Old 07-25-2021, 08:03 AM   #3
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When reinstalling make sure the weep hole(s) are cleared and installed on the bottom.
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Old 07-25-2021, 08:48 AM   #4
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I had a rear window that would leak in heavy rain. Tried to find leak for years and could not. When the rig was painted all the caulk had to be removed and redone after paint. Windows were not removed. When it was resealed the leak was gone.

The first thing I would try before pulling the windows completely would be to remove all the caulk and reseal with a good caulk. I personally use RV Pro Flex but there are others I'm sure. If that does not do the trick then remove and do what the others say.

You did not say what type of windows are leaking. If they have weep holes at the bottom that may be what is causing the leak. Get someone to hold a towel inside so mop up any water and then use a hose with a nozzle and spray (short blasts) into the weep holes and let them drain out. Repeat as many time as required until the crap stops coming out. You will be surprised how much stuff will come out and how little it takes to plug them.
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Old 07-26-2021, 10:20 PM   #5
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This was a new window install where there was none.

#1 hole cut in slide.
#2 putty tape under frame work (most box stores or hardware)
#3 Window in
#4 Putty tape
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leak, seal, wind, window

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