Forum Title: Installing replacement IGU
Hi. I am replacing the thermal glass in a large picture window, and the original window is set in with caulk. What is the proper sealant to use? I was going to go with regular 100% silicone. Tia, Jeff
Category: Windows & Doors Post By: BRENT CALDWELL (Mountain View, CA), 01/06/2019

Yes, it's likely mold that grows only when conditions are favorable... likely during winter months when the interior of the room is cold and negative pressure brings warm moist air in. The door stop is where the two contrasting temperatures meet and where condensation occurs, and the mold can only grow when the humidity level there is high. At all other times of the year it will be dormant due to a lack of moisture. It could also be dust that accumulates on the trim when it's moist. Clean it off and forget it. Its nothing to worry about.

- DANA RIOS (Rialto, CA), 02/27/2019

Thanks for the quick reply. The guy in the video I watched used caulk and made it look easy, but I like the idea of glazing tape. I will check it out. Thanks again.

- MARCUS WEBER (Upland, CA), 02/13/2019

Here's an example.

- NATHANIEL GREGORY (South Bend, IN), 03/02/2019

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